Fixed cycle delay

Delay code

Shortest possible CPU code that creates N cycles of delay, depending on constraints.

All code samples are written for CA65.

Assumptions:

• No page wrap occurs during any branch instruction. If a page wrap occurs, it adds +1 cycle for each loop, completely thwarting the accurate delay.
• No interrupt / NMI occurs during the delay code. Code samples where an interrupt could cause data corruption are separately indicated.

It is permissible for DMA to steal cycles during the loops. If you are expecting that to happen, you have to manually adjust the delay cycle count (and it is in fact possible to do so) in order to get the correct delay.

Explanations on the requirements

• @zptemp means you have a zeropage address that you can write random data into.
• @ptrtemp means you have on zeropage a pointer to a byte somewhere you can read and write random data without side effects.
• @rti means you have a dummy interrupt handler installed that does nothing but RTI.
• @rts12 means you know a memory address that contains byte $60 (RTS).
• @rts14 means you know a memory address that contains a harmless 2-cycle instruction that fits your constraints (such as CLC, LDA #0, or NOP), followed by RTS.
• @rts15 means you know a memory address that contains a JMP that jumps to another location that contains RTS. Alternatively, it means you know a memory address that contains a harmless 3-cycle instruction that fits your constraints (such as LDA $00), followed by RTS.
• delay_a_25_clocks, delay_256a_16_clocks, delay_256a_x_33_clocks, delay_256a_x_31_clocks, and delay_256x_a_30_clocks are defined at Delay code.
• "Unsafe for interrupts" means that even though the S register is not clobbered, data corruption will occur if an interrupt/NMI happens in the middle of the delay code.

Instructions, addressing modes, byte counts, cycle counts and notes

Addressing mode	Instruction type	Bytes	Cycle count	Example instruction	Notes
Implied	Inter-register	1	2	TAX	NOP has no side effects. Flag-manipulations like CLC, and SECCLV are used when their effects are desired.
Implied	Stack push	1	3	PHA	PHP is only paired with PLP.
Implied	Stack pop	1	4	PLA
Implied	Return	1	6	RTS	We do that indirectly when paired with JSR. Similarly for RTI.
Immediate		2	2	CMP #$C5	Includes instructions like LDA, LDX and LDY. Other ALU instructions are used in more complex situations.
Relative	Branch	2	2—4	BCC *+2	Branch takes 3 cycles when taken, 2 otherwise. A page crossing adds +1 cycle when branch is taken, but because of difficulties setting that up, we don't use it.
Zeropage	Read, write	2	3	LDA $A5
Zeropage	RMW	2	5	INC @zptemp	Writing to zeropage is only permitted when @zptemp is available. Technically we could save @zptemp into register and restore at end, but it is bytewise inferior to other techniques.
Zeropage indexed	Read, write	2	4	LDA $EA,X	Inferior to 2 × NOP, but useful for hiding additional code to be executed in a loop.
Zeropage indexed	RMW	2	6	INC @zptemp,X	Only done X is known to be 0, or when entire zeropage can be clobbered.
Indexed indirect	Read, write	2	6	STA (@ptrtemp,X)	Only doable when X is known to be 0.
Indexed indirect	RMW	2	8	SLO (@ptrtemp,X)	The most cost-effective instruction. Only doable when X is known to be 0, lest we write to a random address. All instructions in this category are unofficial.
Indirect indexed	Read	2	5—6	LDA (@ptrtemp),Y	Never used by this code.
Indirect indexed	Write	2	6	STA (@ptrtemp),Y	Only doable when Y is known to be 0.
Indirect indexed	RMW	2	8	SLO (@ptrtemp),Y	All instructions in this category are unofficial.
Absolute	Jump	3	3	JMP *+3
Absolute	Read, write	3	4	LDA $2808	Inferior to 2 × NOP, but can be used carefully to hide additional code to be executed in a loop.
Absolute	RMW	3	6	INC $4018	Inferior to 3 × NOP.
Absolute indexed	Read	3	4—5	LDA $0200,X	Inferior to shorter alternatives.
Absolute indexed	Write	3	5	STA $0200,X	Inferior to shorter alternatives.
Absolute indexed	RMW	3	7	INC $4018,X	Only done when writing into the given address is harmless considering the possible values of X.
Absolute indirect	Jump	3	5	JMP (@ptrtemp)	Inferior to shorter alternatives.

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2 cycles

1 bytes
EA NOP	No requirements

• All instructions cost at least 2 cycles. There is no way to do 1 cycle of delay (though −1 cycles may sometimes appear in branch cost calculations).

3 cycles

1 bytes
48 PHA	Clobbers S; and writes in stack
2 bytes
C5 C5 CMP $C5	Clobbers Z&N, and C
24 24 BIT $24	Clobbers Z&N, and V
A5 A5 LDA $A5	Clobbers A, and Z&N
A6 A6 LDX $A6	Clobbers X, and Z&N
A4 A4 LDY $A4	Clobbers Y, and Z&N
85 xx STA @zptemp	Requires @zptemp
04 04 NOP $04	Requires support for unofficial opcodes
3 bytes
4C xx xx JMP *+3	Not relocatable code

• Not relocatable means that the target address is hardcoded into the code. In ROM hacking, it sometimes makes sense to move code blobs around, and a hardcoded address makes it difficult to relocate the code. This restriction does not apply to branches, which use relative addressing. It is also assumed to not apply to JSR instructions, as chances are the JSR target is outside the code being relocated.

4 cycles

1 bytes
68 PLA	Clobbers A, S, and Z&N
2 bytes
EA ... NOP × 2	No requirements

• zp-indexed modes such as LDA $00,X also do 4 cycles, but having side effects, these two-byte instructions are inferior to a simple 2 × NOP.
• There is also an unofficial opcode NOP $00,X (34 00), but there is no reason to use this instruction when the official equivalent has the same performance.

5 cycles

2 bytes
E6 xx INC @zptemp	Clobbers Z&N; and requires @zptemp
EA NOP 48 PHA	Clobbers S; and writes in stack
3 bytes
18 CLC 90 00 BCC *+2	Clobbers C
B8 CLV 50 00 BVC *+2	Clobbers V
EA NOP A5 A5 LDA $A5	Clobbers A, and Z&N
EA NOP A6 A6 LDX $A6	Clobbers X, and Z&N
EA NOP A4 A4 LDY $A4	Clobbers Y, and Z&N
EA NOP 85 xx STA @zptemp	Requires @zptemp
EA NOP 04 04 NOP $04	Requires support for unofficial opcodes
4 bytes
EA NOP 4C xx xx JMP *+3	Not relocatable code

• abs-indexed modes such as LDA $1234,X cause 4 or 5 cycles of delay, depending whether a page wrap occurred. Because you need extra setup code to make sure that a wrap does occur, you do not see this mode in these samples, outside situations where circumstances permit.

6 cycles

2 bytes
F6 F6 INC $F6,X	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
48 ... PHA × 2	Clobbers S; and writes in stack
EA NOP 68 PLA	Clobbers A, S, and Z&N
3 bytes
EA ... NOP × 3	No requirements

• zp-indexed RMW instructions such as INC @zptemp,X do 6 cycles. Unless we know the value of X, it might write into any address between $00-$FF. This option is only useful if the entire range of $00-$FF is free for clobbering with random data, or if X has a known value.
• ix instructions like LDA ($00,X) do 6 cycles, but the value of X decides where a pointer is read from, and said pointer can point anywhere. We only do that when the value of X is known.
• iy instructions like LDA ($00),Y also do 5-6 cycles, but in addition to the note above, we cannot predict whether a wrap occurs or not. So we don't use this mode.
• Absolute RMW instructions like INC $4018 do 6 cycles, but weighing 3 bytes with side-effects it would be inferior to 3 × NOP.

7 cycles

2 bytes
08 PHP 28 PLP	Writes in stack
68 PLA 48 PHA	Clobbers A, and Z&N
3 bytes
EA NOP E6 xx INC @zptemp	Clobbers Z&N; and requires @zptemp
FE 00 02 INC $0200,X	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X	Clobbers Z&N; and requires writable $700-$7FF
4 bytes
18 ... CLC × 2 90 00 BCC *+2	Clobbers C
B8 ... CLV × 2 50 00 BVC *+2	Clobbers V
EA ... NOP × 2 A6 A6 LDX $A6	Clobbers X, and Z&N
EA ... NOP × 2 A4 A4 LDY $A4	Clobbers Y, and Z&N
EA ... NOP × 2 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 2 04 04 NOP $04	Requires support for unofficial opcodes
5 bytes
EA ... NOP × 2 4C xx xx JMP *+3	Not relocatable code

• PHP-PLP is very efficient for 7 cycles of delay, but it does modify stack contents. S register remains unchanged though.
• PLA-PHA does not overwrite any bytes in stack. It just writes back the same byte. But it does clobber A and Z+N. It is not interrupt-unsafe either: If an interrupt happens, the stack byte does get temporarily clobbered, but the value is still in A when the interrupt exits, and gets written back in stack.
• abs-indexed RMW instructions such as INC abs,X do 7 cycles. We only do this when either we know the value of X (for instance, INC $4018,X is safe when X is 0—7, or when the entire 256-byte page can be safely overwritten with random data.

8 cycles

2 bytes
68 ... PLA × 2	Clobbers A, S, and Z&N
3 bytes
BA TSX 68 PLA 9A TXS	Clobbers A, X, and Z&N; and unsafe for interrupts
EA NOP F6 F6 INC $F6,X	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
EA NOP 48 ... PHA × 2	Clobbers S; and writes in stack
AA TAX 68 PLA 8C TXA	Clobbers X, S, and Z&N
A8 TAY 68 PLA 98 TYA	Clobbers Y, S, and Z&N
4 bytes
EA ... NOP × 4	No requirements

• Unofficial ix and iy RMW instructions such as SLO ($00,X) or SLO ($00),Y would do 8 cycles for 2 bytes of code. We only do that if we know X or Y to be zero, and we have a known pointer to safely rewritable data.

9 cycles

3 bytes
EA NOP 08 PHP 28 PLP	Writes in stack
EA NOP 68 PLA 48 PHA	Clobbers A, and Z&N
4 bytes
A2 AE LDX #$AE ;hides 'LDX $FDD0' D0 FD BNE *-1	Clobbers X, and Z&N
A0 AC LDY #$AC ;hides 'LDY $FDD0' D0 FD BNE *-1	Clobbers Y, and Z&N
EA ... NOP × 2 E6 xx INC @zptemp	Clobbers Z&N; and requires @zptemp
EA NOP FE 00 02 INC $0200,X	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X	Clobbers Z&N; and requires writable $700-$7FF
5 bytes
18 ... CLC × 3 90 00 BCC *+2	Clobbers C
B8 ... CLV × 3 50 00 BVC *+2	Clobbers V
EA ... NOP × 3 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 3 04 04 NOP $04	Requires support for unofficial opcodes
6 bytes
EA ... NOP × 3 4C xx xx JMP *+3	Not relocatable code

• Jumping into the middle of another instruction and thereby reusing code is a very efficient way of reducing code size. Note that all code samples using branches on this page require that no page wrap occurs.

10 cycles

3 bytes
48 PHA 08 PHP 28 PLP	Clobbers S; and writes in stack
EA NOP 68 ... PLA × 2	Clobbers A, S, and Z&N
4 bytes
08 PHP C5 C5 CMP $C5 28 PLP	Writes in stack
26 26 ROL $26 66 26 ROR $26	Clobbers Z&N
5 bytes
EA ... NOP × 5	No requirements

• The ROL-ROR sequence preserves the original value of the memory address. Carry is also preserved.

11 cycles

3 bytes
68 ... PLA × 2 48 PHA	Clobbers A, S, and Z&N
4 bytes
EA ... NOP × 2 08 PHP 28 PLP	Writes in stack
EA ... NOP × 2 68 PLA 48 PHA	Clobbers A, and Z&N
AA TAX 68 PLA 48 PHA 8C TXA	Clobbers X, and Z&N
A8 TAY 68 PLA 48 PHA 98 TYA	Clobbers Y, and Z&N
E6 xx INC @zptemp F6 F6 INC $F6,X	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
5 bytes
E6 xx INC @zptemp EA ... NOP × 3	Clobbers Z&N; and requires @zptemp
EA ... NOP × 2 FE 00 02 INC $0200,X	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 2 FE 00 03 INC $0300,X	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 2 FE 00 04 INC $0400,X	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 2 FE 00 05 INC $0500,X	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 2 FE 00 06 INC $0600,X	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 2 FE 00 07 INC $0700,X	Clobbers Z&N; and requires writable $700-$7FF
6 bytes
18 ... CLC × 4 90 00 BCC *+2	Clobbers C
B8 ... CLV × 4 50 00 BVC *+2	Clobbers V
EA ... NOP × 4 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 4 04 04 NOP $04	Requires support for unofficial opcodes
7 bytes
EA ... NOP × 4 4C xx xx JMP *+3	Not relocatable code

12 cycles

3 bytes
20 xx xx JSR @rts12	Requires @rts12; and writes in stack
68 ... PLA × 3	Clobbers A, S, and Z&N
4 bytes
36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N
08 PHP E6 xx INC @zptemp 28 PLP	Requires @zptemp; and writes in stack
48 ... PHA × 4	Clobbers S; and writes in stack
5 bytes
08 PHP 18 CLC 90 00 BCC *+2 28 PLP	Writes in stack
6 bytes
EA ... NOP × 6	No requirements

• JSR-RTS causes 12 cycles of delay. But it does write a function return address in the stack, which may be unwanted in some applications. S is not modified.
• Again, ROL-ROR does not have side effects (as long as an interrupt does not happen in the middle), except for Z+N.

13 cycles

2 bytes
00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
4 bytes
08 PHP F6 F6 INC $F6,X 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
F6 F6 INC $F6,X 68 PLA 48 PHA	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
48 ... PHA × 2 08 PHP 28 PLP	Clobbers S; and writes in stack
EA NOP 68 ... PLA × 2 48 PHA	Clobbers A, S, and Z&N
5 bytes
EA ... NOP × 3 08 PHP 28 PLP	Writes in stack
EA ... NOP × 3 68 PLA 48 PHA	Clobbers A, and Z&N
EA NOP AA TAX 68 PLA 48 PHA 8C TXA	Clobbers X, and Z&N
EA NOP A8 TAY 68 PLA 48 PHA 98 TYA	Clobbers Y, and Z&N
EA NOP E6 xx INC @zptemp F6 F6 INC $F6,X	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
6 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N, and V
85 xx STA @zptemp 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires @zptemp
EA ... NOP × 3 FE 00 02 INC $0200,X	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 3 FE 00 03 INC $0300,X	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 3 FE 00 04 INC $0400,X	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 3 FE 00 05 INC $0500,X	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 3 FE 00 06 INC $0600,X	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 3 FE 00 07 INC $0700,X	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires support for unofficial opcodes
7 bytes
18 ... CLC × 5 90 00 BCC *+2	Clobbers C
B8 ... CLV × 5 50 00 BVC *+2	Clobbers V
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and not relocatable code
EA ... NOP × 5 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 5 04 04 NOP $04	Requires support for unofficial opcodes
8 bytes
EA ... NOP × 5 4C xx xx JMP *+3	Not relocatable code

14 cycles

3 bytes
20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
4 bytes
08 PHP \ × 2 28 PLP /	Writes in stack
68 PLA \ × 2 48 PHA /	Clobbers A, and Z&N
5 bytes
EA NOP 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N
7 bytes
EA ... NOP × 7	No requirements

15 cycles

3 bytes
20 xx xx JSR @rts15	Requires @rts12, and @rts15; and writes in stack
EA NOP 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
4 bytes
68 PLA 48 PHA 68 ... PLA × 2	Clobbers A, S, and Z&N
48 PHA 20 xx xx JSR @rts12	Clobbers S; requires @rts12; and writes in stack
5 bytes
08 PHP BA TSX 28 PLP 9A TXS 28 PLP	Clobbers X; and writes in stack
68 PLA 48 PHA BA TSX 68 PLA 9A TXS	Clobbers A, X, and Z&N; and unsafe for interrupts
EA NOP 08 PHP F6 F6 INC $F6,X 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
EA NOP F6 F6 INC $F6,X 68 PLA 48 PHA	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
C5 C5 CMP $C5 20 xx xx JSR @rts12	Clobbers Z&N, and C; requires @rts12; and writes in stack
24 24 BIT $24 20 xx xx JSR @rts12	Clobbers Z&N, and V; requires @rts12; and writes in stack
A5 A5 LDA $A5 20 xx xx JSR @rts12	Clobbers A, and Z&N; requires @rts12; and writes in stack
A4 A4 LDY $A4 20 xx xx JSR @rts12	Clobbers Y, and Z&N; requires @rts12; and writes in stack
85 xx STA @zptemp 20 xx xx JSR @rts12	Requires @zptemp, and @rts12; and writes in stack
04 04 NOP $04 20 xx xx JSR @rts12	Requires @rts12, and support for unofficial opcodes; and writes in stack
48 ... PHA × 5	Clobbers S; and writes in stack
AA TAX 68 ... PLA × 2 48 PHA 8C TXA	Clobbers X, S, and Z&N
A8 TAY 68 ... PLA × 2 48 PHA 98 TYA	Clobbers Y, S, and Z&N
6 bytes
08 PHP 28 PLP EA ... NOP × 4	Writes in stack
C5 C5 CMP $C5 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and V
A5 A5 LDA $A5 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers A, and Z&N
A6 A6 LDX $A6 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers X, and Z&N
A4 A4 LDY $A4 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Y, and Z&N
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires @zptemp
04 04 NOP $04 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires support for unofficial opcodes
7 bytes
4C xx xx JMP *+3 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and not relocatable code
FE 00 02 INC $0200,X EA ... NOP × 4	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X EA ... NOP × 4	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X EA ... NOP × 4	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X EA ... NOP × 4	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X EA ... NOP × 4	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X EA ... NOP × 4	Clobbers Z&N; and requires writable $700-$7FF
8 bytes
18 ... CLC × 6 90 00 BCC *+2	Clobbers C
B8 ... CLV × 6 50 00 BVC *+2	Clobbers V
EA ... NOP × 6 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 6 04 04 NOP $04	Requires support for unofficial opcodes
9 bytes
EA ... NOP × 6 4C xx xx JMP *+3	Not relocatable code

16 cycles

3 bytes
48 PHA 00 00 BRK 0	Clobbers S; requires dummy interrupt handler; and writes in stack
4 bytes
EA NOP 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
C5 C5 CMP $C5 00 00 BRK 0	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
24 24 BIT $24 00 00 BRK 0	Clobbers Z&N, and V; requires dummy interrupt handler; and writes in stack
A5 A5 LDA $A5 00 00 BRK 0	Clobbers A, and Z&N; requires dummy interrupt handler; and writes in stack
A6 A6 LDX $A6 00 00 BRK 0	Clobbers X, and Z&N; requires dummy interrupt handler; and writes in stack
A4 A4 LDY $A4 00 00 BRK 0	Clobbers Y, and Z&N; requires dummy interrupt handler; and writes in stack
85 xx STA @zptemp 00 00 BRK 0	Requires @zptemp, and dummy interrupt handler; and writes in stack
04 04 NOP $04 00 00 BRK 0	Requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
68 ... PLA × 4	Clobbers A, S, and Z&N
5 bytes
EA NOP 08 PHP \ × 2 28 PLP /	Writes in stack
EA NOP 68 PLA \ × 2 48 PHA /	Clobbers A, and Z&N
A2 03 LDX #3 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 02 LDY #2 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
6 bytes
EA ... NOP × 2 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N
8 bytes
EA ... NOP × 8	No requirements

17 cycles

3 bytes
68 PLA 00 00 BRK 0	Clobbers A, S, and Z&N; requires dummy interrupt handler; and writes in stack
4 bytes
EA NOP 20 xx xx JSR @rts15	Requires @rts12, and @rts15; and writes in stack
EA ... NOP × 2 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
48 PHA 20 xx xx JSR @rts14	Clobbers S; requires @rts12, and @rts14; and writes in stack
5 bytes
E6 xx INC @zptemp 20 xx xx JSR @rts12	Clobbers Z&N; requires @zptemp, and @rts12; and writes in stack
C5 C5 CMP $C5 20 xx xx JSR @rts14	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
24 24 BIT $24 20 xx xx JSR @rts14	Clobbers Z&N, and V; requires @rts12, and @rts14; and writes in stack
A5 A5 LDA $A5 20 xx xx JSR @rts14	Clobbers A, and Z&N; requires @rts12, and @rts14; and writes in stack
A6 A6 LDX $A6 20 xx xx JSR @rts14	Clobbers X, and Z&N; requires @rts12, and @rts14; and writes in stack
A4 A4 LDY $A4 20 xx xx JSR @rts14	Clobbers Y, and Z&N; requires @rts12, and @rts14; and writes in stack
85 xx STA @zptemp 20 xx xx JSR @rts14	Requires @zptemp, @rts12, and @rts14; and writes in stack
04 04 NOP $04 20 xx xx JSR @rts14	Requires @rts12, @rts14, and support for unofficial opcodes; and writes in stack
48 PHA 08 PHP \ × 2 28 PLP /	Clobbers S; and writes in stack
EA NOP 68 PLA 48 PHA 68 ... PLA × 2	Clobbers A, S, and Z&N
6 bytes
08 PHP 26 26 ROL $26 66 26 ROR $26 28 PLP	Writes in stack
68 PLA 48 PHA 26 26 ROL $26 66 26 ROR $26	Clobbers A, and Z&N
E6 xx INC @zptemp 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires @zptemp
AA TAX EA NOP 68 ... PLA × 2 48 PHA 8C TXA	Clobbers X, S, and Z&N
A8 TAY EA NOP 68 ... PLA × 2 48 PHA 98 TYA	Clobbers Y, S, and Z&N
7 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and V
EA NOP A6 A6 LDX $A6 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers X, and Z&N
EA NOP A4 A4 LDY $A4 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Y, and Z&N
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires support for unofficial opcodes
8 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and not relocatable code
9 bytes
18 ... CLC × 7 90 00 BCC *+2	Clobbers C
B8 ... CLV × 7 50 00 BVC *+2	Clobbers V
EA ... NOP × 7 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 7 04 04 NOP $04	Requires support for unofficial opcodes
10 bytes
EA ... NOP × 7 4C xx xx JMP *+3	Not relocatable code

18 cycles

4 bytes
E6 xx INC @zptemp 00 00 BRK 0	Clobbers Z&N; requires @zptemp, and dummy interrupt handler; and writes in stack
48 PHA 20 xx xx JSR @rts15	Clobbers S; requires @rts12, and @rts15; and writes in stack
68 PLA 20 xx xx JSR @rts14	Clobbers A, S, and Z&N; requires @rts12, and @rts14; and writes in stack
EA NOP 48 PHA 00 00 BRK 0	Clobbers S; requires dummy interrupt handler; and writes in stack
5 bytes
F6 F6 INC $F6,X 20 xx xx JSR @rts12	Clobbers Z&N; requires @zptemp, @rts12, and writable $00-$FF; and writes in stack
EA ... NOP × 2 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
C5 C5 CMP $C5 20 xx xx JSR @rts15	Clobbers Z&N, and C; requires @rts12, and @rts15; and writes in stack
24 24 BIT $24 20 xx xx JSR @rts15	Clobbers Z&N, and V; requires @rts12, and @rts15; and writes in stack
A5 A5 LDA $A5 20 xx xx JSR @rts15	Clobbers A, and Z&N; requires @rts12, and @rts15; and writes in stack
A6 A6 LDX $A6 20 xx xx JSR @rts15	Clobbers X, and Z&N; requires @rts12, and @rts15; and writes in stack
A4 A4 LDY $A4 20 xx xx JSR @rts15	Clobbers Y, and Z&N; requires @rts12, and @rts15; and writes in stack
85 xx STA @zptemp 20 xx xx JSR @rts15	Requires @zptemp, @rts12, and @rts15; and writes in stack
A9 00 LDA #0 20 xx xx JSR delay_256a_16_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks, and delay_256a_16_clocks; and writes in stack
04 04 NOP $04 20 xx xx JSR @rts15	Requires @rts12, @rts15, and support for unofficial opcodes; and writes in stack
18 CLC 90 00 BCC *+2 00 00 BRK 0	Clobbers C; requires dummy interrupt handler; and writes in stack
B8 CLV 50 00 BVC *+2 00 00 BRK 0	Clobbers V; requires dummy interrupt handler; and writes in stack
EA NOP A5 A5 LDA $A5 00 00 BRK 0	Clobbers A, and Z&N; requires dummy interrupt handler; and writes in stack
EA NOP A6 A6 LDX $A6 00 00 BRK 0	Clobbers X, and Z&N; requires dummy interrupt handler; and writes in stack
EA NOP A4 A4 LDY $A4 00 00 BRK 0	Clobbers Y, and Z&N; requires dummy interrupt handler; and writes in stack
EA NOP 85 xx STA @zptemp 00 00 BRK 0	Requires @zptemp, and dummy interrupt handler; and writes in stack
EA NOP 04 04 NOP $04 00 00 BRK 0	Requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
EA NOP 68 ... PLA × 4	Clobbers A, S, and Z&N
48 ... PHA × 2 20 xx xx JSR @rts12	Clobbers S; requires @rts12; and writes in stack
6 bytes
EA ... NOP × 2 08 PHP \ × 2 28 PLP /	Writes in stack
EA ... NOP × 2 68 PLA \ × 2 48 PHA /	Clobbers A, and Z&N
EA NOP A2 03 LDX #3 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 02 LDY #2 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
F6 F6... INC $F6,X× 3	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
7 bytes
EA ... NOP × 3 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N
9 bytes
EA ... NOP × 9	No requirements

19 cycles

4 bytes
F6 F6 INC $F6,X 00 00 BRK 0	Clobbers Z&N; requires @zptemp, dummy interrupt handler, and writable $00-$FF; and writes in stack
68 PLA 20 xx xx JSR @rts15	Clobbers A, S, and Z&N; requires @rts12, and @rts15; and writes in stack
48 ... PHA × 2 00 00 BRK 0	Clobbers S; requires dummy interrupt handler; and writes in stack
5 bytes
08 PHP 28 PLP 20 xx xx JSR @rts12	Requires @rts12; and writes in stack
EA ... NOP × 3 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
68 PLA 48 PHA 68 ... PLA × 3	Clobbers A, S, and Z&N
6 bytes
08 PHP 36 36 ROL $36,X 76 36 ROR $36,X 28 PLP	Writes in stack
68 PLA 48 PHA 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers A, and Z&N
AA TAX 68 PLA 48 PHA 68 ... PLA × 2 8C TXA	Clobbers X, S, and Z&N
A8 TAY 68 PLA 48 PHA 68 ... PLA × 2 98 TYA	Clobbers Y, S, and Z&N
7 bytes
A6 A6 LDX $A6 A2 03 LDX #3 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 02 LDY #2 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires @zptemp
FE 00 02 INC $0200,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $700-$7FF
8 bytes
C5 C5 CMP $C5 EA ... NOP × 2 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and C
24 24 BIT $24 EA ... NOP × 2 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and V
04 04 NOP $04 EA ... NOP × 2 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires support for unofficial opcodes
9 bytes
4C xx xx JMP *+3 EA ... NOP × 2 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and not relocatable code
10 bytes
18 ... CLC × 8 90 00 BCC *+2	Clobbers C
B8 ... CLV × 8 50 00 BVC *+2	Clobbers V
EA ... NOP × 8 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 8 04 04 NOP $04	Requires support for unofficial opcodes
11 bytes
EA ... NOP × 8 4C xx xx JMP *+3	Not relocatable code

20 cycles

4 bytes
08 PHP 28 PLP 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
5 bytes
A9 2A LDA #$2A ;hides 'ROL A' 18 CLC 10 FC BPL *-2	Clobbers A, Z&N, and C
E6 xx INC @zptemp 20 xx xx JSR @rts15	Clobbers Z&N; requires @zptemp, @rts12, and @rts15; and writes in stack
F6 F6 INC $F6,X 20 xx xx JSR @rts14	Clobbers Z&N; requires @zptemp, @rts12, @rts14, and writable $00-$FF; and writes in stack
68 ... PLA × 5	Clobbers A, S, and Z&N
48 ... PHA × 2 20 xx xx JSR @rts14	Clobbers S; requires @rts12, and @rts14; and writes in stack
EA NOP 48 PHA 20 xx xx JSR @rts15	Clobbers S; requires @rts12, and @rts15; and writes in stack
6 bytes
BA TSX 68 ... PLA × 4 9A TXS	Clobbers A, X, and Z&N; and unsafe for interrupts
08 PHP 48 PHA F6 F6 INC $F6,X 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
F6 F6 INC $F6,X 68 PLA \ × 2 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
EA ... NOP × 3 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
18 CLC 90 00 BCC *+2 20 xx xx JSR @rts15	Clobbers C; requires @rts12, and @rts15; and writes in stack
B8 CLV 50 00 BVC *+2 20 xx xx JSR @rts15	Clobbers V; requires @rts12, and @rts15; and writes in stack
EA NOP A5 A5 LDA $A5 20 xx xx JSR @rts15	Clobbers A, and Z&N; requires @rts12, and @rts15; and writes in stack
EA NOP A6 A6 LDX $A6 20 xx xx JSR @rts15	Clobbers X, and Z&N; requires @rts12, and @rts15; and writes in stack
EA NOP A4 A4 LDY $A4 20 xx xx JSR @rts15	Clobbers Y, and Z&N; requires @rts12, and @rts15; and writes in stack
EA NOP 85 xx STA @zptemp 20 xx xx JSR @rts15	Requires @zptemp, @rts12, and @rts15; and writes in stack
EA NOP 04 04 NOP $04 20 xx xx JSR @rts15	Requires @rts12, @rts15, and support for unofficial opcodes; and writes in stack
48 ... PHA × 2 08 PHP \ × 2 28 PLP /	Clobbers S; and writes in stack
AA TAX 68 ... PLA × 4 8C TXA	Clobbers X, S, and Z&N
A8 TAY 68 ... PLA × 4 98 TYA	Clobbers Y, S, and Z&N
7 bytes
EA ... NOP × 3 08 PHP \ × 2 28 PLP /	Writes in stack
98 TYA A0 02 LDY #2 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 03 LDX #3 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 02 LDY #2 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
EA NOP F6 F6... INC $F6,X× 3	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
8 bytes
26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N
10 bytes
EA ... NOP × 10	No requirements

21 cycles

4 bytes
68 ... PLA × 2 00 00 BRK 0	Clobbers A, S, and Z&N; requires dummy interrupt handler; and writes in stack
5 bytes
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1	Clobbers A, Z&N, and C
A2 04 LDX #4 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
08 PHP 28 PLP 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
F6 F6 INC $F6,X 20 xx xx JSR @rts15	Clobbers Z&N; requires @zptemp, @rts12, @rts15, and writable $00-$FF; and writes in stack
EA NOP F6 F6 INC $F6,X 00 00 BRK 0	Clobbers Z&N; requires @zptemp, dummy interrupt handler, and writable $00-$FF; and writes in stack
48 ... PHA × 2 20 xx xx JSR @rts15	Clobbers S; requires @rts12, and @rts15; and writes in stack
EA NOP 48 ... PHA × 2 00 00 BRK 0	Clobbers S; requires dummy interrupt handler; and writes in stack
6 bytes
08 PHP \ × 3 28 PLP /	Writes in stack
68 PLA \ × 3 48 PHA /	Clobbers A, and Z&N
8 bytes
EA ... NOP × 2 E6 xx INC @zptemp 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires @zptemp
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $700-$7FF
9 bytes
C5 C5 CMP $C5 EA ... NOP × 3 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and C
24 24 BIT $24 EA ... NOP × 3 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and V
04 04 NOP $04 EA ... NOP × 3 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires support for unofficial opcodes
10 bytes
4C xx xx JMP *+3 EA ... NOP × 3 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and not relocatable code
11 bytes
18 ... CLC × 9 90 00 BCC *+2	Clobbers C
B8 ... CLV × 9 50 00 BVC *+2	Clobbers V
EA ... NOP × 9 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 9 04 04 NOP $04	Requires support for unofficial opcodes
12 bytes
EA ... NOP × 9 4C xx xx JMP *+3	Not relocatable code

22 cycles

5 bytes
08 PHP 28 PLP 20 xx xx JSR @rts15	Requires @rts12, and @rts15; and writes in stack
EA NOP 08 PHP 28 PLP 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
68 ... PLA × 2 20 xx xx JSR @rts14	Clobbers A, S, and Z&N; requires @rts12, and @rts14; and writes in stack
6 bytes
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 38 SEC 10 FC BPL *-2	Clobbers A, Z&N, and C
A2 03 LDX #3 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 02 LDY #2 EA NOP 88 DEY 10 FC BPL *-2	Clobbers Y, and Z&N
EA NOP F6 F6 INC $F6,X 20 xx xx JSR @rts14	Clobbers Z&N; requires @zptemp, @rts12, @rts14, and writable $00-$FF; and writes in stack
EA NOP 68 ... PLA × 5	Clobbers A, S, and Z&N
48 PHA 08 PHP 28 PLP 20 xx xx JSR @rts12	Clobbers S; requires @rts12; and writes in stack
7 bytes
08 PHP BA TSX 08 PHP 28 ... PLP × 2 9A TXS 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP 48 PHA F6 F6 INC $F6,X 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
EA NOP F6 F6 INC $F6,X 68 PLA \ × 2 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
08 PHP C5 C5 CMP $C5 28 PLP 20 xx xx JSR @rts12	Requires @rts12; and writes in stack
48 PHA 08 PHP 36 36 ROL $36,X 76 36 ROR $36,X 28 PLP	Clobbers S; and writes in stack
8 bytes
08 PHP 24 24 BIT $24 36 36 ROL $36,X 76 36 ROR $36,X 28 PLP	Writes in stack
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N
11 bytes
EA ... NOP × 11	No requirements

23 cycles

5 bytes
A9 2A LDA #$2A ;hides 'ROL A' 48 PHA 10 FC BPL *-2	Clobbers A, S, Z&N, and C; and writes in stack
68 ... PLA × 2 20 xx xx JSR @rts15	Clobbers A, S, and Z&N; requires @rts12, and @rts15; and writes in stack
48 PHA 08 PHP 28 PLP 00 00 BRK 0	Clobbers S; requires dummy interrupt handler; and writes in stack
6 bytes
18 ... CLC × 2 A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1	Clobbers A, Z&N, and C
EA NOP A2 04 LDX #4 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
EA NOP 08 PHP 28 PLP 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
EA NOP F6 F6 INC $F6,X 20 xx xx JSR @rts15	Clobbers Z&N; requires @zptemp, @rts12, @rts15, and writable $00-$FF; and writes in stack
08 PHP C5 C5 CMP $C5 28 PLP 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
68 PLA 48 PHA 68 ... PLA × 4	Clobbers A, S, and Z&N
EA NOP 48 ... PHA × 2 20 xx xx JSR @rts15	Clobbers S; requires @rts12, and @rts15; and writes in stack
7 bytes
EA NOP 08 PHP \ × 3 28 PLP /	Writes in stack
EA NOP 68 PLA \ × 3 48 PHA /	Clobbers A, and Z&N
8 bytes
E6 xx INC @zptemp F6 F6... INC $F6,X× 3	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
9 bytes
E6 xx INC @zptemp EA ... NOP × 3 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires @zptemp
EA ... NOP × 2 FE 00 02 INC $0200,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 2 FE 00 03 INC $0300,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 2 FE 00 04 INC $0400,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 2 FE 00 05 INC $0500,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 2 FE 00 06 INC $0600,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 2 FE 00 07 INC $0700,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $700-$7FF
10 bytes
C5 C5 CMP $C5 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires support for unofficial opcodes
11 bytes
4C xx xx JMP *+3 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and not relocatable code
12 bytes
18 ... CLC × 10 90 00 BCC *+2	Clobbers C
B8 ... CLV × 10 50 00 BVC *+2	Clobbers V
EA ... NOP × 10 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 10 04 04 NOP $04	Requires support for unofficial opcodes
13 bytes
EA ... NOP × 10 4C xx xx JMP *+3	Not relocatable code

24 cycles

4 bytes
A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, Z&N, and C
5 bytes
48 PHA 68 ... PLA × 2 00 00 BRK 0	Clobbers A, S, and Z&N; requires dummy interrupt handler; and writes in stack
6 bytes
20 xx xx JSR @rts12× 2	Requires @rts12; and writes in stack
EA ... NOP × 2 08 PHP 28 PLP 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
68 ... PLA × 6	Clobbers A, S, and Z&N
48 PHA A2 04 LDX #4 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 04 LDX #4 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA 08 PHP \ × 3 28 PLP /	Clobbers S; and writes in stack
8 bytes
08 PHP 48 PHA 26 26 ROL $26 66 26 ROR $26 68 PLA 28 PLP	Writes in stack
36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N
12 bytes
EA ... NOP × 12	No requirements

25 cycles

5 bytes
20 xx xx JSR @rts12 00 00 BRK 0	Requires dummy interrupt handler, and @rts12; and writes in stack
68 ... PLA × 3 00 00 BRK 0	Clobbers A, S, and Z&N; requires dummy interrupt handler; and writes in stack
6 bytes
36 36 ROL $36,X 76 36 ROR $36,X 00 00 BRK 0	Clobbers Z&N; requires dummy interrupt handler; and writes in stack
08 PHP E6 xx INC @zptemp 28 PLP 00 00 BRK 0	Requires @zptemp, and dummy interrupt handler; and writes in stack
68 PLA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1	Clobbers A, S, Z&N, and C
A2 03 LDX #3 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
68 PLA A2 04 LDX #4 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
A0 02 LDY #2 48 PHA 88 DEY 10 FC BPL *-2	Clobbers Y, S, and Z&N; and writes in stack
68 PLA A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
48 PHA 08 PHP 28 PLP 20 xx xx JSR @rts15	Clobbers S; requires @rts12, and @rts15; and writes in stack
48 PHA 68 ... PLA × 2 20 xx xx JSR @rts14	Clobbers A, S, and Z&N; requires @rts12, and @rts14; and writes in stack
48 ... PHA × 4 00 00 BRK 0	Clobbers S; requires dummy interrupt handler; and writes in stack
7 bytes
98 TYA A0 04 LDY #4 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 04 LDX #4 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
20 xx xx JSR @rts12 08 PHP F6 F6 INC $F6,X 28 PLP	Requires @zptemp, @rts12, and writable $00-$FF; and writes in stack
EA ... NOP × 2 08 PHP 28 PLP 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
08 PHP C5 C5 CMP $C5 28 PLP 20 xx xx JSR @rts15	Requires @rts12, and @rts15; and writes in stack
48 PHA A9 00 LDA #0 20 xx xx JSR delay_256a_16_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks, and delay_256a_16_clocks; and writes in stack
08 PHP A9 00 LDA #0 20 xx xx JSR delay_256a_16_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks, and delay_256a_16_clocks; and writes in stack
EA NOP 08 PHP C5 C5 CMP $C5 28 PLP 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 08 PHP 28 PLP 20 xx xx JSR @rts12	Clobbers S; requires @rts12; and writes in stack
8 bytes
EA ... NOP × 2 08 PHP \ × 3 28 PLP /	Writes in stack
9 bytes
EA NOP E6 xx INC @zptemp F6 F6... INC $F6,X× 3	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
85 xx STA @zptemp 68 PLA 48 PHA 68 ... PLA × 3 A5 xx LDA @zptemp	Clobbers S, and Z&N; and requires @zptemp
10 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N, and V
E6 xx INC @zptemp 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires @zptemp
EA ... NOP × 3 FE 00 02 INC $0200,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 3 FE 00 03 INC $0300,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 3 FE 00 04 INC $0400,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 3 FE 00 05 INC $0500,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 3 FE 00 06 INC $0600,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 3 FE 00 07 INC $0700,X 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires support for unofficial opcodes
11 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and not relocatable code
13 bytes
18 ... CLC × 11 90 00 BCC *+2	Clobbers C
B8 ... CLV × 11 50 00 BVC *+2	Clobbers V
EA ... NOP × 11 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 11 04 04 NOP $04	Requires support for unofficial opcodes
14 bytes
EA ... NOP × 11 4C xx xx JMP *+3	Not relocatable code

26 cycles

4 bytes
00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
5 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, Z&N, and C
A2 05 LDX #5 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 04 LDY #4 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
6 bytes
20 xx xx JSR @rts12 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
48 PHA 68 ... PLA × 2 20 xx xx JSR @rts15	Clobbers A, S, and Z&N; requires @rts12, and @rts15; and writes in stack
7 bytes
EA NOP 20 xx xx JSR @rts12× 2	Requires @rts12; and writes in stack
EA NOP 68 ... PLA × 6	Clobbers A, S, and Z&N
8 bytes
08 PHP 48 PHA 36 36 ROL $36,X 76 36 ROR $36,X 68 PLA 28 PLP	Writes in stack
98 TYA A0 02 LDY #2 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
EA NOP 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N
13 bytes
EA ... NOP × 13	No requirements

27 cycles

5 bytes
A9 00 LDA #0 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 20 xx xx JSR @rts14	Requires dummy interrupt handler, @rts12, and @rts14; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, S, Z&N, and C; and writes in stack
6 bytes
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, Z&N, and C
20 xx xx JSR @rts12 20 xx xx JSR @rts15	Requires @rts12, and @rts15; and writes in stack
00 00 BRK 0 08 PHP \ × 2 28 PLP /	Requires dummy interrupt handler; and writes in stack
7 bytes
48 PHA A9 2A LDA #$2A ;hides 'ROL A' 18 CLC 10 FC BPL *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 2A LDA #$2A ;hides 'ROL A' 18 CLC 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
C5 CD CMP <$CD ;hides 'CMP $7DA2' A2 7D LDX #125 E8 INX 10 FA BPL *-4	Clobbers X, Z&N, and C
24 2C BIT <$2C ;hides 'BIT $03A2' A2 03 LDX #3 CA DEX D0 FA BNE *-4	Clobbers X, Z&N, and V
A5 AD LDA <$AD ;hides 'LDA $82A2' A2 82 LDX #130 CA DEX 30 FA BMI *-4	Clobbers A, X, and Z&N
C5 CD CMP <$CD ;hides 'CMP $7DA0' A0 7D LDY #125 C8 INY 10 FA BPL *-4	Clobbers Y, Z&N, and C
24 2C BIT <$2C ;hides 'BIT $FDA0' A0 FD LDY #253 C8 INY D0 FA BNE *-4	Clobbers Y, Z&N, and V
A5 AD LDA <$AD ;hides 'LDA $03A0' A0 03 LDY #3 88 DEY D0 FA BNE *-4	Clobbers A, Y, and Z&N
A4 AC LDY <$AC ;hides 'LDY $03A2' A2 03 LDX #3 CA DEX D0 FA BNE *-4	Clobbers X, Y, and Z&N
A2 04 LDX #4 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 04 LDX #4 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 04 LDY #4 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
08 PHP F6 F6 INC $F6,X 28 PLP 20 xx xx JSR @rts14	Requires @zptemp, @rts12, @rts14, and writable $00-$FF; and writes in stack
04 0C NOP <$0C ;hides 'NOP $7DA2' A2 7D LDX #125 E8 INX 10 FA BPL *-4	Clobbers X, and Z&N; and requires support for unofficial opcodes
04 0C NOP <$0C ;hides 'NOP $7DA0' A0 7D LDY #125 C8 INY 10 FA BPL *-4	Clobbers Y, and Z&N; and requires support for unofficial opcodes
68 PLA 48 PHA 68 ... PLA × 5	Clobbers A, S, and Z&N
48 ... PHA × 2 A2 04 LDX #4 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 ... PHA × 2 A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
48 PHA 20 xx xx JSR @rts12× 2	Clobbers S; requires @rts12; and writes in stack
8 bytes
EA NOP 98 TYA A0 04 LDY #4 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 04 LDX #4 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 04 LDY #4 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
08 PHP F6 F6 INC $F6,X 28 PLP \ × 2 08 PHP / 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
24 24 BIT $24 20 xx xx JSR @rts12× 2	Clobbers Z&N, and V; requires @rts12; and writes in stack
20 xx xx JSR @rts12 08 PHP BA TSX 28 PLP 9A TXS 28 PLP	Clobbers X; requires @rts12; and writes in stack
85 xx STA @zptemp 20 xx xx JSR @rts12× 2	Requires @zptemp, and @rts12; and writes in stack
EA ... NOP × 3 08 PHP 28 PLP 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
04 04 NOP $04 20 xx xx JSR @rts12× 2	Requires @rts12, and support for unofficial opcodes; and writes in stack
48 ... PHA × 2 08 PHP \ × 3 28 PLP /	Clobbers S; and writes in stack
9 bytes
08 PHP 48 PHA A9 6A LDA #$6A ;hides 'ROR A' 38 SEC 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A0 04 LDY #4 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
10 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
11 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
FE 00 02 INC $0200,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $700-$7FF
14 bytes
18 ... CLC × 12 90 00 BCC *+2	Clobbers C
B8 ... CLV × 12 50 00 BVC *+2	Clobbers V
EA ... NOP × 12 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 12 04 04 NOP $04	Requires support for unofficial opcodes
15 bytes
EA ... NOP × 12 4C xx xx JMP *+3	Not relocatable code

28 cycles

5 bytes
A9 01 LDA #1 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
EA NOP 00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, S, Z&N, and C
6 bytes
18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, Z&N, and C
EA NOP A2 05 LDX #5 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 04 LDY #4 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
20 xx xx JSR @rts14× 2	Requires @rts12, and @rts14; and writes in stack
7 bytes
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1 28 PLP	Clobbers A; and writes in stack
08 PHP A2 04 LDX #4 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 04 LDY #4 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP F6 F6 INC $F6,X 28 PLP 20 xx xx JSR @rts15	Requires @zptemp, @rts12, @rts15, and writable $00-$FF; and writes in stack
68 ... PLA × 7	Clobbers A, S, and Z&N
48 ... PHA × 2 08 PHP 28 PLP 20 xx xx JSR @rts15	Clobbers S; requires @rts12, and @rts15; and writes in stack
8 bytes
08 PHP \ × 4 28 PLP /	Writes in stack
68 PLA \ × 4 48 PHA /	Clobbers A, and Z&N
10 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N
14 bytes
EA ... NOP × 14	No requirements

29 cycles

5 bytes
A9 02 LDA #2 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
48 PHA 00 00... BRK 0 × 2	Clobbers S; requires dummy interrupt handler; and writes in stack
6 bytes
18 CLC A9 2A LDA #$2A ;hides 'ROL A' EA NOP 90 FC BCC *-2	Clobbers A, Z&N, and C
A2 04 LDX #4 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 04 LDY #4 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
20 xx xx JSR @rts14 20 xx xx JSR @rts15	Requires @rts12, @rts14, and @rts15; and writes in stack
C5 C5 CMP $C5 00 00... BRK 0 × 2	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
24 24 BIT $24 00 00... BRK 0 × 2	Clobbers Z&N, and V; requires dummy interrupt handler; and writes in stack
A5 A5 LDA $A5 00 00... BRK 0 × 2	Clobbers A, and Z&N; requires dummy interrupt handler; and writes in stack
85 xx STA @zptemp 00 00... BRK 0 × 2	Requires @zptemp, and dummy interrupt handler; and writes in stack
EA NOP 00 00 BRK 0 20 xx xx JSR @rts14	Requires dummy interrupt handler, @rts12, and @rts14; and writes in stack
04 04 NOP $04 00 00... BRK 0 × 2	Requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
7 bytes
EA NOP 20 xx xx JSR @rts12 20 xx xx JSR @rts15	Requires @rts12, and @rts15; and writes in stack
EA NOP 00 00 BRK 0 08 PHP \ × 2 28 PLP /	Requires dummy interrupt handler; and writes in stack
48 PHA 20 xx xx JSR @rts12 20 xx xx JSR @rts14	Clobbers S; requires @rts12, and @rts14; and writes in stack
8 bytes
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 38 SEC 10 FC BPL *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 38 SEC 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A2 03 LDX #3 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 02 LDY #2 EA NOP 88 DEY 10 FC BPL *-2 28 PLP	Clobbers Y; and writes in stack
E6 xx INC @zptemp 20 xx xx JSR @rts12× 2	Clobbers Z&N; requires @zptemp, and @rts12; and writes in stack
24 24 BIT $24 20 xx xx JSR @rts12 20 xx xx JSR @rts14	Clobbers Z&N, and V; requires @rts12, and @rts14; and writes in stack
85 xx STA @zptemp 20 xx xx JSR @rts12 20 xx xx JSR @rts14	Requires @zptemp, @rts12, and @rts14; and writes in stack
04 04 NOP $04 20 xx xx JSR @rts12 20 xx xx JSR @rts14	Requires @rts12, @rts14, and support for unofficial opcodes; and writes in stack
68 PLA 98 TYA A0 04 LDY #4 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
EA NOP 48 PHA 20 xx xx JSR @rts12× 2	Clobbers S; requires @rts12; and writes in stack
9 bytes
EA ... NOP × 2 98 TYA A0 04 LDY #4 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA NOP 08 PHP F6 F6 INC $F6,X 28 PLP \ × 2 08 PHP / 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
20 xx xx JSR @rts12 08 PHP 26 26 ROL $26 66 26 ROR $26 28 PLP	Requires @rts12; and writes in stack
48 PHA 08 PHP 48 PHA 36 36 ROL $36,X 76 36 ROR $36,X 68 PLA 28 PLP	Clobbers S; and writes in stack
10 bytes
08 PHP 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 28 PLP	Writes in stack
E6 xx INC @zptemp 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
11 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
12 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
15 bytes
18 ... CLC × 13 90 00 BCC *+2	Clobbers C
B8 ... CLV × 13 50 00 BVC *+2	Clobbers V
EA ... NOP × 13 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 13 04 04 NOP $04	Requires support for unofficial opcodes
16 bytes
EA ... NOP × 13 4C xx xx JMP *+3	Not relocatable code

30 cycles

5 bytes
A9 03 LDA #3 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
68 PLA 00 00... BRK 0 × 2	Clobbers A, S, and Z&N; requires dummy interrupt handler; and writes in stack
6 bytes
F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
20 xx xx JSR @rts15× 2	Requires @rts12, and @rts15; and writes in stack
EA ... NOP × 2 00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, S, Z&N, and C
68 PLA A2 05 LDX #5 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 04 LDY #4 88 DEY 10 FD BPL *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 05 LDX #5 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 04 LDY #4 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
EA NOP 20 xx xx JSR @rts14× 2	Requires @rts12, and @rts14; and writes in stack
8 bytes
48 PHA 18 ... CLC × 2 A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 ... CLC × 2 A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 04 LDX #4 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 04 LDY #4 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
85 xx STA @zptemp A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 A5 xx LDA @zptemp	Clobbers Z&N, and C; and requires @zptemp
F6 F6 INC $F6,X 20 xx xx JSR @rts12× 2	Clobbers Z&N; requires @zptemp, @rts12, and writable $00-$FF; and writes in stack
48 ... PHA × 2 20 xx xx JSR @rts12× 2	Clobbers S; requires @rts12; and writes in stack
9 bytes
08 PHP 48 PHA 18 CLC A9 6A LDA #$6A ;hides 'ROR A' 90 FD BCC *-1 68 PLA 28 PLP	Writes in stack
10 bytes
F6 F6... INC $F6,X× 5	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
85 xx STA @zptemp 68 ... PLA × 6 A5 xx LDA @zptemp	Clobbers S, and Z&N; and requires @zptemp
11 bytes
EA ... NOP × 3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N
15 bytes
EA ... NOP × 15	No requirements

31 cycles

5 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1	Clobbers A, Z&N, and C
A2 06 LDX #6 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 05 LDY #5 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
6 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A; and writes in stack
E6 xx INC @zptemp 00 00... BRK 0 × 2	Clobbers Z&N; requires @zptemp, and dummy interrupt handler; and writes in stack
EA NOP 48 PHA 00 00... BRK 0 × 2	Clobbers S; requires dummy interrupt handler; and writes in stack
7 bytes
EA NOP 20 xx xx JSR @rts14 20 xx xx JSR @rts15	Requires @rts12, @rts14, and @rts15; and writes in stack
18 CLC 90 00 BCC *+2 00 00... BRK 0 × 2	Clobbers C; requires dummy interrupt handler; and writes in stack
B8 CLV 50 00 BVC *+2 00 00... BRK 0 × 2	Clobbers V; requires dummy interrupt handler; and writes in stack
EA NOP 85 xx STA @zptemp 00 00... BRK 0 × 2	Requires @zptemp, and dummy interrupt handler; and writes in stack
EA ... NOP × 2 00 00 BRK 0 20 xx xx JSR @rts14	Requires dummy interrupt handler, @rts12, and @rts14; and writes in stack
EA NOP 04 04 NOP $04 00 00... BRK 0 × 2	Requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
48 PHA 20 xx xx JSR @rts14× 2	Clobbers S; requires @rts12, and @rts14; and writes in stack
8 bytes
08 PHP 28 PLP 20 xx xx JSR @rts12× 2	Requires @rts12; and writes in stack
EA ... NOP × 2 00 00 BRK 0 08 PHP \ × 2 28 PLP /	Requires dummy interrupt handler; and writes in stack
68 PLA 48 PHA 68 ... PLA × 6	Clobbers A, S, and Z&N
48 PHA 08 PHP A2 04 LDX #4 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 04 LDY #4 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
8C TXA 24 2C BIT <$2C ;hides 'BIT $03A2' A2 03 LDX #3 CA DEX D0 FA BNE *-4 AA TAX	Clobbers A, Z&N, and V
08 PHP A6 A6 LDX $A6 A2 04 LDX #4 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 04 LDY #4 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 04 LDX #4 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 04 LDY #4 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
98 TYA 04 0C NOP <$0C ;hides 'NOP $7DA0' A0 7D LDY #125 C8 INY 10 FA BPL *-4 A8 TAY	Clobbers A, and Z&N; and requires support for unofficial opcodes
48 PHA 08 PHP \ × 4 28 PLP /	Clobbers S; and writes in stack
10 bytes
08 PHP 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 28 PLP	Writes in stack
68 PLA 48 PHA 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers A, and Z&N
85 xx STA @zptemp 68 PLA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp
11 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
12 bytes
EA ... NOP × 2 C5 C5 CMP $C5 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and C
EA ... NOP × 2 24 24 BIT $24 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and V
EA ... NOP × 2 04 04 NOP $04 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
13 bytes
EA ... NOP × 2 4C xx xx JMP *+3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
16 bytes
18 ... CLC × 14 90 00 BCC *+2	Clobbers C
B8 ... CLV × 14 50 00 BVC *+2	Clobbers V
EA ... NOP × 14 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 14 04 04 NOP $04	Requires support for unofficial opcodes
17 bytes
EA ... NOP × 14 4C xx xx JMP *+3	Not relocatable code

32 cycles

5 bytes
A9 05 LDA #5 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 05 LDX #5 ;hides 'ORA zp' CA DEX ;first loop only CA DEX D0 FB BNE *-3	Clobbers A, X, and Z&N
A0 05 LDY #5 ;hides 'ORA zp' 88 DEY ;first loop only 88 DEY D0 FB BNE *-3	Clobbers A, Y, and Z&N
F6 F6 INC $F6,X 00 00... BRK 0 × 2	Clobbers Z&N; requires @zptemp, dummy interrupt handler, and writable $00-$FF; and writes in stack
68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, S, Z&N, and C
48 ... PHA × 2 00 00... BRK 0 × 2	Clobbers S; requires dummy interrupt handler; and writes in stack
7 bytes
A9 2A LDA #$2A ;hides 'ROL A' EA ... NOP × 3 10 FA BPL *-4	Clobbers A, Z&N, and C
A2 05 LDX #5 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 05 LDX #5 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 05 LDY #5 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 04 LDY #4 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
EA NOP 20 xx xx JSR @rts15× 2	Requires @rts12, and @rts15; and writes in stack
AA TAX A9 01 LDA #1 20 xx xx JSR delay_a_25_clocks 8C TXA	Clobbers X, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
A8 TAY A9 01 LDA #1 20 xx xx JSR delay_a_25_clocks 98 TYA	Clobbers Y, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
A2 7A LDX #122 ;hides 'NOP' EA NOP E8 ... INX × 2 10 FA BPL *-4	Clobbers X, and Z&N; and requires support for unofficial opcodes
A0 FA LDY #250 ;hides 'NOP' EA NOP C8 ... INY × 2 D0 FA BNE *-4	Clobbers Y, and Z&N; and requires support for unofficial opcodes
EA ... NOP × 3 00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 A2 05 LDX #5 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
AA TAX 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 8C TXA	Clobbers X, S, Z&N, and C
48 ... PHA × 2 A0 04 LDY #4 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
A8 TAY 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 98 TYA	Clobbers Y, S, Z&N, and C
68 PLA 20 xx xx JSR @rts14× 2	Clobbers A, S, and Z&N; requires @rts12, and @rts14; and writes in stack
8 bytes
EA NOP 98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
A6 A6 LDX $A6 A2 04 LDX #4 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 04 LDY #4 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
EA ... NOP × 2 20 xx xx JSR @rts14× 2	Requires @rts12, and @rts14; and writes in stack
9 bytes
48 PHA 98 TYA A0 04 LDY #4 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 04 LDY #4 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
08 PHP A2 03 LDX #3 24 24 BIT $24 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 02 LDY #2 24 24 BIT $24 88 DEY 10 FB BPL *-3 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 04 LDY #4 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 28 PLP 20 xx xx JSR @rts12 08 PHP F6 F6 INC $F6,X 28 PLP	Requires @zptemp, @rts12, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 00 LDA #0 20 xx xx JSR delay_256a_16_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks, and delay_256a_16_clocks; and writes in stack
EA NOP 48 ... PHA × 2 20 xx xx JSR @rts12× 2	Clobbers S; requires @rts12; and writes in stack
10 bytes
08 PHP 48 PHA 18 ... CLC × 2 A9 6A LDA #$6A ;hides 'ROR A' 90 FD BCC *-1 68 PLA 28 PLP	Writes in stack
12 bytes
36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N
16 bytes
EA ... NOP × 16	No requirements

33 cycles

5 bytes
A9 06 LDA #6 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1	Clobbers A, Z&N, and C
EA NOP A2 06 LDX #6 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 05 LDY #5 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
08 PHP 28 PLP 00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
7 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A; and writes in stack
08 PHP A2 05 LDX #5 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 04 LDY #4 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA 20 xx xx JSR @rts15× 2	Clobbers S; requires @rts12, and @rts15; and writes in stack
8 bytes
98 TYA A0 04 LDY #4 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
08 PHP 28 PLP 20 xx xx JSR @rts12 20 xx xx JSR @rts14	Requires @rts12, and @rts14; and writes in stack
24 24 BIT $24 20 xx xx JSR @rts15× 2	Clobbers Z&N, and V; requires @rts12, and @rts15; and writes in stack
85 xx STA @zptemp 20 xx xx JSR @rts15× 2	Requires @zptemp, @rts12, and @rts15; and writes in stack
04 04 NOP $04 20 xx xx JSR @rts15× 2	Requires @rts12, @rts15, and support for unofficial opcodes; and writes in stack
9 bytes
EA NOP 08 PHP 28 PLP 20 xx xx JSR @rts12× 2	Requires @rts12; and writes in stack
10 bytes
08 PHP \ × 2 28 PLP / 08 PHP 36 36 ROL $36,X 76 36 ROR $36,X 28 PLP	Writes in stack
C5 C5 CMP $C5 85 xx STA @zptemp A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 A5 xx LDA @zptemp	Clobbers Z&N, and C; and requires @zptemp
11 bytes
86 xx STX @zptemp 24 2C BIT <$2C ;hides 'BIT $03A2' A2 03 LDX #3 CA DEX D0 FA BNE *-4 A6 xx LDX @zptemp	Clobbers Z&N, and V; and requires @zptemp
84 xx STY @zptemp A0 04 LDY #4 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 04 LDY #4 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
84 xx STY @zptemp 04 0C NOP <$0C ;hides 'NOP $7DA0' A0 7D LDY #125 C8 INY 10 FA BPL *-4 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
85 xx STA @zptemp 68 PLA 48 PHA 68 ... PLA × 5 A5 xx LDA @zptemp	Clobbers S, and Z&N; and requires @zptemp
12 bytes
EA ... NOP × 2 E6 xx INC @zptemp 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
13 bytes
C5 C5 CMP $C5 EA ... NOP × 3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 EA ... NOP × 3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 EA ... NOP × 3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
14 bytes
4C xx xx JMP *+3 EA ... NOP × 3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
17 bytes
18 ... CLC × 15 90 00 BCC *+2	Clobbers C
B8 ... CLV × 15 50 00 BVC *+2	Clobbers V
EA ... NOP × 15 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 15 04 04 NOP $04	Requires support for unofficial opcodes
18 bytes
EA ... NOP × 15 4C xx xx JMP *+3	Not relocatable code

34 cycles

5 bytes
A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2	Clobbers A, Z&N, and C
A0 88 LDY #136 ;hides 'DEY' 88 DEY 30 FC BMI *-2	Clobbers Y, and Z&N
6 bytes
48 PHA A2 06 LDX #6 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
68 ... PLA × 2 00 00... BRK 0 × 2	Clobbers A, S, and Z&N; requires dummy interrupt handler; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 06 LDX #6 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
48 PHA A9 00 LDA #0 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 00 LDA #0 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
EA NOP F6 F6 INC $F6,X 00 00... BRK 0 × 2	Clobbers Z&N; requires @zptemp, dummy interrupt handler, and writable $00-$FF; and writes in stack
08 PHP 28 PLP 00 00 BRK 0 20 xx xx JSR @rts14	Requires dummy interrupt handler, @rts12, and @rts14; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A, and S; and writes in stack
EA NOP 48 ... PHA × 2 00 00... BRK 0 × 2	Clobbers S; requires dummy interrupt handler; and writes in stack
8 bytes
C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 20 xx xx JSR @rts15× 2	Requires @rts12, and @rts15; and writes in stack
F6 F6 INC $F6,X 20 xx xx JSR @rts14× 2	Clobbers Z&N; requires @zptemp, @rts12, @rts14, and writable $00-$FF; and writes in stack
EA ... NOP × 4 00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
68 PLA 98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
48 ... PHA × 2 20 xx xx JSR @rts14× 2	Clobbers S; requires @rts12, and @rts14; and writes in stack
9 bytes
08 PHP 48 PHA A9 2A LDA #$2A ;hides 'ROL A' 18 CLC 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
85 xx STA @zptemp 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp
10 bytes
EA NOP 84 xx STY @zptemp A0 04 LDY #4 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N
17 bytes
EA ... NOP × 17	No requirements

35 cycles

5 bytes
A9 08 LDA #8 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 10 FB BPL *-3	Clobbers A, Z&N, and C; and writes in stack
A2 F8 LDX #248 ;hides 'SED' E8 ... INX × 2 D0 FB BNE *-3	Clobbers X, Z&N, and D
A0 88 LDY #136 ;hides 'DEY' 88 ... DEY × 2 30 FB BMI *-3	Clobbers Y, and Z&N
68 PLA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1	Clobbers A, S, Z&N, and C
68 PLA A2 06 LDX #6 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
7 bytes
98 TYA A0 05 LDY #5 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 06 LDX #6 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
48 PHA A9 01 LDA #1 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 01 LDA #1 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
EA NOP 08 PHP 28 PLP 00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
8 bytes
48 PHA 18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 05 LDX #5 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 04 LDY #4 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 28 PLP 20 xx xx JSR @rts14× 2	Requires @rts12, and @rts14; and writes in stack
E6 xx INC @zptemp 20 xx xx JSR @rts15× 2	Clobbers Z&N; requires @zptemp, @rts12, and @rts15; and writes in stack
EA NOP 48 PHA 20 xx xx JSR @rts15× 2	Clobbers S; requires @rts12, and @rts15; and writes in stack
9 bytes
08 PHP 48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1 68 PLA 28 PLP	Writes in stack
10 bytes
84 xx STY @zptemp A0 04 LDY #4 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
13 bytes
EA ... NOP × 2 FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 2 FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 2 FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 2 FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 2 FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 2 FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
14 bytes
C5 C5 CMP $C5 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N, and V
04 04 NOP $04 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires support for unofficial opcodes
15 bytes
4C xx xx JMP *+3 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and not relocatable code
18 bytes
18 ... CLC × 16 90 00 BCC *+2	Clobbers C
B8 ... CLV × 16 50 00 BVC *+2	Clobbers V
EA ... NOP × 16 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 16 04 04 NOP $04	Requires support for unofficial opcodes
19 bytes
EA ... NOP × 16 4C xx xx JMP *+3	Not relocatable code

36 cycles

5 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V
A2 06 LDX #6 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
6 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2	Clobbers A, Z&N, and C
7 bytes
48 PHA A9 02 LDA #2 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 02 LDA #2 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 08 PHP 28 PLP 00 00... BRK 0 × 2	Clobbers S; requires dummy interrupt handler; and writes in stack
8 bytes
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' EA NOP 90 FC BCC *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 2A LDA #$2A ;hides 'ROL A' EA NOP 90 FC BCC *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A2 04 LDX #4 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 04 LDY #4 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
F6 F6 INC $F6,X 20 xx xx JSR @rts15× 2	Clobbers Z&N; requires @zptemp, @rts12, @rts15, and writable $00-$FF; and writes in stack
08 PHP 28 PLP 20 xx xx JSR @rts14 20 xx xx JSR @rts15	Requires @rts12, @rts14, and @rts15; and writes in stack
08 PHP C5 C5 CMP $C5 28 PLP 00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 20 xx xx JSR @rts15× 2	Clobbers S; requires @rts12, and @rts15; and writes in stack
9 bytes
8C TXA A2 05 LDX #5 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 05 LDY #5 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
20 xx xx JSR @rts12× 3	Requires @rts12; and writes in stack
98 TYA A0 FA LDY #250 ;hides 'NOP' EA NOP C8 ... INY × 2 D0 FA BNE *-4 A8 TAY	Clobbers A, and Z&N; and requires support for unofficial opcodes
EA NOP 68 PLA 98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
08 PHP 48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 38 SEC 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
A5 A5 LDA $A5 98 TYA A0 04 LDY #4 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
F6 F6 INC $F6,X 85 xx STA @zptemp A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 A5 xx LDA @zptemp	Clobbers Z&N, and C; and requires @zptemp, and writable $00-$FF
85 xx STA @zptemp EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp
11 bytes
EA ... NOP × 2 84 xx STY @zptemp A0 04 LDY #4 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N
18 bytes
EA ... NOP × 18	No requirements

37 cycles

5 bytes
A9 0A LDA #10 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
00 00 BRK 0 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2	Clobbers A, S, Z&N, and C; and writes in stack
A2 04 LDX #4 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
48 PHA A0 88 LDY #136 ;hides 'DEY' 88 DEY 30 FC BMI *-2	Clobbers Y, S, and Z&N; and writes in stack
A0 04 LDY #4 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2	Clobbers A, Z&N, and C
A2 04 LDX #4 EA ... NOP × 2 CA DEX D0 FB BNE *-3	Clobbers X, and Z&N
A0 04 LDY #4 EA ... NOP × 2 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N
48 PHA A9 03 LDA #3 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 03 LDA #3 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only 00 00 BRK 0 10 FA BPL *-4	Clobbers A, and Z&N; requires dummy interrupt handler; and writes in stack
8 bytes
EA NOP 98 TYA A0 05 LDY #5 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 28 PLP 20 xx xx JSR @rts15× 2	Requires @rts12, and @rts15; and writes in stack
EA ... NOP × 2 08 PHP 28 PLP 00 00... BRK 0 × 2	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 3 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 ... PHA × 2 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A, and S; and writes in stack
9 bytes
48 PHA 98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 05 LDX #5 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 04 LDY #4 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 05 LDY #5 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
EA NOP 08 PHP 28 PLP 20 xx xx JSR @rts14× 2	Requires @rts12, and @rts14; and writes in stack
10 bytes
08 PHP 48 PHA 18 ... CLC × 2 A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1 68 PLA 28 PLP	Writes in stack
14 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and V
EA ... NOP × 3 FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 3 FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 3 FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 3 FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 3 FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 3 FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
15 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
19 bytes
18 ... CLC × 17 90 00 BCC *+2	Clobbers C
B8 ... CLV × 17 50 00 BVC *+2	Clobbers V
EA ... NOP × 17 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 17 04 04 NOP $04	Requires support for unofficial opcodes
20 bytes
EA ... NOP × 17 4C xx xx JMP *+3	Not relocatable code

38 cycles

5 bytes
A9 0B LDA #11 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
38 SEC A9 69 LDA #$69 ;hides 'ADC #$EA' EA NOP ;first loop only 10 FC BPL *-2	Clobbers A, Z&N, C, and V
EA NOP A2 06 LDX #6 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA NOP A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2	Clobbers A, S, Z&N, and C
7 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1 28 PLP	Clobbers A; and writes in stack
98 TYA A0 88 LDY #136 ;hides 'DEY' 88 DEY 30 FC BMI *-2 A8 TAY	Clobbers A, and Z&N
08 PHP A2 06 LDX #6 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 05 LDY #5 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
20 xx xx JSR @rts12 00 00... BRK 0 × 2	Requires dummy interrupt handler, and @rts12; and writes in stack
8 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
10 bytes
85 xx STA @zptemp 68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp
11 bytes
85 xx STA @zptemp A9 2A LDA #$2A ;hides 'ROL A' EA ... NOP × 3 10 FA BPL *-4 A5 xx LDA @zptemp	Clobbers Z&N, and C; and requires @zptemp
84 xx STY @zptemp A0 05 LDY #5 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 04 LDY #4 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
84 xx STY @zptemp A0 FA LDY #250 ;hides 'NOP' EA NOP C8 ... INY × 2 D0 FA BNE *-4 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
12 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 04 LDX #4 EA NOP CA DEX D0 FC BNE *-2 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
13 bytes
EA NOP 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N
19 bytes
EA ... NOP × 19	No requirements

39 cycles

4 bytes
A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C
6 bytes
00 00... BRK 0 × 3	Requires dummy interrupt handler; and writes in stack
48 PHA A2 06 LDX #6 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 06 LDX #6 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 05 LDA #5 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 05 LDA #5 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
98 TYA A0 88 LDY #136 ;hides 'DEY' 88 ... DEY × 2 30 FB BMI *-3 A8 TAY	Clobbers A, and Z&N
08 PHP A2 05 LDX #5 ;hides 'ORA zp' CA DEX ;first loop only CA DEX D0 FB BNE *-3 28 PLP	Clobbers A, and X; and writes in stack
08 PHP A0 05 LDY #5 ;hides 'ORA zp' 88 DEY ;first loop only 88 DEY D0 FB BNE *-3 28 PLP	Clobbers A, and Y; and writes in stack
9 bytes
48 PHA A9 2A LDA #$2A ;hides 'ROL A' EA ... NOP × 3 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 2A LDA #$2A ;hides 'ROL A' EA ... NOP × 3 10 FA BPL *-4 28 PLP	Clobbers A; and writes in stack
08 PHP A2 05 LDX #5 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 05 LDX #5 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 05 LDY #5 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
08 PHP F6 F6 INC $F6,X A0 04 LDY #4 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
20 xx xx JSR @rts15 20 xx xx JSR @rts12× 2	Requires @rts12, and @rts15; and writes in stack
08 PHP AA TAX A9 01 LDA #1 20 xx xx JSR delay_a_25_clocks 8C TXA 28 PLP	Clobbers X; requires delay_a_25_clocks; and writes in stack
08 PHP A8 TAY A9 01 LDA #1 20 xx xx JSR delay_a_25_clocks 98 TYA 28 PLP	Clobbers Y; requires delay_a_25_clocks; and writes in stack
08 PHP A2 7A LDX #122 ;hides 'NOP' EA NOP E8 ... INX × 2 10 FA BPL *-4 28 PLP	Clobbers X; requires support for unofficial opcodes; and writes in stack
08 PHP A0 FA LDY #250 ;hides 'NOP' EA NOP C8 ... INY × 2 D0 FA BNE *-4 28 PLP	Clobbers Y; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 2 08 PHP A2 05 LDX #5 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 04 LDY #4 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP A6 A6 LDX $A6 A2 04 LDX #4 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 04 LDY #4 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
EA NOP 84 xx STY @zptemp A0 05 LDY #5 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
EA ... NOP × 2 08 PHP 28 PLP 20 xx xx JSR @rts14× 2	Requires @rts12, and @rts14; and writes in stack
48 PHA 20 xx xx JSR @rts12× 3	Clobbers S; requires @rts12; and writes in stack
11 bytes
08 PHP 48 PHA 98 TYA A0 04 LDY #4 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
14 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
15 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
FE 00 02 INC $0200,X 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X 76 36 ROR $36,X 26 26 ROL $26 \ × 2 66 26 ROR $26 /	Clobbers Z&N; and requires writable $700-$7FF
20 bytes
18 ... CLC × 18 90 00 BCC *+2	Clobbers C
B8 ... CLV × 18 50 00 BVC *+2	Clobbers V
EA ... NOP × 18 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 18 04 04 NOP $04	Requires support for unofficial opcodes
21 bytes
EA ... NOP × 18 4C xx xx JMP *+3	Not relocatable code

40 cycles

5 bytes
A9 0D LDA #13 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 05 LDX #5 ;hides 'ORA zp' EA NOP CA DEX D0 FB BNE *-3	Clobbers A, X, and Z&N
A0 05 LDY #5 ;hides 'ORA zp' EA NOP 88 DEY D0 FB BNE *-3	Clobbers A, Y, and Z&N
68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V
7 bytes
98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 06 LDX #6 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 06 LDA #6 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 06 LDA #6 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
00 00... BRK 0 × 2 20 xx xx JSR @rts14	Requires dummy interrupt handler, @rts12, and @rts14; and writes in stack
8 bytes
48 PHA 18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 06 LDX #6 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 05 LDY #5 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
00 00... BRK 0 × 2 08 PHP \ × 2 28 PLP /	Requires dummy interrupt handler; and writes in stack
9 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 88 DEY 30 FC BMI *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
14 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N
20 bytes
EA ... NOP × 20	No requirements

41 cycles

5 bytes
38 SEC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
A2 07 LDX #7 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A0 88 LDY #136 ;hides 'DEY' 88 DEY 30 FC BMI *-2 28 PLP	Clobbers Y; and writes in stack
EA NOP 00 00... BRK 0 × 3	Requires dummy interrupt handler; and writes in stack
8 bytes
48 PHA 08 PHP A2 06 LDX #6 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
9 bytes
98 TYA A0 04 LDY #4 EA ... NOP × 2 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, and Z&N
08 PHP A6 A6 LDX $A6 A2 06 LDX #6 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
20 xx xx JSR @rts12 20 xx xx JSR @rts14 20 xx xx JSR @rts15	Requires @rts12, @rts14, and @rts15; and writes in stack
08 PHP 48 PHA A9 00 LDA #0 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Clobbers S; and writes in stack
10 bytes
08 PHP 48 PHA A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 88 ... DEY × 2 30 FB BMI *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
15 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
16 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
21 bytes
18 ... CLC × 19 90 00 BCC *+2	Clobbers C
B8 ... CLV × 19 50 00 BVC *+2	Clobbers V
EA ... NOP × 19 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 19 04 04 NOP $04	Requires support for unofficial opcodes
22 bytes
EA ... NOP × 19 4C xx xx JMP *+3	Not relocatable code

42 cycles

5 bytes
A9 0F LDA #15 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C; and writes in stack
6 bytes
A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C
7 bytes
EA NOP A2 05 LDX #5 ;hides 'ORA zp' EA NOP CA DEX D0 FB BNE *-3	Clobbers A, X, and Z&N
EA NOP A0 05 LDY #5 ;hides 'ORA zp' EA NOP 88 DEY D0 FB BNE *-3	Clobbers A, Y, and Z&N
A2 07 LDX #7 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 07 LDX #7 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 07 LDY #7 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 08 LDA #8 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 08 LDA #8 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A2 06 LDX #6 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
48 ... PHA × 2 A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
48 PHA 00 00... BRK 0 × 3	Clobbers S; requires dummy interrupt handler; and writes in stack
8 bytes
48 PHA A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
EA NOP 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 F8 LDX #248 ;hides 'SED' E8 ... INX × 2 D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 3 A2 06 LDX #6 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
08 PHP A0 88 LDY #136 ;hides 'DEY' 88 ... DEY × 2 30 FB BMI *-3 28 PLP	Clobbers Y; and writes in stack
EA ... NOP × 3 A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
24 24 BIT $24 00 00... BRK 0 × 3	Clobbers Z&N, and V; requires dummy interrupt handler; and writes in stack
85 xx STA @zptemp 00 00... BRK 0 × 3	Requires @zptemp, and dummy interrupt handler; and writes in stack
EA NOP 00 00... BRK 0 × 2 20 xx xx JSR @rts14	Requires dummy interrupt handler, @rts12, and @rts14; and writes in stack
04 04 NOP $04 00 00... BRK 0 × 3	Requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
9 bytes
48 PHA 98 TYA A0 05 LDY #5 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
84 xx STY @zptemp A0 07 LDY #7 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
20 xx xx JSR @rts14× 3	Requires @rts12, and @rts14; and writes in stack
20 xx xx JSR @rts12 20 xx xx JSR @rts15× 2	Requires @rts12, and @rts15; and writes in stack
08 PHP 48 PHA A9 01 LDA #1 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 00 00... BRK 0 × 2 08 PHP \ × 2 28 PLP /	Requires dummy interrupt handler; and writes in stack
10 bytes
08 PHP 48 PHA 18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
15 bytes
EA ... NOP × 3 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N
21 bytes
EA ... NOP × 21	No requirements

43 cycles

5 bytes
A9 10 LDA #16 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
68 PLA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
6 bytes
38 ... SEC × 2 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C
A2 06 LDX #6 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 05 LDY #5 EA NOP 88 DEY 10 FC BPL *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A2 06 LDX #6 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 07 LDY #7 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
8 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
EA ... NOP × 2 00 00... BRK 0 × 3	Requires dummy interrupt handler; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
20 xx xx JSR @rts15 20 xx xx JSR @rts14× 2	Requires @rts12, @rts14, and @rts15; and writes in stack
08 PHP 48 PHA A9 02 LDA #2 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' EA NOP 90 FC BCC *-2 68 PLA 28 PLP	Writes in stack
11 bytes
84 xx STY @zptemp A0 04 LDY #4 EA ... NOP × 2 88 DEY D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
15 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
16 bytes
EA ... NOP × 2 C5 C5 CMP $C5 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and C
EA ... NOP × 2 24 24 BIT $24 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and V
EA ... NOP × 2 04 04 NOP $04 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
17 bytes
EA ... NOP × 2 4C xx xx JMP *+3 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
22 bytes
18 ... CLC × 20 90 00 BCC *+2	Clobbers C
B8 ... CLV × 20 50 00 BVC *+2	Clobbers V
EA ... NOP × 20 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 20 04 04 NOP $04	Requires support for unofficial opcodes
23 bytes
EA ... NOP × 20 4C xx xx JMP *+3	Not relocatable code

44 cycles

5 bytes
A9 11 LDA #17 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 10 FB BPL *-3	Clobbers A, Z&N, and C
A0 88 LDY #136 ;hides 'DEY' EA NOP 88 DEY 30 FB BMI *-3	Clobbers Y, and Z&N
48 PHA A2 07 LDX #7 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 07 LDX #7 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
48 PHA A9 0A LDA #10 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 0A LDA #10 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
00 00 BRK 0 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
00 00 BRK 0 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
E6 xx INC @zptemp 00 00... BRK 0 × 3	Clobbers Z&N; requires @zptemp, and dummy interrupt handler; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 28 PLP	Clobbers A, and S; and writes in stack
68 PLA 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
48 PHA 08 PHP A0 88 LDY #136 ;hides 'DEY' 88 DEY 30 FC BMI *-2 28 PLP	Clobbers Y, and S; and writes in stack
EA NOP 48 PHA 00 00... BRK 0 × 3	Clobbers S; requires dummy interrupt handler; and writes in stack
9 bytes
C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 04 LDX #4 EA ... NOP × 2 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 04 LDY #4 EA ... NOP × 2 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
20 xx xx JSR @rts14 20 xx xx JSR @rts15× 2	Requires @rts12, @rts14, and @rts15; and writes in stack
08 PHP 48 PHA A9 03 LDA #3 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only 00 00 BRK 0 10 FA BPL *-4 68 PLA	Clobbers Z&N; requires dummy interrupt handler; and writes in stack
18 CLC 90 00 BCC *+2 00 00... BRK 0 × 3	Clobbers C; requires dummy interrupt handler; and writes in stack
B8 CLV 50 00 BVC *+2 00 00... BRK 0 × 3	Clobbers V; requires dummy interrupt handler; and writes in stack
EA NOP 85 xx STA @zptemp 00 00... BRK 0 × 3	Requires @zptemp, and dummy interrupt handler; and writes in stack
EA ... NOP × 2 00 00... BRK 0 × 2 20 xx xx JSR @rts14	Requires dummy interrupt handler, @rts12, and @rts14; and writes in stack
EA NOP 04 04 NOP $04 00 00... BRK 0 × 3	Requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 05 LDY #5 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 84 xx STY @zptemp A0 07 LDY #7 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
EA NOP 20 xx xx JSR @rts14× 3	Requires @rts12, and @rts14; and writes in stack
EA NOP 20 xx xx JSR @rts12 20 xx xx JSR @rts15× 2	Requires @rts12, and @rts15; and writes in stack
EA ... NOP × 2 00 00... BRK 0 × 2 08 PHP \ × 2 28 PLP /	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Clobbers S; and writes in stack
11 bytes
08 PHP 48 PHA 98 TYA A0 04 LDY #4 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
16 bytes
26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N
22 bytes
EA ... NOP × 22	No requirements

45 cycles

5 bytes
A9 12 LDA #18 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
EA NOP 68 PLA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
68 PLA A2 07 LDX #7 CA DEX 10 FD BPL *-1	Clobbers A, X, S, and Z&N
68 PLA A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 07 LDX #7 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 0B LDA #11 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 0B LDA #11 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$EA' EA NOP ;first loop only 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$EA' EA NOP ;first loop only 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 06 LDX #6 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 07 LDY #7 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
85 xx STA @zptemp A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 A5 xx LDA @zptemp	Clobbers Z&N, and C; and requires @zptemp
F6 F6 INC $F6,X 00 00... BRK 0 × 3	Clobbers Z&N; requires @zptemp, dummy interrupt handler, and writable $00-$FF; and writes in stack
48 ... PHA × 2 00 00... BRK 0 × 3	Clobbers S; requires dummy interrupt handler; and writes in stack
9 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1 68 PLA 28 PLP	Writes in stack
11 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 06 LDX #6 CA DEX 10 FD BPL *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
16 bytes
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
17 bytes
EA ... NOP × 3 C5 C5 CMP $C5 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and C
EA ... NOP × 3 24 24 BIT $24 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and V
EA ... NOP × 3 04 04 NOP $04 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
18 bytes
26 26... ROL $26 × 9	Clobbers Z&N
23 bytes
18 ... CLC × 21 90 00 BCC *+2	Clobbers C
B8 ... CLV × 21 50 00 BVC *+2	Clobbers V
EA ... NOP × 21 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 21 04 04 NOP $04	Requires support for unofficial opcodes
24 bytes
EA ... NOP × 21 4C xx xx JMP *+3	Not relocatable code

46 cycles

5 bytes
A2 08 LDX #8 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 09 LDY #9 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 13 LDA #19 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
68 PLA 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C
8 bytes
08 PHP 28 PLP 00 00... BRK 0 × 3	Requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP A2 06 LDX #6 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 07 LDY #7 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
08 PHP A6 A6 LDX $A6 A2 06 LDX #6 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 07 LDY #7 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 07 LDX #7 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 05 LDA #5 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 68 PLA 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 88 ... DEY × 2 30 FB BMI *-3 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 3 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA NOP 20 xx xx JSR @rts14 20 xx xx JSR @rts15× 2	Requires @rts12, @rts14, and @rts15; and writes in stack
85 xx STA @zptemp 68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only B0 FC BCS *-2 A5 xx LDA @zptemp	Clobbers S, Z&N, C, and V; and requires @zptemp
11 bytes
08 PHP 48 PHA A9 2A LDA #$2A ;hides 'ROL A' EA ... NOP × 3 10 FA BPL *-4 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 07 LDY #7 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
16 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N
23 bytes
EA ... NOP × 23	No requirements

47 cycles

5 bytes
A9 14 LDA #20 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 ... PLA × 2 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
7 bytes
BA TSX 68 PLA 9A TXS A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, X, Z&N, and C; and unsafe for interrupts
A2 08 LDX #8 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 08 LDX #8 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 08 LDY #8 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
EA NOP F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
F6 F6 INC $F6,X A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 0D LDA #13 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 0D LDA #13 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
00 00 BRK 0 A0 88 LDY #136 ;hides 'DEY' 88 DEY 30 FC BMI *-2	Clobbers Y, and Z&N; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 A2 07 LDX #7 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
AA TAX 68 PLA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 8C TXA	Clobbers X, S, Z&N, and C
EA NOP 68 PLA A2 07 LDX #7 CA DEX 10 FD BPL *-1	Clobbers A, X, S, and Z&N
48 ... PHA × 2 A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
A8 TAY 68 PLA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 98 TYA	Clobbers Y, S, Z&N, and C
EA NOP 68 PLA A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
8 bytes
98 TYA A0 05 LDY #5 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 07 LDX #7 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
08 PHP A2 05 LDX #5 ;hides 'ORA zp' EA NOP CA DEX D0 FB BNE *-3 28 PLP	Clobbers A, and X; and writes in stack
EA ... NOP × 3 A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
08 PHP A0 05 LDY #5 ;hides 'ORA zp' EA NOP 88 DEY D0 FB BNE *-3 28 PLP	Clobbers A, and Y; and writes in stack
9 bytes
48 PHA 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 06 LDX #6 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 07 LDY #7 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 08 LDY #8 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 06 LDA #6 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
08 PHP 28 PLP 00 00... BRK 0 × 2 20 xx xx JSR @rts14	Requires dummy interrupt handler, @rts12, and @rts14; and writes in stack
EA NOP 48 ... PHA × 2 00 00... BRK 0 × 3	Clobbers S; requires dummy interrupt handler; and writes in stack
10 bytes
08 PHP 48 PHA 18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1 68 PLA 28 PLP	Writes in stack
17 bytes
EA ... NOP × 2 FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 2 FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 2 FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 2 FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 2 FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 2 FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
18 bytes
C5 C5 CMP $C5 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
19 bytes
EA NOP 26 26... ROL $26 × 9	Clobbers Z&N
24 bytes
18 ... CLC × 22 90 00 BCC *+2	Clobbers C
B8 ... CLV × 22 50 00 BVC *+2	Clobbers V
EA ... NOP × 22 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 22 04 04 NOP $04	Requires support for unofficial opcodes
25 bytes
EA ... NOP × 22 4C xx xx JMP *+3	Not relocatable code

48 cycles

5 bytes
A9 15 LDA #21 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 08 LDX #8 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA NOP A0 09 LDY #9 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
48 PHA 38 SEC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 38 SEC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
EA NOP 68 PLA 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C
08 PHP A2 07 LDX #7 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 08 LDY #8 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
8 bytes
98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 88 DEY 30 FB BMI *-3 A8 TAY	Clobbers A, and Z&N
9 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
10 bytes
C5 C5 CMP $C5 85 xx STA @zptemp A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 A5 xx LDA @zptemp	Clobbers Z&N, and C; and requires @zptemp
11 bytes
84 xx STY @zptemp A0 07 LDY #7 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 07 LDY #7 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
12 bytes
EA ... NOP × 3 84 xx STY @zptemp A0 07 LDY #7 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
16 bytes
36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N
24 bytes
EA ... NOP × 24	No requirements

49 cycles

4 bytes
A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers Y, and Z&N
5 bytes
A9 16 LDA #22 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 48 PHA 90 FC BCC *-2	Clobbers A, S, Z&N, and C; and writes in stack
A2 06 LDX #6 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
7 bytes
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 90 FB BCC *-3	Clobbers A, Z&N, and C; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 24 24 BIT $24 90 FB BCC *-3	Clobbers A, Z&N, C, and V
A6 A6 LDX $A6 A2 08 LDX #8 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 90 FB BCC *-3	Clobbers A, Z&N, and C; and requires @zptemp
48 PHA A9 0F LDA #15 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 0F LDA #15 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 90 FB BCC *-3	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
48 ... PHA × 2 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 PHA 08 PHP A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A, and S; and writes in stack
EA NOP 68 ... PLA × 2 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
8 bytes
C5 C5 CMP $C5 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
26 26 ROL $26 66 26 ROR $26 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C
68 PLA 98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 07 LDX #7 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 07 LDX #7 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 07 LDY #7 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
08 PHP F6 F6 INC $F6,X A0 07 LDY #7 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 08 LDA #8 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 08 PHP A2 06 LDX #6 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 07 LDY #7 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
85 xx STA @zptemp 68 PLA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp
48 PHA 08 PHP 28 PLP 00 00... BRK 0 × 3	Clobbers S; requires dummy interrupt handler; and writes in stack
10 bytes
08 PHP 48 PHA A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A0 05 LDY #5 EA NOP 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
18 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N, and V
EA ... NOP × 3 FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 3 FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 3 FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 3 FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 3 FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 3 FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
19 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
20 bytes
EA ... NOP × 2 26 26... ROL $26 × 9	Clobbers Z&N
25 bytes
18 ... CLC × 23 90 00 BCC *+2	Clobbers C
B8 ... CLV × 23 50 00 BVC *+2	Clobbers V
EA ... NOP × 23 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 23 04 04 NOP $04	Requires support for unofficial opcodes
26 bytes
EA ... NOP × 23 4C xx xx JMP *+3	Not relocatable code

50 cycles

5 bytes
A9 17 LDA #23 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA NOP B0 FB BCS *-3	Clobbers A, Z&N, C, and V
A2 06 LDX #6 EA NOP CA DEX 10 FC BPL *-2	Clobbers X, and Z&N
A0 07 LDY #7 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
98 TYA A0 09 LDY #9 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
48 PHA A9 10 LDA #16 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 10 LDA #16 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 38 ... SEC × 2 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 38 ... SEC × 2 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
08 PHP A2 06 LDX #6 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 05 LDY #5 EA NOP 88 DEY 10 FC BPL *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Writes in stack
10 bytes
84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' EA NOP 88 DEY 30 FB BMI *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
17 bytes
EA NOP 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N
25 bytes
EA ... NOP × 25	No requirements

51 cycles

5 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2	Clobbers A, Z&N, C, and V
A2 09 LDX #9 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 09 LDY #9 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
7 bytes
20 xx xx JSR @rts12 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C; requires @rts12; and writes in stack
48 PHA A9 11 LDA #17 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 11 LDA #17 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 ... PLA × 3 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
8 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
36 36 ROL $36,X 76 36 ROR $36,X A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C
08 PHP A0 88 LDY #136 ;hides 'DEY' EA NOP 88 DEY 30 FB BMI *-3 28 PLP	Clobbers Y; and writes in stack
48 PHA 08 PHP A2 07 LDX #7 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
9 bytes
08 PHP A6 A6 LDX $A6 A2 07 LDX #7 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
8C TXA A2 08 LDX #8 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 0A LDA #10 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
20 xx xx JSR @rts12 00 00... BRK 0 × 3	Requires dummy interrupt handler, and @rts12; and writes in stack
EA NOP 68 PLA 98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
EA ... NOP × 3 98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
F6 F6 INC $F6,X 85 xx STA @zptemp A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 A5 xx LDA @zptemp	Clobbers Z&N, and C; and requires @zptemp, and writable $00-$FF
00 00 BRK 0 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
85 xx STA @zptemp EA NOP 68 PLA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp
11 bytes
08 PHP 48 PHA A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 38 SEC 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 08 LDY #8 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
18 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
19 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
FE 00 02 INC $0200,X 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
21 bytes
EA ... NOP × 3 26 26... ROL $26 × 9	Clobbers Z&N
26 bytes
18 ... CLC × 24 90 00 BCC *+2	Clobbers C
B8 ... CLV × 24 50 00 BVC *+2	Clobbers V
EA ... NOP × 24 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 24 04 04 NOP $04	Requires support for unofficial opcodes
27 bytes
EA ... NOP × 24 4C xx xx JMP *+3	Not relocatable code

52 cycles

5 bytes
A9 19 LDA #25 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
48 PHA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers Y, S, and Z&N; and writes in stack
6 bytes
A4 A4 LDY $A4 A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers Y, and Z&N
00 00 BRK 0 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
7 bytes
38 SEC A9 69 LDA #$69 ;hides 'ADC #$EA' EA NOP ;first loop only EA NOP 10 FB BPL *-3	Clobbers A, Z&N, C, and V
EA NOP A2 06 LDX #6 EA NOP CA DEX 10 FC BPL *-2	Clobbers X, and Z&N
48 PHA A9 12 LDA #18 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 12 LDA #18 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 48 PHA 90 FC BCC *-2	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
EA NOP 98 TYA A0 09 LDY #9 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
F6 F6 INC $F6,X 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
00 00... BRK 0 × 4	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 3 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 ... PHA × 2 08 PHP A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A, and S; and writes in stack
9 bytes
48 PHA 98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 07 LDX #7 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 08 LDY #8 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 09 LDY #9 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 0B LDA #11 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$EA' EA NOP ;first loop only 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
18 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N
26 bytes
EA ... NOP × 26	No requirements

53 cycles

5 bytes
A9 1A LDA #26 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
68 PLA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers A, Y, S, and Z&N
6 bytes
98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY	Clobbers A, and Z&N
EA NOP A2 09 LDX #9 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA NOP A0 09 LDY #9 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
7 bytes
08 PHP A2 08 LDX #8 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 09 LDY #9 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 13 LDA #19 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 13 LDA #19 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
10 bytes
85 xx STA @zptemp 68 ... PLA × 2 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp
11 bytes
84 xx STY @zptemp A0 08 LDY #8 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 08 LDY #8 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
12 bytes
EA ... NOP × 3 84 xx STY @zptemp A0 08 LDY #8 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
19 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
20 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
22 bytes
EA ... NOP × 4 26 26... ROL $26 × 9	Clobbers Z&N
27 bytes
18 ... CLC × 25 90 00 BCC *+2	Clobbers C
B8 ... CLV × 25 50 00 BVC *+2	Clobbers V
EA ... NOP × 25 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 25 04 04 NOP $04	Requires support for unofficial opcodes
28 bytes
EA ... NOP × 25 4C xx xx JMP *+3	Not relocatable code

54 cycles

5 bytes
A9 1B LDA #27 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
E6 xx INC @zptemp A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers Y, and Z&N; and requires @zptemp
A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 2 10 FB BPL *-3	Clobbers A, S, Z&N, and C; and writes in stack
48 PHA A2 09 LDX #9 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 09 LDY #9 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
A0 88 LDY #136 ;hides 'DEY' 68 PLA 88 DEY 30 FB BMI *-3	Clobbers A, Y, S, and Z&N
7 bytes
A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 10 FA BPL *-4	Clobbers A, Z&N, and C
A6 A6 LDX $A6 A2 09 LDX #9 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 09 LDY #9 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 14 LDA #20 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 14 LDA #20 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
98 TYA A0 07 LDY #7 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
08 PHP BA TSX 68 PLA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 9A TXS 28 PLP	Clobbers A, and X; writes in stack; and unsafe for interrupts
08 PHP A2 08 LDX #8 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 08 LDX #8 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 08 LDY #8 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
EA NOP F6 F6 INC $F6,X 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP EA NOP F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X A0 08 LDY #8 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 0D LDA #13 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 00 00... BRK 0 × 4	Requires dummy interrupt handler; and writes in stack
EA NOP 48 ... PHA × 3 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers S, Z&N, and C; and writes in stack
EA NOP 48 ... PHA × 2 08 PHP A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A, and S; and writes in stack
48 ... PHA × 2 08 PHP A2 07 LDX #7 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 08 LDY #8 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
48 PHA 98 TYA A0 05 LDY #5 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 05 LDY #5 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 08 PHP A2 07 LDX #7 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 3 08 PHP A0 08 LDY #8 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
EA NOP 84 xx STY @zptemp A0 09 LDY #9 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 07 LDY #7 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
18 bytes
36 36... ROL $36,X× 9	Clobbers Z&N
27 bytes
EA ... NOP × 27	No requirements

55 cycles

5 bytes
A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
A2 F8 LDX #248 ;hides 'SED' E8 INX D0 FC BNE *-2	Clobbers X, Z&N, and D
A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2	Clobbers Y, Z&N, and D
6 bytes
F6 F6 INC $F6,X A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
A2 06 LDX #6 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
48 ... PHA × 2 A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers Y, S, and Z&N; and writes in stack
A0 05 LDY #5 68 PLA 88 DEY 10 FC BPL *-2	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 09 LDY #9 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 09 LDX #9 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 09 LDY #9 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 15 LDA #21 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 15 LDA #21 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 08 LDX #8 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 09 LDY #9 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
9 bytes
08 PHP 48 PHA 38 SEC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
19 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
20 bytes
EA ... NOP × 2 C5 C5 CMP $C5 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N, and C
EA ... NOP × 2 24 24 BIT $24 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N, and V
EA ... NOP × 2 04 04 NOP $04 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
21 bytes
EA ... NOP × 2 4C xx xx JMP *+3 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
22 bytes
26 26 ROL $26 66 26 ROR $26 26 26... ROL $26 × 9	Clobbers Z&N
28 bytes
18 ... CLC × 26 90 00 BCC *+2	Clobbers C
B8 ... CLV × 26 50 00 BVC *+2	Clobbers V
EA ... NOP × 26 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 26 04 04 NOP $04	Requires support for unofficial opcodes
29 bytes
EA ... NOP × 26 4C xx xx JMP *+3	Not relocatable code

56 cycles

5 bytes
A2 0B LDX #11 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 1D LDA #29 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
08 PHP A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 28 PLP	Clobbers Y; and writes in stack
7 bytes
E6 xx INC @zptemp A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2	Clobbers A, Z&N, C, and V; and requires @zptemp
A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts14 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
48 PHA A9 16 LDA #22 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 16 LDA #22 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
8 bytes
A5 A5 LDA $A5 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY	Clobbers A, and Z&N
48 PHA 08 PHP A2 08 LDX #8 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
9 bytes
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 90 FB BCC *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 24 24 BIT $24 90 FB BCC *-3 28 PLP	Clobbers A; and writes in stack
08 PHP A2 06 LDX #6 24 24 BIT $24 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP 48 PHA A9 0F LDA #15 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Clobbers S; and writes in stack
10 bytes
08 PHP 48 PHA A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A0 07 LDY #7 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
19 bytes
EA NOP 36 36... ROL $36,X× 9	Clobbers Z&N
28 bytes
EA ... NOP × 28	No requirements

57 cycles

5 bytes
A9 1E LDA #30 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
A2 07 LDX #7 EA NOP CA DEX 10 FC BPL *-2	Clobbers X, and Z&N
A0 08 LDY #8 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 17 LDA #23 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 17 LDA #23 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 PLA 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY	Clobbers A, S, and Z&N
8 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA NOP B0 FB BCS *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA NOP B0 FB BCS *-3 28 PLP	Clobbers A; and writes in stack
EA NOP 98 TYA A0 09 LDY #9 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 06 LDX #6 EA NOP CA DEX 10 FC BPL *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 07 LDY #7 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 98 TYA A0 09 LDY #9 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
84 xx STY @zptemp A0 09 LDY #9 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 10 LDA #16 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 ... SEC × 2 A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
20 bytes
C5 C5 CMP $C5 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
21 bytes
4C xx xx JMP *+3 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
22 bytes
36 36 ROL $36,X 76 36 ROR $36,X 26 26... ROL $26 × 9	Clobbers Z&N
29 bytes
18 ... CLC × 27 90 00 BCC *+2	Clobbers C
B8 ... CLV × 27 50 00 BVC *+2	Clobbers V
EA ... NOP × 27 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 27 04 04 NOP $04	Requires support for unofficial opcodes
30 bytes
EA ... NOP × 27 4C xx xx JMP *+3	Not relocatable code

58 cycles

5 bytes
A9 1F LDA #31 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 0B LDX #11 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
7 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 28 PLP	Clobbers A; and writes in stack
A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
08 PHP A2 09 LDX #9 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 09 LDY #9 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
8 bytes
E6 xx INC @zptemp 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY	Clobbers A, and Z&N; and requires @zptemp
9 bytes
A5 A5 LDA $A5 98 TYA A0 09 LDY #9 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
20 xx xx JSR @rts12 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; requires @rts12; and writes in stack
08 PHP 48 PHA A9 11 LDA #17 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A4 xx LDY @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
10 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A4 A4 LDY $A4 A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
20 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N
29 bytes
EA ... NOP × 29	No requirements

59 cycles

5 bytes
A9 20 LDA #32 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3	Clobbers A, Z&N, and C; and writes in stack
68 PLA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
48 PHA A2 0B LDX #11 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
68 PLA A2 F8 LDX #248 ;hides 'SED' E8 INX D0 FC BNE *-2	Clobbers A, X, S, Z&N, and D
48 PHA A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
68 PLA A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2	Clobbers A, Y, S, Z&N, and D
7 bytes
38 ... SEC × 2 A9 0A LDA #$0A ;hides 'ASL A' 38 SEC D0 FC BNE *-2	Clobbers A, Z&N, and C
98 TYA A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2 A8 TAY	Clobbers A, Z&N, and D
A6 A6 LDX $A6 A2 0B LDX #11 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 19 LDA #25 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 19 LDA #25 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 08 PHP A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 28 PLP	Clobbers Y, and S; and writes in stack
8 bytes
08 PHP A4 A4 LDY $A4 A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 28 PLP	Clobbers Y; and writes in stack
F6 F6 INC $F6,X 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
00 00 BRK 0 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
00 00 BRK 0 08 PHP A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
68 PLA 98 TYA A0 09 LDY #9 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$EA' EA NOP ;first loop only EA NOP 10 FB BPL *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$EA' EA NOP ;first loop only EA NOP 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 98 TYA A0 09 LDY #9 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA NOP 08 PHP A2 06 LDX #6 EA NOP CA DEX 10 FC BPL *-2 28 PLP	Clobbers X; and writes in stack
08 PHP 48 PHA A9 12 LDA #18 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 09 LDY #9 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 84 xx STY @zptemp A0 09 LDY #9 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 28 PLP 00 00... BRK 0 × 4	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Clobbers S; and writes in stack
11 bytes
08 PHP 48 PHA 98 TYA A0 08 LDY #8 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
21 bytes
EA NOP C5 C5 CMP $C5 36 36... ROL $36,X× 9	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA ... NOP × 2 FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA ... NOP × 2 FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA ... NOP × 2 FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA ... NOP × 2 FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA ... NOP × 2 FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA ... NOP × 2 FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
22 bytes
EA NOP 4C xx xx JMP *+3 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
23 bytes
EA NOP 36 36 ROL $36,X 76 36 ROR $36,X 26 26... ROL $26 × 9	Clobbers Z&N
30 bytes
18 ... CLC × 28 90 00 BCC *+2	Clobbers C
B8 ... CLV × 28 50 00 BVC *+2	Clobbers V
EA ... NOP × 28 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 28 04 04 NOP $04	Requires support for unofficial opcodes
31 bytes
EA ... NOP × 28 4C xx xx JMP *+3	Not relocatable code

60 cycles

5 bytes
A9 21 LDA #33 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 0B LDX #11 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 0B LDX #11 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 1A LDA #26 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 1A LDA #26 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 09 LDX #9 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 09 LDY #9 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
08 PHP 48 PHA A9 13 LDA #19 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 08 PHP A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 28 PLP 68 PLA 28 PLP	Writes in stack
E6 xx INC @zptemp 84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
20 bytes
36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N
30 bytes
EA ... NOP × 30	No requirements

61 cycles

5 bytes
A2 0C LDX #12 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 0C LDY #12 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 22 LDA #34 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3	Clobbers A, Z&N, and C; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' E6 xx INC @zptemp 90 FB BCC *-3	Clobbers A, Z&N, and C; and requires @zptemp
48 PHA A9 1B LDA #27 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 1B LDA #27 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
EA NOP 68 PLA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
8 bytes
98 TYA A0 08 LDY #8 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
08 PHP E6 xx INC @zptemp A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 28 PLP	Clobbers Y; requires @zptemp; and writes in stack
48 ... PHA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 28 PLP	Clobbers A, and S; and writes in stack
48 PHA 08 PHP A2 09 LDX #9 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 09 LDY #9 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 10 FA BPL *-4 28 PLP	Clobbers A; and writes in stack
08 PHP A6 A6 LDX $A6 A2 09 LDX #9 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 09 LDY #9 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
85 xx STA @zptemp A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 A5 xx LDA @zptemp	Clobbers Z&N, and C; and requires @zptemp
84 xx STY @zptemp A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N, and D; and requires @zptemp
08 PHP 48 PHA A9 14 LDA #20 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 07 LDY #7 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
F6 F6 INC $F6,X 84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
11 bytes
EA ... NOP × 2 84 xx STY @zptemp A0 09 LDY #9 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA EA NOP F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
EA NOP 08 PHP 28 PLP 00 00... BRK 0 × 4	Requires dummy interrupt handler; and writes in stack
EA NOP 48 ... PHA × 2 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
08 PHP 48 PHA 98 TYA A0 05 LDY #5 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
21 bytes
FE 00 02 INC $0200,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
22 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
23 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
24 bytes
EA ... NOP × 2 36 36 ROL $36,X 76 36 ROR $36,X 26 26... ROL $26 × 9	Clobbers Z&N
31 bytes
18 ... CLC × 29 90 00 BCC *+2	Clobbers C
B8 ... CLV × 29 50 00 BVC *+2	Clobbers V
EA ... NOP × 29 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 29 04 04 NOP $04	Requires support for unofficial opcodes
32 bytes
EA ... NOP × 29 4C xx xx JMP *+3	Not relocatable code

62 cycles

5 bytes
A2 88 LDX #136 ;hides 'DEY' CA DEX 30 FC BMI *-2	Clobbers X, Y, and Z&N
A9 23 LDA #35 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
00 00 BRK 0 A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers Y, and Z&N; requires dummy interrupt handler; and writes in stack
7 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
68 PLA 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
08 PHP A2 F8 LDX #248 ;hides 'SED' E8 INX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
C9 CD CMP #<$CD ;hides 'CMP $86A2' A2 86 LDX #134 CA DEX 30 FA BMI *-4	Clobbers X, Z&N, and C
A2 2C LDX #<$2C ;hides 'BIT $79A2' A2 79 LDX #121 E8 INX 10 FA BPL *-4	Clobbers X, Z&N, and V
A9 AD LDA #<$AD ;hides 'LDA $07A2' A2 07 LDX #7 CA DEX D0 FA BNE *-4	Clobbers A, X, and Z&N
08 PHP A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
C9 CD CMP #<$CD ;hides 'CMP $79A0' A0 79 LDY #121 C8 INY 10 FA BPL *-4	Clobbers Y, Z&N, and C
A0 2C LDY #<$2C ;hides 'BIT $86A0' A0 86 LDY #134 88 DEY 30 FA BMI *-4	Clobbers Y, Z&N, and V
A9 AD LDA #<$AD ;hides 'LDA $86A0' A0 86 LDY #134 88 DEY 30 FA BMI *-4	Clobbers A, Y, and Z&N
A2 0B LDX #11 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 0B LDX #11 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 0B LDY #11 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
A2 8D LDX #<$8D ;hides 'STA $06A2' A2 06 LDX #6 CA DEX 10 FA BPL *-4	Clobbers X, and Z&N; and requires writable $600-$6FF
A2 8D LDX #<$8D ;hides 'STA $07A2' A2 07 LDX #7 CA DEX D0 FA BNE *-4	Clobbers X, and Z&N; and requires writable $700-$7FF
A0 8D LDY #<$8D ;hides 'STA $06A0' A0 06 LDY #6 88 DEY 10 FA BPL *-4	Clobbers Y, and Z&N; and requires writable $600-$6FF
A0 8D LDY #<$8D ;hides 'STA $07A0' A0 07 LDY #7 88 DEY D0 FA BNE *-4	Clobbers Y, and Z&N; and requires writable $700-$7FF
F6 F6 INC $F6,X A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
80 0C NOP #<$0C ;hides 'NOP $06A2' A2 06 LDX #6 CA DEX 10 FA BPL *-4	Clobbers X, and Z&N; and requires support for unofficial opcodes
80 0C NOP #<$0C ;hides 'NOP $F9A0' A0 F9 LDY #249 C8 INY D0 FA BNE *-4	Clobbers Y, and Z&N; and requires support for unofficial opcodes
8 bytes
EA NOP 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 0B LDX #11 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 09 LDY #9 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
84 xx STY @zptemp A0 0B LDY #11 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 15 LDA #21 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A4 xx LDY @zptemp 28 PLP	Requires @zptemp; and writes in stack
11 bytes
08 PHP 48 PHA 08 PHP 38 SEC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP 68 PLA 28 PLP	Writes in stack
21 bytes
EA NOP 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N
31 bytes
EA ... NOP × 31	No requirements

63 cycles

5 bytes
A9 24 LDA #36 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
A9 4A LDA #$4A ;hides 'LSR A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
6 bytes
EA NOP A2 0C LDX #12 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 0C LDY #12 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
7 bytes
38 SEC A9 0B LDA #11 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
A9 4A LDA #$4A ;hides 'LSR A' 4C xx xx JMP *+3 D0 FA BNE *-4	Clobbers A, Z&N, and C; and not relocatable code
08 PHP A2 0B LDX #11 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0B LDY #11 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 1D LDA #29 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 1D LDA #29 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 ... PLA × 2 A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
8 bytes
18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3	Clobbers A, Z&N, and C; and writes in stack
48 PHA 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
68 PLA 98 TYA A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2 A8 TAY	Clobbers A, S, Z&N, and D
9 bytes
A5 A5 LDA $A5 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
E6 xx INC @zptemp 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA	Clobbers Z&N, C, and V; requires @zptemp; and writes in stack
08 PHP E6 xx INC @zptemp A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 28 PLP	Clobbers A; requires @zptemp; and writes in stack
48 PHA A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts14 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts14 10 FA BPL *-4 28 PLP	Clobbers A; requires @rts12, and @rts14; and writes in stack
08 PHP 48 PHA A9 16 LDA #22 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
48 PHA 08 PHP 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 28 PLP	Clobbers A, and S; and writes in stack
10 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A4 A4 LDY $A4 A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
84 xx STY @zptemp A0 08 LDY #8 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 24 24 BIT $24 90 FB BCC *-3 68 PLA 28 PLP	Writes in stack
22 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
23 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
25 bytes
EA ... NOP × 3 36 36 ROL $36,X 76 36 ROR $36,X 26 26... ROL $26 × 9	Clobbers Z&N
32 bytes
18 ... CLC × 30 90 00 BCC *+2	Clobbers C
B8 ... CLV × 30 50 00 BVC *+2	Clobbers V
EA ... NOP × 30 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 30 04 04 NOP $04	Requires support for unofficial opcodes
33 bytes
EA ... NOP × 30 4C xx xx JMP *+3	Not relocatable code

64 cycles

5 bytes
A9 25 LDA #37 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 08 LDX #8 EA NOP CA DEX 10 FC BPL *-2	Clobbers X, and Z&N
A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA ... NOP × 2 B0 FA BCS *-4	Clobbers A, Z&N, C, and V
48 PHA A9 1E LDA #30 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 1E LDA #30 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 2 38 SEC 10 FA BPL *-4	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 18 CLC D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 10 F9 BPL *-5	Clobbers A, Z&N, and C
08 PHP A2 07 LDX #7 EA NOP CA DEX 10 FC BPL *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 08 LDY #8 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
68 PLA 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 17 LDA #23 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA NOP B0 FB BCS *-3 68 PLA 28 PLP	Writes in stack
EA NOP 84 xx STY @zptemp A0 0B LDY #11 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
22 bytes
26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N
32 bytes
EA ... NOP × 32	No requirements

65 cycles

5 bytes
A9 26 LDA #38 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
38 SEC A9 0A LDA #$0A ;hides 'ASL A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
A2 07 LDX #7 48 PHA CA DEX 10 FC BPL *-2	Clobbers X, S, and Z&N; and writes in stack
68 PLA A2 0C LDX #12 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
A0 08 LDY #8 48 PHA 88 DEY D0 FC BNE *-2	Clobbers Y, S, and Z&N; and writes in stack
68 PLA A0 0C LDY #12 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 0C LDX #12 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 0C LDY #12 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 1F LDA #31 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 1F LDA #31 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 0B LDX #11 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 0B LDY #11 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 2 A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 PHA 08 PHP A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 28 PLP	Clobbers A, and S; and writes in stack
9 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA 28 PLP	Writes in stack
10 bytes
85 xx STA @zptemp 68 PLA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp
11 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 0B LDX #11 CA DEX D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
23 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
24 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
26 bytes
26 26 ROL $26 \ × 2 66 26 ROR $26 / 26 26... ROL $26 × 9	Clobbers Z&N
33 bytes
18 ... CLC × 31 90 00 BCC *+2	Clobbers C
B8 ... CLV × 31 50 00 BVC *+2	Clobbers V
EA ... NOP × 31 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 31 04 04 NOP $04	Requires support for unofficial opcodes
34 bytes
EA ... NOP × 31 4C xx xx JMP *+3	Not relocatable code

66 cycles

5 bytes
A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 0C LDY #12 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 27 LDA #39 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
7 bytes
48 PHA A9 20 LDA #32 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 20 LDA #32 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
38 SEC A9 08 LDA #8 EA NOP E9 01 SBC #1 10 FB BPL *-3	Clobbers A, Z&N, C, and V
A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
04 04 NOP $04 A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
68 ... PLA × 2 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
48 PHA 08 PHP A2 0B LDX #11 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 0B LDY #11 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
48 PHA 98 TYA A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N, and D; and writes in stack
98 TYA C9 CD CMP #<$CD ;hides 'CMP $79A0' A0 79 LDY #121 C8 INY 10 FA BPL *-4 A8 TAY	Clobbers A, Z&N, and C
98 TYA A0 2C LDY #<$2C ;hides 'BIT $86A0' A0 86 LDY #134 88 DEY 30 FA BMI *-4 A8 TAY	Clobbers A, Z&N, and V
68 PLA 48 PHA 98 TYA A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2 A8 TAY	Clobbers A, Z&N, and D
08 PHP A6 A6 LDX $A6 A2 0B LDX #11 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 0B LDY #11 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 0B LDX #11 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
98 TYA A0 8D LDY #<$8D ;hides 'STA $06A0' A0 06 LDY #6 88 DEY 10 FA BPL *-4 A8 TAY	Clobbers A, and Z&N; and requires writable $600-$6FF
98 TYA A0 8D LDY #<$8D ;hides 'STA $07A0' A0 07 LDY #7 88 DEY D0 FA BNE *-4 A8 TAY	Clobbers A, and Z&N; and requires writable $700-$7FF
08 PHP 48 PHA A9 19 LDA #25 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
8C TXA 80 0C NOP #<$0C ;hides 'NOP $06A2' A2 06 LDX #6 CA DEX 10 FA BPL *-4 AA TAX	Clobbers A, and Z&N; and requires support for unofficial opcodes
EA NOP 68 PLA 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
EA ... NOP × 3 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
F6 F6 INC $F6,X 48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 68 PLA	Clobbers Z&N; requires @zptemp, and writable $00-$FF; and writes in stack
00 00 BRK 0 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' D0 FD BNE *-1 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 3 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$EA' EA NOP ;first loop only EA NOP 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 0B LDY #11 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
22 bytes
36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N
33 bytes
EA ... NOP × 33	No requirements

67 cycles

5 bytes
A9 28 LDA #40 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A9 4A LDA #$4A ;hides 'LSR A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
7 bytes
BA TSX A9 4A LDA #$4A ;hides 'LSR A' 48 PHA D0 FC BNE *-2 9A TXS	Clobbers A, X, Z&N, and C; and writes in stack
A2 0C LDX #12 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 0C LDX #12 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 0C LDY #12 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
18 CLC A9 0A LDA #$0A ;hides 'ASL A' F6 F6 INC $F6,X 90 FB BCC *-3	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
A0 05 LDY #5 F6 F6 INC $F6,X 88 DEY 10 FB BPL *-3	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 21 LDA #33 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 21 LDA #33 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A2 06 LDX #6 48 ... PHA × 2 CA DEX D0 FB BNE *-3	Clobbers X, S, and Z&N; and writes in stack
A2 06 LDX #6 EA NOP 68 PLA CA DEX D0 FB BNE *-3	Clobbers A, X, S, and Z&N
A0 05 LDY #5 48 ... PHA × 2 88 DEY 10 FB BPL *-3	Clobbers Y, S, and Z&N; and writes in stack
A0 05 LDY #5 EA NOP 68 PLA 88 DEY 10 FB BPL *-3	Clobbers A, Y, S, and Z&N
68 PLA A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and requires @zptemp
68 PLA A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and requires support for unofficial opcodes
8 bytes
EA NOP 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
A6 A6 LDX $A6 A2 08 LDX #8 EA NOP CA DEX 10 FC BPL *-2	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 0B LDX #11 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 0B LDY #11 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 0C LDY #12 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 1A LDA #26 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
23 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
24 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
25 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
26 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 26 26... ROL $26 × 9	Clobbers Z&N
34 bytes
18 ... CLC × 32 90 00 BCC *+2	Clobbers C
B8 ... CLV × 32 50 00 BVC *+2	Clobbers V
EA ... NOP × 32 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 32 04 04 NOP $04	Requires support for unofficial opcodes
35 bytes
EA ... NOP × 32 4C xx xx JMP *+3	Not relocatable code

68 cycles

5 bytes
A9 29 LDA #41 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 0C LDY #12 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FC BNE *-2	Clobbers A, Z&N, C, and V
08 PHP A2 0C LDX #12 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0C LDY #12 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 22 LDA #34 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 22 LDA #34 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
EA NOP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
98 TYA A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 1B LDA #27 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 08 LDY #8 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
48 PHA 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
11 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 10 FA BPL *-4 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp C9 CD CMP #<$CD ;hides 'CMP $79A0' A0 79 LDY #121 C8 INY 10 FA BPL *-4 A4 xx LDY @zptemp	Clobbers Z&N, and C; and requires @zptemp
84 xx STY @zptemp A0 2C LDY #<$2C ;hides 'BIT $86A0' A0 86 LDY #134 88 DEY 30 FA BMI *-4 A4 xx LDY @zptemp	Clobbers Z&N, and V; and requires @zptemp
84 xx STY @zptemp A0 0B LDY #11 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 0B LDY #11 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
84 xx STY @zptemp A0 8D LDY #<$8D ;hides 'STA $06A0' A0 06 LDY #6 88 DEY 10 FA BPL *-4 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $600-$6FF
84 xx STY @zptemp A0 8D LDY #<$8D ;hides 'STA $07A0' A0 07 LDY #7 88 DEY D0 FA BNE *-4 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $700-$7FF
86 xx STX @zptemp 80 0C NOP #<$0C ;hides 'NOP $06A2' A2 06 LDX #6 CA DEX 10 FA BPL *-4 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
12 bytes
E6 xx INC @zptemp 84 xx STY @zptemp A0 08 LDY #8 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
23 bytes
EA NOP 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N
34 bytes
EA ... NOP × 34	No requirements

69 cycles

5 bytes
A2 0A LDX #10 ;hides 'ASL A' CA DEX D0 FC BNE *-2	Clobbers A, X, Z&N, and C
A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2	Clobbers Y, and Z&N
A9 2A LDA #42 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
7 bytes
A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 38 SEC 10 FA BPL *-4	Clobbers A, Z&N, and C; and writes in stack
A6 A6 LDX $A6 A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
08 PHP A2 88 LDX #136 ;hides 'DEY' CA DEX 30 FC BMI *-2 28 PLP	Clobbers X, and Y; and writes in stack
48 PHA A9 23 LDA #35 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 23 LDA #35 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
00 00 BRK 0 08 PHP A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 28 PLP	Clobbers Y; requires dummy interrupt handler; and writes in stack
68 PLA 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
10 bytes
EA NOP 84 xx STY @zptemp A0 0C LDY #12 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
24 bytes
C5 C5 CMP $C5 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
25 bytes
4C xx xx JMP *+3 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
26 bytes
36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
35 bytes
18 ... CLC × 33 90 00 BCC *+2	Clobbers C
B8 ... CLV × 33 50 00 BVC *+2	Clobbers V
EA ... NOP × 33 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 33 04 04 NOP $04	Requires support for unofficial opcodes
36 bytes
EA ... NOP × 33 4C xx xx JMP *+3	Not relocatable code

70 cycles

5 bytes
A9 2B LDA #43 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 0C LDY #12 88 DEY 10 FD BPL *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 0C LDY #12 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 24 LDA #36 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 24 LDA #36 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 0C LDX #12 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 0C LDY #12 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3 28 PLP	Clobbers A; requires @zptemp; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires support for unofficial opcodes; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
9 bytes
48 PHA 38 SEC A9 0B LDA #11 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 4C xx xx JMP *+3 D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; writes in stack; and not relocatable code
08 PHP 38 SEC A9 0B LDA #11 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 1D LDA #29 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
84 xx STY @zptemp A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
48 ... PHA × 2 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 48 PHA E6 xx INC @zptemp A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA 28 PLP	Requires @zptemp; and writes in stack
08 PHP 48 PHA A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts14 10 FA BPL *-4 68 PLA 28 PLP	Requires @rts12, and @rts14; and writes in stack
48 PHA 08 PHP 48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
08 PHP 48 PHA A5 A5 LDA $A5 98 TYA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
24 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N
35 bytes
EA ... NOP × 35	No requirements

71 cycles

5 bytes
A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 2C LDA #44 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3	Clobbers A, Z&N, and C
7 bytes
48 PHA A9 25 LDA #37 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 25 LDA #37 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP A2 08 LDX #8 EA NOP CA DEX 10 FC BPL *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA ... NOP × 2 B0 FA BCS *-4 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA ... NOP × 2 B0 FA BCS *-4 28 PLP	Clobbers A; and writes in stack
8C TXA A2 0C LDX #12 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 1E LDA #30 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 68 PLA 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
08 PHP 48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
A5 A5 LDA $A5 98 TYA A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
11 bytes
EA ... NOP × 2 84 xx STY @zptemp A0 0C LDY #12 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
25 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
26 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
27 bytes
EA NOP 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
36 bytes
18 ... CLC × 34 90 00 BCC *+2	Clobbers C
B8 ... CLV × 34 50 00 BVC *+2	Clobbers V
EA ... NOP × 34 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 34 04 04 NOP $04	Requires support for unofficial opcodes
37 bytes
EA ... NOP × 34 4C xx xx JMP *+3	Not relocatable code

72 cycles

5 bytes
A9 2D LDA #45 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 0A LDX #10 ;hides 'ASL A' CA DEX D0 FC BNE *-2	Clobbers A, X, S, Z&N, and C; and writes in stack
48 PHA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
C5 CD CMP <$CD ;hides 'CMP $08A2' A2 08 LDX #8 CA DEX D0 FA BNE *-4	Clobbers X, Z&N, and C
24 2C BIT <$2C ;hides 'BIT $07A2' A2 07 LDX #7 CA DEX 10 FA BPL *-4	Clobbers X, Z&N, and V
A5 AD LDA <$AD ;hides 'LDA $87A2' A2 87 LDX #135 CA DEX 30 FA BMI *-4	Clobbers A, X, and Z&N
A4 A4 LDY $A4 A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2	Clobbers Y, and Z&N
A2 0D LDX #13 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 0D LDX #13 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
48 PHA A9 26 LDA #38 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 26 LDA #38 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
04 0C NOP <$0C ;hides 'NOP $F8A2' A2 F8 LDX #248 E8 INX D0 FA BNE *-4	Clobbers X, and Z&N; and requires support for unofficial opcodes
48 ... PHA × 2 A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
8 bytes
EA NOP 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
48 PHA 08 PHP A2 88 LDX #136 ;hides 'DEY' CA DEX 30 FC BMI *-2 28 PLP	Clobbers X, Y, and S; and writes in stack
9 bytes
48 PHA 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
08 PHP A2 07 LDX #7 24 24 BIT $24 CA DEX 10 FB BPL *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 08 LDY #8 24 24 BIT $24 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 0C LDY #12 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 1F LDA #31 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
11 bytes
08 PHP 48 PHA A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
24 bytes
36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N
36 bytes
EA ... NOP × 36	No requirements

73 cycles

5 bytes
A9 2E LDA #46 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
7 bytes
98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY	Clobbers A, and Z&N
08 PHP A2 0D LDX #13 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0C LDY #12 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 27 LDA #39 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 27 LDA #39 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
9 bytes
08 PHP 48 PHA A9 20 LDA #32 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; requires @zptemp; and writes in stack
48 PHA 08 PHP A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3 28 PLP	Clobbers A, and S; requires @zptemp; and writes in stack
48 ... PHA × 2 A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3 28 PLP	Clobbers A, and S; requires support for unofficial opcodes; and writes in stack
10 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
11 bytes
84 xx STY @zptemp A0 0C LDY #12 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 0C LDY #12 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
85 xx STA @zptemp 68 PLA A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; and requires @zptemp, and support for unofficial opcodes
12 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 08 LDX #8 EA NOP CA DEX 10 FC BPL *-2 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
25 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
26 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
27 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
28 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
37 bytes
18 ... CLC × 35 90 00 BCC *+2	Clobbers C
B8 ... CLV × 35 50 00 BVC *+2	Clobbers V
EA ... NOP × 35 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 35 04 04 NOP $04	Requires support for unofficial opcodes
38 bytes
EA ... NOP × 35 4C xx xx JMP *+3	Not relocatable code

74 cycles

5 bytes
A9 2F LDA #47 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 28 LDA #40 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 28 LDA #40 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3	Clobbers A, Z&N, and C
68 PLA 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP BA TSX A9 4A LDA #$4A ;hides 'LSR A' 48 PHA D0 FC BNE *-2 9A TXS 28 PLP	Clobbers A, and X; and writes in stack
08 PHP A2 0C LDX #12 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 0C LDX #12 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 0C LDY #12 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' F6 F6 INC $F6,X 90 FB BCC *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' F6 F6 INC $F6,X 90 FB BCC *-3 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP A0 05 LDY #5 F6 F6 INC $F6,X 88 DEY 10 FB BPL *-3 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 21 LDA #33 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 08 PHP A2 08 LDX #8 EA NOP CA DEX 10 FC BPL *-2 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 07 LDX #7 24 24 BIT $24 CA DEX 10 FB BPL *-3 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 08 LDY #8 24 24 BIT $24 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
EA NOP 84 xx STY @zptemp A0 0C LDY #12 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 0B LDY #11 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
25 bytes
EA NOP 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N
37 bytes
EA ... NOP × 37	No requirements

75 cycles

5 bytes
A9 30 LDA #48 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 29 LDA #41 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 29 LDA #41 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 0D LDX #13 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 0C LDY #12 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 22 LDA #34 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
10 bytes
48 PHA 98 TYA A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
11 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
26 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
27 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
29 bytes
EA ... NOP × 3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
38 bytes
18 ... CLC × 36 90 00 BCC *+2	Clobbers C
B8 ... CLV × 36 50 00 BVC *+2	Clobbers V
EA ... NOP × 36 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 36 04 04 NOP $04	Requires support for unofficial opcodes
39 bytes
EA ... NOP × 36 4C xx xx JMP *+3	Not relocatable code

76 cycles

5 bytes
A2 0F LDX #15 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 0F LDY #15 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 31 LDA #49 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
A9 E9 LDA #$E9 ;hides 'SBC #$08' 08 PHP ;first loop only 30 FC BMI *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
7 bytes
08 PHP A2 0A LDX #10 ;hides 'ASL A' CA DEX D0 FC BNE *-2 28 PLP	Clobbers A, and X; and writes in stack
08 PHP A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 2A LDA #42 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 2A LDA #42 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 A9 4A LDA #$4A ;hides 'LSR A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; requires dummy interrupt handler; and writes in stack
8 bytes
E6 xx INC @zptemp A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
04 04 NOP $04 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
00 00 BRK 0 A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
48 PHA 08 PHP A2 0D LDX #13 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
9 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 38 SEC 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 38 SEC 10 FA BPL *-4 28 PLP	Clobbers A; and writes in stack
A5 A5 LDA $A5 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY	Clobbers A, and Z&N
08 PHP A6 A6 LDX $A6 A2 0D LDX #13 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP 48 PHA A9 23 LDA #35 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA 08 PHP A9 4A LDA #$4A ;hides 'LSR A' 18 CLC D0 FC BNE *-2 28 PLP 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 0C LDY #12 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
26 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N
38 bytes
EA ... NOP × 38	No requirements

77 cycles

5 bytes
A9 32 LDA #50 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
A2 0E LDX #14 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 0E LDX #14 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 0E LDY #14 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 2B LDA #43 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 2B LDA #43 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
EA NOP 68 PLA A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
48 ... PHA × 2 A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
EA NOP 68 PLA A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
68 PLA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; and requires support for unofficial opcodes
8 bytes
EA NOP 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 0E LDY #14 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 0D LDX #13 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 0C LDY #12 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 0E LDY #14 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 24 LDA #36 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA 28 PLP	Requires @zptemp; and writes in stack
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 0B LDA #11 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
27 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
28 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
30 bytes
26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X 76 36 ROR $36,X 26 26... ROL $26 × 9	Clobbers Z&N
39 bytes
18 ... CLC × 37 90 00 BCC *+2	Clobbers C
B8 ... CLV × 37 50 00 BVC *+2	Clobbers V
EA ... NOP × 37 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 37 04 04 NOP $04	Requires support for unofficial opcodes
40 bytes
EA ... NOP × 37 4C xx xx JMP *+3	Not relocatable code

78 cycles

5 bytes
A9 33 LDA #51 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 0B LDX #11 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$08' 08 PHP ;first loop only 30 FC BMI *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
7 bytes
38 SEC A9 0E LDA #14 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
08 PHP A2 0E LDX #14 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0E LDY #14 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 2C LDA #44 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 2C LDA #44 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
68 PLA 48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3	Clobbers A, Z&N, and C
9 bytes
A5 A5 LDA $A5 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 25 LDA #37 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A4 xx LDY @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
11 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA ... NOP × 2 B0 FA BCS *-4 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A4 A4 LDY $A4 A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
26 bytes
36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
39 bytes
EA ... NOP × 39	No requirements

79 cycles

5 bytes
A9 34 LDA #52 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
A0 88 LDY #136 ;hides 'DEY' 48 PHA 30 FC BMI *-2	Clobbers Y, S, and Z&N; and writes in stack
6 bytes
A0 88 LDY #136 ;hides 'DEY' 85 xx STA @zptemp 30 FB BMI *-3	Clobbers Y, and Z&N; and requires @zptemp
A0 88 LDY #136 ;hides 'DEY' 04 04 NOP $04 30 FB BMI *-3	Clobbers Y, and Z&N; and requires support for unofficial opcodes
A9 4A LDA #$4A ;hides 'LSR A' 48 PHA 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
48 PHA A2 0F LDX #15 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
7 bytes
A9 4A LDA #$4A ;hides 'LSR A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4	Clobbers A, Z&N, C, and V
A6 A6 LDX $A6 A2 0F LDX #15 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 0F LDY #15 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
48 PHA A9 2D LDA #45 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 2D LDA #45 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
8 bytes
A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 08 PHP 28 PLP 10 F9 BPL *-5	Clobbers A, Z&N, and C; and writes in stack
A9 4A LDA #$4A ;hides 'LSR A' 4C xx xx JMP *+3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and not relocatable code
68 PLA 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
48 PHA 08 PHP A2 0A LDX #10 ;hides 'ASL A' CA DEX D0 FC BNE *-2 28 PLP	Clobbers A, X, and S; and writes in stack
48 PHA 08 PHP A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
EA ... NOP × 2 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 24 2C BIT <$2C ;hides 'BIT $07A2' A2 07 LDX #7 CA DEX 10 FA BPL *-4 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 26 LDA #38 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 84 xx STY @zptemp A0 0E LDY #14 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
27 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
28 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
29 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
30 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
40 bytes
18 ... CLC × 38 90 00 BCC *+2	Clobbers C
B8 ... CLV × 38 50 00 BVC *+2	Clobbers V
EA ... NOP × 38 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 38 04 04 NOP $04	Requires support for unofficial opcodes
41 bytes
EA ... NOP × 38 4C xx xx JMP *+3	Not relocatable code

80 cycles

5 bytes
A9 35 LDA #53 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 88 LDX #136 ;hides 'DEY' EA NOP CA DEX 30 FB BMI *-3	Clobbers X, Y, and Z&N
68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$08' 08 PHP ;first loop only 30 FC BMI *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
68 PLA A2 0F LDX #15 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 0F LDY #15 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 0F LDX #15 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 0F LDY #15 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 2E LDA #46 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 2E LDA #46 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 0E LDX #14 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 0E LDY #14 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
9 bytes
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 27 LDA #39 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 0E LDX #14 CA DEX D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; requires @zptemp; and writes in stack
48 PHA 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; requires support for unofficial opcodes; and writes in stack
12 bytes
08 PHP 48 PHA 38 SEC A9 08 LDA #8 EA NOP E9 01 SBC #1 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
27 bytes
EA NOP 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
40 bytes
EA ... NOP × 40	No requirements

81 cycles

5 bytes
A2 0F LDX #15 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 10 LDY #16 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 36 LDA #54 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 48 PHA 30 FB BMI *-3	Clobbers A, S, Z&N, C, and V; and writes in stack
7 bytes
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only E6 xx INC @zptemp 90 FA BCC *-4	Clobbers A, Z&N, C, and V; and requires @zptemp
48 PHA A9 2F LDA #47 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 2F LDA #47 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 04 04 NOP $04 30 FA BMI *-4	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 48 PHA 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
38 SEC A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4	Clobbers A, Z&N, C, and V
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts15 90 FA BCC *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 04 04 NOP $04 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
18 CLC A9 2A LDA #$2A ;hides 'ROL A' EA NOP 00 00 BRK 0 90 FA BCC *-4	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP A2 0E LDX #14 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 0E LDY #14 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 08 PHP 28 PLP 10 F9 BPL *-5	Clobbers A, Z&N, and C; and writes in stack
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 4C xx xx JMP *+3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and not relocatable code
08 PHP A6 A6 LDX $A6 A2 0E LDX #14 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 0E LDY #14 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 0E LDX #14 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 28 LDA #40 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 PHA 08 PHP A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 28 PLP	Clobbers A, and S; and writes in stack
EA NOP 68 PLA 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
C5 C5 CMP $C5 48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 0E LDY #14 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' F6 F6 INC $F6,X 90 FB BCC *-3 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 0C LDY #12 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
28 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
29 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
30 bytes
36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
41 bytes
18 ... CLC × 39 90 00 BCC *+2	Clobbers C
B8 ... CLV × 39 50 00 BVC *+2	Clobbers V
EA ... NOP × 39 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 39 04 04 NOP $04	Requires support for unofficial opcodes
42 bytes
EA ... NOP × 39 4C xx xx JMP *+3	Not relocatable code

82 cycles

5 bytes
A9 37 LDA #55 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 08 LDX #8 68 PLA CA DEX 10 FC BPL *-2	Clobbers A, X, S, and Z&N
48 PHA A0 88 LDY #136 ;hides 'DEY' 48 PHA 30 FC BMI *-2	Clobbers Y, S, and Z&N; and writes in stack
A0 09 LDY #9 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
A2 08 LDX #8 EA ... NOP × 2 CA DEX 10 FB BPL *-3	Clobbers X, and Z&N
A0 09 LDY #9 EA ... NOP × 2 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N
48 PHA A9 30 LDA #48 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 30 LDA #48 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 48 PHA 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
98 TYA A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
48 PHA 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 0E LDX #14 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 0E LDY #14 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 0F LDY #15 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 29 LDA #41 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
28 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N
41 bytes
EA ... NOP × 41	No requirements

83 cycles

5 bytes
A9 38 LDA #56 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, V, and D
EA NOP A2 0F LDX #15 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA NOP A0 10 LDY #16 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 10 LDA #16 E9 01 SBC #1 D0 FC BNE *-2	Clobbers A, Z&N, C, and V
08 PHP A2 0F LDX #15 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0F LDY #15 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 31 LDA #49 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 31 LDA #49 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
98 TYA A0 88 LDY #136 ;hides 'DEY' 48 PHA 30 FC BMI *-2 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
8 bytes
98 TYA A0 88 LDY #136 ;hides 'DEY' 85 xx STA @zptemp 30 FB BMI *-3 A8 TAY	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 88 LDY #136 ;hides 'DEY' 04 04 NOP $04 30 FB BMI *-3 A8 TAY	Clobbers A, and Z&N; and requires support for unofficial opcodes
9 bytes
A5 A5 LDA $A5 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 2A LDA #42 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; requires support for unofficial opcodes; and writes in stack
10 bytes
E6 xx INC @zptemp 48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
08 PHP E6 xx INC @zptemp A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 28 PLP	Clobbers A; requires @zptemp; and writes in stack
04 04 NOP $04 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
04 04 NOP $04 08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
00 00 BRK 0 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
48 ... PHA × 2 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
48 PHA 08 PHP 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY 28 PLP	Clobbers A, and S; and writes in stack
11 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 38 SEC 10 FA BPL *-4 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A0 0E LDY #14 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 0E LDY #14 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
85 xx STA @zptemp 68 PLA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 A5 xx LDA @zptemp	Clobbers S, Z&N, C, and V; and requires @zptemp, and support for unofficial opcodes
12 bytes
EA ... NOP × 3 84 xx STY @zptemp A0 0E LDY #14 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
29 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
30 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
31 bytes
EA NOP 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
42 bytes
18 ... CLC × 40 90 00 BCC *+2	Clobbers C
B8 ... CLV × 40 50 00 BVC *+2	Clobbers V
EA ... NOP × 40 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 40 04 04 NOP $04	Requires support for unofficial opcodes
43 bytes
EA ... NOP × 40 4C xx xx JMP *+3	Not relocatable code

84 cycles

5 bytes
A9 39 LDA #57 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 0F LDX #15 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 10 LDY #16 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 0F LDX #15 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 10 LDY #16 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12; and writes in stack
48 PHA A9 32 LDA #50 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 32 LDA #50 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 ... PLA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$08' 08 PHP ;first loop only 30 FC BMI *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
8 bytes
A9 0A LDA #$0A ;hides 'ASL A' 08 PHP E6 xx INC @zptemp 28 PLP 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires @zptemp; and writes in stack
00 00 BRK 0 A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
68 PLA 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 0E LDX #14 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 0E LDX #14 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 0E LDY #14 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
08 PHP F6 F6 INC $F6,X A0 0E LDY #14 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 2B LDA #43 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 08 PHP A2 0E LDX #14 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 0E LDY #14 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 08 PHP A2 0E LDX #14 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 3 08 PHP A0 0E LDY #14 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
28 bytes
36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N
42 bytes
EA ... NOP × 42	No requirements

85 cycles

5 bytes
A9 3A LDA #58 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 0C LDX #12 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
48 PHA A9 33 LDA #51 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 33 LDA #51 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP A2 0B LDX #11 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 0E LDA #14 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 0E LDA #14 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 2C LDA #44 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 48 PHA 30 FC BMI *-2 A4 xx LDY @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
10 bytes
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 04 04 NOP $04 30 FB BMI *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
11 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 0F LDX #15 CA DEX D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
29 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
30 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
31 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
32 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
43 bytes
18 ... CLC × 41 90 00 BCC *+2	Clobbers C
B8 ... CLV × 41 50 00 BVC *+2	Clobbers V
EA ... NOP × 41 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 41 04 04 NOP $04	Requires support for unofficial opcodes
44 bytes
EA ... NOP × 41 4C xx xx JMP *+3	Not relocatable code

86 cycles

5 bytes
A2 11 LDX #17 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 11 LDY #17 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 3B LDA #59 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
48 PHA A9 34 LDA #52 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 34 LDA #52 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, V, and D; and writes in stack
8 bytes
A5 A5 LDA $A5 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, V, and D
08 PHP A0 88 LDY #136 ;hides 'DEY' 85 xx STA @zptemp 30 FB BMI *-3 28 PLP	Clobbers Y; requires @zptemp; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12; and writes in stack
08 PHP A0 88 LDY #136 ;hides 'DEY' 04 04 NOP $04 30 FB BMI *-3 28 PLP	Clobbers Y; requires support for unofficial opcodes; and writes in stack
00 00 BRK 0 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 48 PHA 30 FC BMI *-2 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
48 PHA 08 PHP A2 0F LDX #15 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 0F LDY #15 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 28 PLP	Clobbers A; and writes in stack
98 TYA A0 09 LDY #9 EA ... NOP × 2 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, and Z&N
08 PHP A6 A6 LDX $A6 A2 0F LDX #15 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 0F LDY #15 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
08 PHP 48 PHA A9 2D LDA #45 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 04 04 NOP $04 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires support for unofficial opcodes; and writes in stack
10 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 08 PHP 28 PLP 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 0F LDY #15 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 0C LDY #12 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
29 bytes
EA NOP 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N
43 bytes
EA ... NOP × 43	No requirements

87 cycles

5 bytes
A9 3C LDA #60 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 4A LDA #$4A ;hides 'LSR A' 48 ... PHA × 2 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
A2 F8 LDX #248 ;hides 'SED' 68 PLA E8 INX D0 FB BNE *-3	Clobbers A, X, S, Z&N, and D
A0 F8 LDY #248 ;hides 'SED' 68 PLA C8 INY D0 FB BNE *-3	Clobbers A, Y, S, Z&N, and D
7 bytes
A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 3 D0 FA BNE *-4	Clobbers A, Z&N, and C
EA NOP A2 0C LDX #12 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
EA NOP A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
48 PHA A9 35 LDA #53 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 35 LDA #53 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 88 LDX #136 ;hides 'DEY' EA NOP CA DEX 30 FB BMI *-3 28 PLP	Clobbers X, and Y; and writes in stack
9 bytes
48 PHA 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 0F LDX #15 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 0F LDY #15 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 10 LDY #16 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 2E LDA #46 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
11 bytes
08 PHP 48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
30 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
31 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
33 bytes
EA ... NOP × 3 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
44 bytes
18 ... CLC × 42 90 00 BCC *+2	Clobbers C
B8 ... CLV × 42 50 00 BVC *+2	Clobbers V
EA ... NOP × 42 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 42 04 04 NOP $04	Requires support for unofficial opcodes
45 bytes
EA ... NOP × 42 4C xx xx JMP *+3	Not relocatable code

88 cycles

5 bytes
A9 3D LDA #61 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, V, and D
EA NOP A2 11 LDX #17 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 11 LDY #17 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 10 LDA #16 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
08 PHP A2 0F LDX #15 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 10 LDY #16 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 36 LDA #54 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 36 LDA #54 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
48 PHA A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only E6 xx INC @zptemp 90 FA BCC *-4 68 PLA	Clobbers Z&N, C, and V; requires @zptemp; and writes in stack
08 PHP A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only E6 xx INC @zptemp 90 FA BCC *-4 28 PLP	Clobbers A; requires @zptemp; and writes in stack
08 PHP 48 PHA A9 2F LDA #47 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 04 04 NOP $04 30 FA BMI *-4 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 04 04 NOP $04 30 FA BMI *-4 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
10 bytes
48 PHA 38 SEC A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 28 PLP	Clobbers A; and writes in stack
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts15 90 FA BCC *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts15; and writes in stack
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 04 04 NOP $04 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires support for unofficial opcodes; and writes in stack
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' EA NOP 00 00 BRK 0 90 FA BCC *-4 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' 48 PHA 30 FC BMI *-2 A4 xx LDY @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
11 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 08 PHP 28 PLP 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
84 xx STY @zptemp A0 09 LDY #9 EA ... NOP × 2 88 DEY D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY 68 PLA	Clobbers Z&N; requires @ptrtemp; and writes in stack
48 PHA 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
08 PHP 48 PHA A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
30 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
44 bytes
EA ... NOP × 44	No requirements

89 cycles

5 bytes
A9 3E LDA #62 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 0A LDX #10 ;hides 'ASL A' EA NOP CA DEX D0 FB BNE *-3	Clobbers A, X, Z&N, and C
A0 88 LDY #136 ;hides 'DEY' EA ... NOP × 2 30 FB BMI *-3	Clobbers Y, and Z&N
A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
A2 0B LDX #11 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 11 LDX #17 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only F6 F6 INC $F6,X 90 FA BCC *-4	Clobbers A, Z&N, C, and V; and requires @zptemp, and writable $00-$FF
48 PHA A9 37 LDA #55 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 37 LDA #55 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
38 SEC A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 2 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
98 TYA A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
08 PHP A2 08 LDX #8 EA ... NOP × 2 CA DEX 10 FB BPL *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 09 LDY #9 EA ... NOP × 2 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 30 LDA #48 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 84 xx STY @zptemp A0 10 LDY #16 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
31 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
32 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
34 bytes
26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
45 bytes
18 ... CLC × 43 90 00 BCC *+2	Clobbers C
B8 ... CLV × 43 50 00 BVC *+2	Clobbers V
EA ... NOP × 43 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 43 04 04 NOP $04	Requires support for unofficial opcodes
46 bytes
EA ... NOP × 43 4C xx xx JMP *+3	Not relocatable code

90 cycles

5 bytes
A9 3F LDA #63 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 11 LDX #17 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 11 LDY #17 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 11 LDX #17 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 11 LDY #17 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 38 LDA #56 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 38 LDA #56 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 0F LDX #15 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 10 LDY #16 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 10 LDA #16 E9 01 SBC #1 D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 48 PHA A9 31 LDA #49 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 85 xx STA @zptemp 30 FB BMI *-3 A8 TAY 68 PLA	Clobbers Z&N; requires @zptemp; and writes in stack
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' 04 04 NOP $04 30 FB BMI *-3 A8 TAY 68 PLA	Clobbers Z&N; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 2 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
86 xx STX @zptemp A6 A6 LDX $A6 A2 0F LDX #15 CA DEX 10 FD BPL *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; requires support for unofficial opcodes; and writes in stack
12 bytes
08 PHP 48 PHA E6 xx INC @zptemp A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA 28 PLP	Requires @zptemp; and writes in stack
04 04 NOP $04 08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
08 PHP 48 PHA A5 A5 LDA $A5 98 TYA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
30 bytes
36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
45 bytes
EA ... NOP × 45	No requirements

91 cycles

5 bytes
A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 11 LDY #17 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 40 LDA #64 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA ... NOP × 2 30 FA BMI *-4	Clobbers A, Z&N, C, and V
48 PHA A9 39 LDA #57 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 39 LDA #57 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
68 PLA A9 4A LDA #$4A ;hides 'LSR A' 48 ... PHA × 2 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
68 PLA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 3 D0 FA BNE *-4	Clobbers A, S, Z&N, and C
48 PHA 08 PHP A2 0F LDX #15 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 10 LDY #16 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
EA NOP 98 TYA A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
08 PHP A6 A6 LDX $A6 A2 0F LDX #15 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 10 LDY #16 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires @rts12; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4 28 PLP	Clobbers A; requires @rts12; and writes in stack
08 PHP 48 PHA A9 32 LDA #50 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
84 xx STY @zptemp A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 08 PHP E6 xx INC @zptemp 28 PLP 10 F9 BPL *-5 28 PLP	Clobbers A; requires @zptemp; and writes in stack
00 00 BRK 0 48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
00 00 BRK 0 08 PHP A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 04 04 NOP $04 30 FA BMI *-4 68 PLA	Clobbers S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 04 04 NOP $04 30 FA BMI *-4 28 PLP	Clobbers A, and S; requires support for unofficial opcodes; and writes in stack
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 0E LDY #14 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
31 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
32 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
33 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
34 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
46 bytes
18 ... CLC × 44 90 00 BCC *+2	Clobbers C
B8 ... CLV × 44 50 00 BVC *+2	Clobbers V
EA ... NOP × 44 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 44 04 04 NOP $04	Requires support for unofficial opcodes
47 bytes
EA ... NOP × 44 4C xx xx JMP *+3	Not relocatable code

92 cycles

5 bytes
A9 41 LDA #65 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 0D LDX #13 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 0C LDY #12 EA NOP 88 DEY 10 FC BPL *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 3A LDA #58 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 3A LDA #58 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 PLA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, V, and D
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3	Clobbers A, S, Z&N, and C; requires dummy interrupt handler; and writes in stack
8 bytes
EA NOP 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 0C LDX #12 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
84 xx STY @zptemp A0 11 LDY #17 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 33 LDA #51 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 0E LDA #14 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
31 bytes
EA NOP 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
46 bytes
EA ... NOP × 46	No requirements

93 cycles

5 bytes
A9 42 LDA #66 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 11 LDY #17 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 11 LDA #17 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
08 PHP A2 11 LDX #17 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 11 LDY #17 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 3B LDA #59 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 3B LDA #59 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3	Clobbers A, S, Z&N, and C; requires dummy interrupt handler; and writes in stack
8 bytes
98 TYA A0 88 LDY #136 ;hides 'DEY' EA ... NOP × 2 30 FB BMI *-3 A8 TAY	Clobbers A, and Z&N
9 bytes
08 PHP 48 PHA A9 34 LDA #52 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, V, and D; and writes in stack
48 PHA 08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; and writes in stack
10 bytes
C5 C5 CMP $C5 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
08 PHP A5 A5 LDA $A5 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires @rts12; and writes in stack
00 00 BRK 0 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
48 ... PHA × 2 38 SEC A9 10 LDA #16 E9 01 SBC #1 D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
85 xx STA @zptemp A9 4A LDA #$4A ;hides 'LSR A' 48 ... PHA × 2 D0 FB BNE *-3 A5 xx LDA @zptemp	Clobbers S, Z&N, and C; requires @zptemp; and writes in stack
11 bytes
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 68 PLA 28 PLP	Writes in stack
EA NOP 84 xx STY @zptemp A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
32 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
33 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
34 bytes
36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
47 bytes
18 ... CLC × 45 90 00 BCC *+2	Clobbers C
B8 ... CLV × 45 50 00 BVC *+2	Clobbers V
EA ... NOP × 45 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 45 04 04 NOP $04	Requires support for unofficial opcodes
48 bytes
EA ... NOP × 45 4C xx xx JMP *+3	Not relocatable code

94 cycles

5 bytes
A9 43 LDA #67 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 11 LDY #17 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 11 LDY #17 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
48 PHA A9 3C LDA #60 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 3C LDA #60 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
A9 0A LDA #$0A ;hides 'ASL A' 08 PHP \ × 2 28 PLP / 10 F9 BPL *-5	Clobbers A, Z&N, and C; and writes in stack
38 SEC A9 0D LDA #13 EA NOP E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
68 PLA 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 3 D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 3 D0 FA BNE *-4 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA NOP 08 PHP A2 0C LDX #12 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 35 LDA #53 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 84 xx STY @zptemp A0 11 LDY #17 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
32 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N
47 bytes
EA ... NOP × 47	No requirements

95 cycles

5 bytes
A9 44 LDA #68 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; and writes in stack
68 PLA A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 11 LDY #17 88 DEY 10 FD BPL *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 11 LDY #17 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 3D LDA #61 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 3D LDA #61 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 11 LDX #17 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 11 LDY #17 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 10 LDA #16 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 48 PHA A9 36 LDA #54 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
84 xx STY @zptemp A0 88 LDY #136 ;hides 'DEY' EA ... NOP × 2 30 FB BMI *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
48 ... PHA × 2 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 48 PHA A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only E6 xx INC @zptemp 90 FA BCC *-4 68 PLA 28 PLP	Requires @zptemp; and writes in stack
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 04 04 NOP $04 30 FA BMI *-4 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
12 bytes
08 PHP 48 PHA 38 SEC A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 68 PLA 28 PLP	Writes in stack
33 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
34 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
35 bytes
EA NOP 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
48 bytes
18 ... CLC × 46 90 00 BCC *+2	Clobbers C
B8 ... CLV × 46 50 00 BVC *+2	Clobbers V
EA ... NOP × 46 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 46 04 04 NOP $04	Requires support for unofficial opcodes
49 bytes
EA ... NOP × 46 4C xx xx JMP *+3	Not relocatable code

96 cycles

5 bytes
A2 13 LDX #19 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 12 LDY #18 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 45 LDA #69 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
48 PHA A9 3E LDA #62 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 3E LDA #62 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
98 TYA A0 0C LDY #12 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY	Clobbers A, and Z&N
08 PHP A2 0A LDX #10 ;hides 'ASL A' EA NOP CA DEX D0 FB BNE *-3 28 PLP	Clobbers A, and X; and writes in stack
08 PHP A0 88 LDY #136 ;hides 'DEY' EA ... NOP × 2 30 FB BMI *-3 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP A2 11 LDX #17 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
9 bytes
08 PHP A2 0B LDX #11 24 24 BIT $24 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
48 PHA A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only F6 F6 INC $F6,X 90 FA BCC *-4 68 PLA	Clobbers Z&N, C, and V; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only F6 F6 INC $F6,X 90 FA BCC *-4 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 37 LDA #55 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
11 bytes
EA ... NOP × 2 84 xx STY @zptemp A0 11 LDY #17 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
08 PHP 48 PHA 98 TYA A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
32 bytes
36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N
48 bytes
EA ... NOP × 48	No requirements

97 cycles

5 bytes
A9 46 LDA #70 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 0C LDX #12 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
A0 0C LDY #12 48 PHA 88 DEY D0 FC BNE *-2	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
38 SEC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; and writes in stack
A2 07 LDX #7 08 PHP 28 PLP CA DEX 10 FB BPL *-3	Clobbers X, and Z&N; and writes in stack
A2 0C LDX #12 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3	Clobbers X, Z&N, and C
A2 0C LDX #12 24 24 BIT $24 CA DEX D0 FB BNE *-3	Clobbers X, Z&N, and V
A2 0C LDX #12 A5 A5 LDA $A5 CA DEX D0 FB BNE *-3	Clobbers A, X, and Z&N
A0 08 LDY #8 08 PHP 28 PLP 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N; and writes in stack
A0 0C LDY #12 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3	Clobbers Y, Z&N, and C
A0 0C LDY #12 24 24 BIT $24 88 DEY D0 FB BNE *-3	Clobbers Y, Z&N, and V
A0 0C LDY #12 A5 A5 LDA $A5 88 DEY D0 FB BNE *-3	Clobbers A, Y, and Z&N
A2 0C LDX #12 A4 A4 LDY $A4 CA DEX D0 FB BNE *-3	Clobbers X, Y, and Z&N
A2 0C LDX #12 85 xx STA @zptemp CA DEX D0 FB BNE *-3	Clobbers X, and Z&N; and requires @zptemp
A2 12 LDX #18 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 0C LDY #12 85 xx STA @zptemp 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N; and requires @zptemp
A0 12 LDY #18 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
48 PHA A9 3F LDA #63 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 3F LDA #63 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A2 0C LDX #12 04 04 NOP $04 CA DEX D0 FB BNE *-3	Clobbers X, and Z&N; and requires support for unofficial opcodes
A0 0C LDY #12 04 04 NOP $04 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N; and requires support for unofficial opcodes
8 bytes
EA NOP 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 11 LDY #17 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 11 LDX #17 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 11 LDY #17 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 11 LDY #17 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 38 LDA #56 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
33 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
34 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
35 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
36 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
49 bytes
18 ... CLC × 47 90 00 BCC *+2	Clobbers C
B8 ... CLV × 47 50 00 BVC *+2	Clobbers V
EA ... NOP × 47 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 47 04 04 NOP $04	Requires support for unofficial opcodes
50 bytes
EA ... NOP × 47 4C xx xx JMP *+3	Not relocatable code

98 cycles

5 bytes
A9 47 LDA #71 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 13 LDX #19 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 12 LDY #18 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FC BNE *-2	Clobbers A, Z&N, C, and V
08 PHP A2 12 LDX #18 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 11 LDY #17 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 40 LDA #64 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 40 LDA #64 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; and writes in stack
48 PHA 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA ... NOP × 2 30 FA BMI *-4 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA ... NOP × 2 30 FA BMI *-4 28 PLP	Clobbers A; and writes in stack
A5 A5 LDA $A5 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 39 LDA #57 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
10 bytes
84 xx STY @zptemp A0 0C LDY #12 EA NOP 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
EA NOP 48 PHA 98 TYA A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4 68 PLA 28 PLP	Requires @rts12; and writes in stack
12 bytes
08 PHP 84 xx STY @zptemp A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp 28 PLP	Requires @zptemp; and writes in stack
00 00 BRK 0 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 2 D0 FB BNE *-3 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 04 04 NOP $04 30 FA BMI *-4 68 PLA 28 PLP	Clobbers S; requires support for unofficial opcodes; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 98 TYA A0 0F LDY #15 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
33 bytes
EA NOP 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N
49 bytes
EA ... NOP × 49	No requirements

99 cycles

5 bytes
A9 48 LDA #72 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 0E LDX #14 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 0E LDY #14 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
48 PHA A9 41 LDA #65 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 41 LDA #65 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 38 SEC 10 FA BPL *-4	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
68 PLA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
38 ... SEC × 2 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; and writes in stack
08 PHP A2 0D LDX #13 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0C LDY #12 EA NOP 88 DEY 10 FC BPL *-2 28 PLP	Clobbers Y; and writes in stack
68 PLA 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 3A LDA #58 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3 68 PLA	Clobbers S, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3 28 PLP	Clobbers A, and S; requires dummy interrupt handler; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 84 xx STY @zptemp A0 11 LDY #17 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 10 LDY #16 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
34 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
35 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
37 bytes
EA ... NOP × 3 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
50 bytes
18 ... CLC × 48 90 00 BCC *+2	Clobbers C
B8 ... CLV × 48 50 00 BVC *+2	Clobbers V
EA ... NOP × 48 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 48 04 04 NOP $04	Requires support for unofficial opcodes
51 bytes
EA ... NOP × 48 4C xx xx JMP *+3	Not relocatable code

100 cycles

5 bytes
A9 49 LDA #73 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 0B LDX #11 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
A0 0B LDY #11 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 13 LDX #19 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 12 LDY #18 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 42 LDA #66 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 42 LDA #66 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 12 LDX #18 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 11 LDY #17 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 11 LDA #17 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 11 LDA #17 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 3B LDA #59 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 88 LDY #136 ;hides 'DEY' EA ... NOP × 2 30 FB BMI *-3 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
11 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 12 LDX #18 CA DEX D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
08 PHP 48 PHA A5 A5 LDA $A5 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
34 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
50 bytes
EA ... NOP × 50	No requirements

101 cycles

5 bytes
A2 14 LDX #20 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 13 LDY #19 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 4A LDA #74 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
48 PHA A9 43 LDA #67 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 43 LDA #67 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only EA NOP D0 FB BNE *-3	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA NOP 48 PHA 30 FA BMI *-4	Clobbers A, S, Z&N, C, and V; and writes in stack
8 bytes
38 SEC A9 0E LDA #14 EA NOP E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 18 CLC 10 FA BPL *-4	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
98 TYA A0 0C LDY #12 48 PHA 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
48 PHA 08 PHP A2 12 LDX #18 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 11 LDY #17 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
98 TYA A0 08 LDY #8 08 PHP 28 PLP 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, and Z&N; and writes in stack
98 TYA A0 0C LDY #12 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, Z&N, and C
98 TYA A0 0C LDY #12 24 24 BIT $24 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, Z&N, and V
08 PHP A6 A6 LDX $A6 A2 12 LDX #18 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 11 LDY #17 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
98 TYA A0 0C LDY #12 85 xx STA @zptemp 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 12 LDY #18 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 10 FA BPL *-4 28 PLP	Clobbers A; requires @rts12, and @rts14; and writes in stack
08 PHP 48 PHA A9 3C LDA #60 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
98 TYA A0 0C LDY #12 04 04 NOP $04 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, and Z&N; and requires support for unofficial opcodes
EA NOP 68 PLA 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP \ × 2 28 PLP / 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 38 SEC A9 0D LDA #13 EA NOP E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
11 bytes
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' EA ... NOP × 3 D0 FA BNE *-4 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 11 LDY #17 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
35 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
36 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
38 bytes
26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
51 bytes
18 ... CLC × 49 90 00 BCC *+2	Clobbers C
B8 ... CLV × 49 50 00 BVC *+2	Clobbers V
EA ... NOP × 49 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 49 04 04 NOP $04	Requires support for unofficial opcodes
52 bytes
EA ... NOP × 49 4C xx xx JMP *+3	Not relocatable code

102 cycles

5 bytes
A9 4B LDA #75 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
A2 13 LDX #19 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 13 LDX #19 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 13 LDY #19 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 12 LDY #18 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 44 LDA #68 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 44 LDA #68 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A2 13 LDX #19 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
EA NOP A2 0B LDX #11 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
48 ... PHA × 2 A0 12 LDY #18 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
EA NOP A0 0B LDY #11 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
8 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
EA NOP 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
A6 A6 LDX $A6 A2 0E LDX #14 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 0E LDY #14 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP A2 12 LDX #18 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 11 LDY #17 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 12 LDY #18 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 3D LDA #61 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Writes in stack
34 bytes
36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
51 bytes
EA ... NOP × 51	No requirements

103 cycles

5 bytes
A9 4C LDA #76 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 14 LDX #20 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 13 LDY #19 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
18 CLC A9 69 LDA #$69 ;hides 'ADC #$08' 08 PHP ;first loop only 90 FC BCC *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
7 bytes
38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
08 PHP A2 13 LDX #19 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 12 LDY #18 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 45 LDA #69 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 45 LDA #69 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 4A LDA #$4A ;hides 'LSR A' 48 ... PHA × 2 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
98 TYA A0 0E LDY #14 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
08 PHP 48 PHA A9 3E LDA #62 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 0C LDY #12 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0C LDY #12 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
11 bytes
84 xx STY @zptemp A0 0C LDY #12 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N, and C; and requires @zptemp
84 xx STY @zptemp A0 0C LDY #12 24 24 BIT $24 88 DEY D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N, and V; and requires @zptemp
84 xx STY @zptemp A0 12 LDY #18 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
08 PHP 48 PHA A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only F6 F6 INC $F6,X 90 FA BCC *-4 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
F6 F6 INC $F6,X 84 xx STY @zptemp A0 11 LDY #17 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
84 xx STY @zptemp A0 0C LDY #12 04 04 NOP $04 88 DEY D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
12 bytes
08 PHP 48 PHA 98 TYA A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
E6 xx INC @zptemp 84 xx STY @zptemp A0 0C LDY #12 EA NOP 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
35 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
36 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
37 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
38 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
52 bytes
18 ... CLC × 50 90 00 BCC *+2	Clobbers C
B8 ... CLV × 50 50 00 BVC *+2	Clobbers V
EA ... NOP × 50 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 50 04 04 NOP $04	Requires support for unofficial opcodes
53 bytes
EA ... NOP × 50 4C xx xx JMP *+3	Not relocatable code

104 cycles

5 bytes
A9 4D LDA #77 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 14 LDX #20 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 13 LDY #19 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 14 LDX #20 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 13 LDY #19 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 46 LDA #70 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 46 LDA #70 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 48 PHA 00 00 BRK 0 10 FA BPL *-4	Clobbers A, S, Z&N, and C; requires dummy interrupt handler; and writes in stack
8 bytes
A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 38 SEC 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 00 00 BRK 0 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires @zptemp, and dummy interrupt handler; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 00 00 BRK 0 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
68 PLA 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
48 PHA 38 SEC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 38 SEC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 0C LDX #12 24 24 BIT $24 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0C LDY #12 24 24 BIT $24 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 3F LDA #63 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 84 xx STY @zptemp A0 12 LDY #18 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
35 bytes
EA NOP 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
52 bytes
EA ... NOP × 52	No requirements

105 cycles

5 bytes
A9 4E LDA #78 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 0D LDX #13 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
68 PLA A2 14 LDX #20 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
A0 0C LDY #12 48 PHA 88 DEY 10 FC BPL *-2	Clobbers Y, S, and Z&N; and writes in stack
68 PLA A0 13 LDY #19 88 DEY 10 FD BPL *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 14 LDX #20 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 13 LDY #19 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 47 LDA #71 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 47 LDA #71 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 13 LDX #19 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 12 LDY #18 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 40 LDA #64 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; and writes in stack
10 bytes
C5 C5 CMP $C5 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
84 xx STY @zptemp A0 0E LDY #14 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
48 ... PHA × 2 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA ... NOP × 2 30 FA BMI *-4 68 PLA 28 PLP	Writes in stack
36 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
37 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
38 bytes
36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
53 bytes
18 ... CLC × 51 90 00 BCC *+2	Clobbers C
B8 ... CLV × 51 50 00 BVC *+2	Clobbers V
EA ... NOP × 51 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 51 04 04 NOP $04	Requires support for unofficial opcodes
54 bytes
EA ... NOP × 51 4C xx xx JMP *+3	Not relocatable code

106 cycles

5 bytes
A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 4F LDA #79 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$08' 08 PHP ;first loop only EA NOP 30 FB BMI *-3	Clobbers A, S, Z&N, C, and V; and writes in stack
7 bytes
48 PHA A9 48 LDA #72 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 48 LDA #72 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP A2 0E LDX #14 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0E LDY #14 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 48 ... PHA × 2 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
9 bytes
A5 A5 LDA $A5 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
8C TXA A2 13 LDX #19 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 13 LDY #19 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts15; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 10 FA BPL *-4 28 PLP	Clobbers A; requires @rts12, and @rts15; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 18 CLC 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP 48 PHA A9 41 LDA #65 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 38 SEC 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 38 SEC 10 FA BPL *-4 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
EA NOP 68 PLA 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
48 PHA 38 ... SEC × 2 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 38 ... SEC × 2 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
A5 A5 LDA $A5 98 TYA A0 0E LDY #14 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 11 LDY #17 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 12 LDY #18 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 10 FB BPL *-3 68 PLA 28 PLP	Clobbers S; requires dummy interrupt handler; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 11 LDY #17 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
36 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N
53 bytes
EA ... NOP × 53	No requirements

107 cycles

5 bytes
A9 50 LDA #80 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 18 LDX #24 ;hides 'CLC' CA ... DEX × 2 D0 FB BNE *-3	Clobbers X, and Z&N
A0 18 LDY #24 ;hides 'CLC' 88 ... DEY × 2 D0 FB BNE *-3	Clobbers Y, and Z&N
7 bytes
48 PHA A9 49 LDA #73 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 49 LDA #73 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 PLA 18 CLC A9 69 LDA #$69 ;hides 'ADC #$08' 08 PHP ;first loop only 90 FC BCC *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
8 bytes
EA NOP 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
9 bytes
48 PHA 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 13 LDX #19 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 12 LDY #18 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 13 LDY #19 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 42 LDA #66 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 11 LDA #17 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
37 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
38 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
39 bytes
EA NOP 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
54 bytes
18 ... CLC × 52 90 00 BCC *+2	Clobbers C
B8 ... CLV × 52 50 00 BVC *+2	Clobbers V
EA ... NOP × 52 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 52 04 04 NOP $04	Requires support for unofficial opcodes
55 bytes
EA ... NOP × 52 4C xx xx JMP *+3	Not relocatable code

108 cycles

5 bytes
A9 51 LDA #81 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA NOP A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 14 LDA #20 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
08 PHP A2 14 LDX #20 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 13 LDY #19 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 4A LDA #74 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 4A LDA #74 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
00 00 BRK 0 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 43 LDA #67 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only EA NOP D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only EA NOP D0 FB BNE *-3 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
10 bytes
48 PHA 38 SEC A9 0E LDA #14 EA NOP E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 0E LDA #14 EA NOP E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
F6 F6 INC $F6,X 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts15; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 18 CLC 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
48 ... PHA × 3 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; and writes in stack
11 bytes
48 PHA 98 TYA A0 08 LDY #8 08 PHP 28 PLP 88 DEY D0 FB BNE *-3 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
84 xx STY @zptemp A0 13 LDY #19 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 12 LDY #18 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 10 FA BPL *-4 68 PLA 28 PLP	Requires @rts12, and @rts14; and writes in stack
12 bytes
08 PHP 48 PHA 38 SEC A9 0D LDA #13 EA NOP E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
86 xx STX @zptemp A6 A6 LDX $A6 A2 0E LDX #14 EA NOP CA DEX D0 FC BNE *-2 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
36 bytes
36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N
54 bytes
EA ... NOP × 54	No requirements

109 cycles

5 bytes
A9 52 LDA #82 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
A2 0C LDX #12 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
48 PHA A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
A0 0C LDY #12 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
A6 A6 LDX $A6 A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 4B LDA #75 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 4B LDA #75 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 90 FB BCC *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$08' 08 PHP ;first loop only EA NOP 30 FB BMI *-3	Clobbers A, S, Z&N, C, and V; and writes in stack
8 bytes
A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 38 SEC 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
18 CLC A9 74 LDA #116 ;hides 'NOP zp,X' EA NOP 69 01 ADC #1 10 FA BPL *-4	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
68 PLA 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 13 LDX #19 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 13 LDX #19 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 13 LDY #19 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
08 PHP F6 F6 INC $F6,X A0 12 LDY #18 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 44 LDA #68 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 08 PHP A2 13 LDX #19 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 12 LDY #18 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
EA NOP 84 xx STY @zptemp A0 13 LDY #19 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
37 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
38 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
39 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
40 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
55 bytes
18 ... CLC × 53 90 00 BCC *+2	Clobbers C
B8 ... CLV × 53 50 00 BVC *+2	Clobbers V
EA ... NOP × 53 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 53 04 04 NOP $04	Requires support for unofficial opcodes
56 bytes
EA ... NOP × 53 4C xx xx JMP *+3	Not relocatable code

110 cycles

5 bytes
A9 53 LDA #83 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers A, X, S, and Z&N
68 PLA A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 4C LDA #76 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 4C LDA #76 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 14 LDX #20 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 13 LDY #19 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 45 LDA #69 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 0E LDY #14 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
11 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 14 LDX #20 CA DEX D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
08 PHP 48 PHA 98 TYA A0 0C LDY #12 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
37 bytes
EA NOP 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N
55 bytes
EA ... NOP × 55	No requirements

111 cycles

5 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V
A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and writes in stack
48 PHA A9 4D LDA #77 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 4D LDA #77 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
98 TYA A0 18 LDY #24 ;hides 'CLC' 88 ... DEY × 2 D0 FB BNE *-3 A8 TAY	Clobbers A, and Z&N
48 PHA 08 PHP A2 14 LDX #20 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 13 LDY #19 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
08 PHP A6 A6 LDX $A6 A2 14 LDX #20 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 13 LDY #19 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 46 LDA #70 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 38 SEC 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 38 SEC 10 F9 BPL *-5 28 PLP	Clobbers A; requires @rts12, and @rts14; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 00 00 BRK 0 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; requires @zptemp, and dummy interrupt handler; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 00 00 BRK 0 10 F9 BPL *-5 28 PLP	Clobbers A; requires @zptemp, and dummy interrupt handler; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 00 00 BRK 0 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 00 00 BRK 0 10 F9 BPL *-5 28 PLP	Clobbers A; requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
84 xx STY @zptemp A0 0C LDY #12 48 PHA 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
48 ... PHA × 2 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only EA NOP D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only EA NOP D0 FB BNE *-3 28 PLP	Clobbers A, and S; requires support for unofficial opcodes; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 13 LDY #19 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
38 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
39 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
41 bytes
EA ... NOP × 3 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
56 bytes
18 ... CLC × 54 90 00 BCC *+2	Clobbers C
B8 ... CLV × 54 50 00 BVC *+2	Clobbers V
EA ... NOP × 54 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 54 04 04 NOP $04	Requires support for unofficial opcodes
57 bytes
EA ... NOP × 54 4C xx xx JMP *+3	Not relocatable code

112 cycles

5 bytes
A9 55 LDA #85 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
A2 15 LDX #21 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 15 LDX #21 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 15 LDY #21 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 4E LDA #78 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 4E LDA #78 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
EA NOP 68 PLA A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers A, X, S, and Z&N
48 ... PHA × 2 A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
EA NOP 68 PLA A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers A, Y, S, and Z&N
8 bytes
EA NOP 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 14 LDX #20 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 14 LDY #20 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
08 PHP A2 0D LDX #13 24 24 BIT $24 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0C LDY #12 24 24 BIT $24 88 DEY 10 FB BPL *-3 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 14 LDY #20 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 47 LDA #71 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
38 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
56 bytes
EA ... NOP × 56	No requirements

113 cycles

5 bytes
A9 56 LDA #86 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V
A2 0F LDX #15 EA NOP CA DEX 10 FC BPL *-2	Clobbers X, and Z&N
A0 10 LDY #16 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
08 PHP A2 14 LDX #20 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 14 LDY #20 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 4F LDA #79 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 4F LDA #79 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and writes in stack
48 PHA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 48 LDA #72 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
84 xx STY @zptemp A0 18 LDY #24 ;hides 'CLC' 88 ... DEY × 2 D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
48 ... PHA × 2 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A, and S; and writes in stack
11 bytes
C5 C5 CMP $C5 48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A5 A5 LDA $A5 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
48 PHA 98 TYA A0 13 LDY #19 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY 68 PLA	Clobbers Z&N; requires @ptrtemp; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 10 FA BPL *-4 68 PLA 28 PLP	Requires @rts12, and @rts15; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 18 CLC 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 38 SEC 10 FA BPL *-4 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 3 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
12 bytes
08 PHP 48 PHA 38 ... SEC × 2 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
39 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
40 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
42 bytes
26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
57 bytes
18 ... CLC × 55 90 00 BCC *+2	Clobbers C
B8 ... CLV × 55 50 00 BVC *+2	Clobbers V
EA ... NOP × 55 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 55 04 04 NOP $04	Requires support for unofficial opcodes
58 bytes
EA ... NOP × 55 4C xx xx JMP *+3	Not relocatable code

114 cycles

5 bytes
A9 57 LDA #87 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
48 PHA A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A5 A5 LDA $A5 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V
A6 A6 LDX $A6 A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 50 LDA #80 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 50 LDA #80 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP A2 18 LDX #24 ;hides 'CLC' CA ... DEX × 2 D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 18 LDY #24 ;hides 'CLC' 88 ... DEY × 2 D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
68 PLA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 49 LDA #73 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 84 xx STY @zptemp A0 14 LDY #20 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
38 bytes
36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
57 bytes
EA ... NOP × 57	No requirements

115 cycles

5 bytes
A9 58 LDA #88 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V
68 PLA A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 51 LDA #81 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 51 LDA #81 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 14 LDX #20 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 14 LDY #20 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 14 LDA #20 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 4A LDA #74 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
00 00 BRK 0 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
86 xx STX @zptemp A6 A6 LDX $A6 A2 14 LDX #20 CA DEX 10 FD BPL *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only EA NOP D0 FB BNE *-3 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
12 bytes
08 PHP 48 PHA 38 SEC A9 0E LDA #14 EA NOP E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
39 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
40 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
41 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
42 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
58 bytes
18 ... CLC × 56 90 00 BCC *+2	Clobbers C
B8 ... CLV × 56 50 00 BVC *+2	Clobbers V
EA ... NOP × 56 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 56 04 04 NOP $04	Requires support for unofficial opcodes
59 bytes
EA ... NOP × 56 4C xx xx JMP *+3	Not relocatable code

116 cycles

5 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V
A2 17 LDX #23 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 17 LDY #23 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
48 PHA A9 52 LDA #82 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 52 LDA #82 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 08 PHP A2 14 LDX #20 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 14 LDY #20 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
08 PHP A6 A6 LDX $A6 A2 14 LDX #20 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 14 LDY #20 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 15 LDX #21 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 15 LDY #21 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 4B LDA #75 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 90 FB BCC *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 90 FB BCC *-3 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
EA NOP 68 PLA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
EA ... NOP × 3 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 38 SEC 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts15; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 38 SEC 10 F9 BPL *-5 28 PLP	Clobbers A; requires @rts12, and @rts15; and writes in stack
48 PHA 18 CLC A9 74 LDA #116 ;hides 'NOP zp,X' EA NOP 69 01 ADC #1 10 FA BPL *-4 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP 18 CLC A9 74 LDA #116 ;hides 'NOP zp,X' EA NOP 69 01 ADC #1 10 FA BPL *-4 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 0C LDY #12 24 24 BIT $24 88 DEY 10 FB BPL *-3 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 14 LDY #20 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
39 bytes
EA NOP 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
58 bytes
EA ... NOP × 58	No requirements

117 cycles

5 bytes
A9 5A LDA #90 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
C5 CD CMP <$CD ;hides 'CMP $0CA2' A2 0C LDX #12 CA DEX 10 FA BPL *-4	Clobbers X, Z&N, and C
24 2C BIT <$2C ;hides 'BIT $8CA2' A2 8C LDX #140 CA DEX 30 FA BMI *-4	Clobbers X, Z&N, and V
A5 AD LDA <$AD ;hides 'LDA $F3A2' A2 F3 LDX #243 E8 INX D0 FA BNE *-4	Clobbers A, X, and Z&N
C5 CD CMP <$CD ;hides 'CMP $F3A0' A0 F3 LDY #243 C8 INY D0 FA BNE *-4	Clobbers Y, Z&N, and C
24 2C BIT <$2C ;hides 'BIT $8CA0' A0 8C LDY #140 88 DEY 30 FA BMI *-4	Clobbers Y, Z&N, and V
A5 AD LDA <$AD ;hides 'LDA $0DA0' A0 0D LDY #13 88 DEY D0 FA BNE *-4	Clobbers A, Y, and Z&N
A4 AC LDY <$AC ;hides 'LDY $0DA2' A2 0D LDX #13 CA DEX D0 FA BNE *-4	Clobbers X, Y, and Z&N
A2 16 LDX #22 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 16 LDX #22 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 16 LDY #22 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires @zptemp, and writable $00-$FF
F6 F6 INC $F6,X A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 53 LDA #83 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 53 LDA #83 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
04 0C NOP <$0C ;hides 'NOP $8CA2' A2 8C LDX #140 CA DEX 30 FA BMI *-4	Clobbers X, and Z&N; and requires support for unofficial opcodes
04 0C NOP <$0C ;hides 'NOP $0DA0' A0 0D LDY #13 88 DEY D0 FA BNE *-4	Clobbers Y, and Z&N; and requires support for unofficial opcodes
EA NOP 68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V
48 ... PHA × 2 A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 ... PHA × 2 A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
8 bytes
98 TYA A0 10 LDY #16 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 14 LDX #20 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 14 LDY #20 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 16 LDY #22 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 4C LDA #76 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
40 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
41 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
42 bytes
36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
59 bytes
18 ... CLC × 57 90 00 BCC *+2	Clobbers C
B8 ... CLV × 57 50 00 BVC *+2	Clobbers V
EA ... NOP × 57 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 57 04 04 NOP $04	Requires support for unofficial opcodes
60 bytes
EA ... NOP × 57 4C xx xx JMP *+3	Not relocatable code

118 cycles

5 bytes
A9 5B LDA #91 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V
EA NOP A2 17 LDX #23 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 17 LDY #23 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A2 16 LDX #22 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 16 LDY #22 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
A5 A5 LDA $A5 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 4D LDA #77 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 18 LDY #24 ;hides 'CLC' 88 ... DEY × 2 D0 FB BNE *-3 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
11 bytes
84 xx STY @zptemp A0 15 LDY #21 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 14 LDY #20 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
12 bytes
EA ... NOP × 3 84 xx STY @zptemp A0 14 LDY #20 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 38 SEC 10 F9 BPL *-5 68 PLA 28 PLP	Requires @rts12, and @rts14; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 00 00 BRK 0 10 F9 BPL *-5 68 PLA 28 PLP	Requires @zptemp, and dummy interrupt handler; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 00 00 BRK 0 10 F9 BPL *-5 68 PLA 28 PLP	Requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only EA NOP D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; requires support for unofficial opcodes; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 98 TYA A0 12 LDY #18 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
40 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N
59 bytes
EA ... NOP × 59	No requirements

119 cycles

5 bytes
A9 5C LDA #92 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A0 88 LDY #136 ;hides 'DEY' 08 PHP 28 PLP 30 FB BMI *-3	Clobbers Y, and Z&N; and writes in stack
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
48 PHA A2 17 LDX #23 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
7 bytes
A5 A5 LDA $A5 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V
A6 A6 LDX $A6 A2 17 LDX #23 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 17 LDY #23 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 55 LDA #85 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 55 LDA #85 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 4A LDA #$4A ;hides 'LSR A' 48 PHA 08 PHP 28 PLP D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
A9 4A LDA #$4A ;hides 'LSR A' 08 PHP C5 C5 CMP $C5 28 PLP D0 F9 BNE *-5	Clobbers A, Z&N, and C; and writes in stack
68 PLA 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 15 LDX #21 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 15 LDX #21 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 15 LDY #21 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
08 PHP F6 F6 INC $F6,X A0 14 LDY #20 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 4E LDA #78 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 08 PHP A2 14 LDX #20 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 14 LDY #20 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 08 PHP A2 14 LDX #20 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 3 08 PHP A0 14 LDY #20 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 10 LDY #16 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
41 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
42 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
43 bytes
EA NOP 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
60 bytes
18 ... CLC × 58 90 00 BCC *+2	Clobbers C
B8 ... CLV × 58 50 00 BVC *+2	Clobbers V
EA ... NOP × 58 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 58 04 04 NOP $04	Requires support for unofficial opcodes
61 bytes
EA ... NOP × 58 4C xx xx JMP *+3	Not relocatable code

120 cycles

5 bytes
A9 5D LDA #93 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 11 LDX #17 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V
7 bytes
98 TYA A0 17 LDY #23 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
48 PHA A9 56 LDA #86 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 56 LDA #86 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A2 0F LDX #15 EA NOP CA DEX 10 FC BPL *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 10 LDY #16 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
08 PHP 48 PHA A9 4F LDA #79 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
48 ... PHA × 2 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
86 xx STX @zptemp A6 A6 LDX $A6 A2 16 LDX #22 CA DEX D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
08 PHP 84 xx STY @zptemp A0 18 LDY #24 ;hides 'CLC' 88 ... DEY × 2 D0 FB BNE *-3 A4 xx LDY @zptemp 28 PLP	Requires @zptemp; and writes in stack
48 PHA 08 PHP 48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
08 PHP 48 PHA A5 A5 LDA $A5 38 SEC A9 13 LDA #19 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
40 bytes
36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N
60 bytes
EA ... NOP × 60	No requirements

121 cycles

5 bytes
A2 18 LDX #24 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 18 LDY #24 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 5E LDA #94 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 08 PHP 28 PLP 30 FA BMI *-4	Clobbers A, Z&N, C, and V; and writes in stack
E6 xx INC @zptemp A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V; and requires @zptemp
48 PHA A9 57 LDA #87 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 57 LDA #87 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP A5 A5 LDA $A5 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 90 FA BCC *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 00 00 BRK 0 90 FA BCC *-4	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; and writes in stack
48 PHA 08 PHP A2 16 LDX #22 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 16 LDY #22 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
C5 C5 CMP $C5 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A5 A5 LDA $A5 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
8C TXA C5 CD CMP <$CD ;hides 'CMP $0CA2' A2 0C LDX #12 CA DEX 10 FA BPL *-4 AA TAX	Clobbers A, Z&N, and C
98 TYA 24 2C BIT <$2C ;hides 'BIT $8CA0' A0 8C LDY #140 88 DEY 30 FA BMI *-4 A8 TAY	Clobbers A, Z&N, and V
08 PHP A6 A6 LDX $A6 A2 16 LDX #22 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 16 LDY #22 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 16 LDX #22 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 50 LDA #80 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
98 TYA 04 0C NOP <$0C ;hides 'NOP $0DA0' A0 0D LDY #13 88 DEY D0 FA BNE *-4 A8 TAY	Clobbers A, and Z&N; and requires support for unofficial opcodes
EA NOP 68 PLA 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
EA ... NOP × 3 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
48 ... PHA × 2 A9 4A LDA #$4A ;hides 'LSR A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers S, Z&N, and C; and writes in stack
85 xx STA @zptemp 68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 A5 xx LDA @zptemp	Clobbers S, Z&N, C, and V; and requires @zptemp
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 16 LDY #22 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 13 LDY #19 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
41 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
42 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
43 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
44 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
61 bytes
18 ... CLC × 59 90 00 BCC *+2	Clobbers C
B8 ... CLV × 59 50 00 BVC *+2	Clobbers V
EA ... NOP × 59 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 59 04 04 NOP $04	Requires support for unofficial opcodes
62 bytes
EA ... NOP × 59 4C xx xx JMP *+3	Not relocatable code

122 cycles

5 bytes
A9 5F LDA #95 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only EA NOP B0 FB BCS *-3	Clobbers A, Z&N, C, V, and D
EA NOP A2 11 LDX #17 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
EA NOP A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
F6 F6 INC $F6,X A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V; and requires @zptemp, and writable $00-$FF
48 PHA A9 58 LDA #88 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 58 LDA #88 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
EA NOP 68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V
8 bytes
EA NOP 98 TYA A0 17 LDY #23 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
9 bytes
48 PHA 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 16 LDX #22 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 16 LDY #22 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 17 LDY #23 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 51 LDA #81 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
41 bytes
EA NOP 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N
61 bytes
EA ... NOP × 61	No requirements

123 cycles

5 bytes
A9 60 LDA #96 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 18 LDX #24 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 18 LDY #24 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; and writes in stack
38 SEC A9 17 LDA #23 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
08 PHP A2 17 LDX #23 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 17 LDY #23 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 17 LDY #23 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 52 LDA #82 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
48 PHA 8C TXA A2 15 LDX #21 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX 68 PLA	Clobbers Z&N; requires @zptemp; and writes in stack
48 PHA 98 TYA A0 15 LDY #21 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY 68 PLA	Clobbers Z&N; requires @ptrtemp; and writes in stack
86 xx STX @zptemp C5 CD CMP <$CD ;hides 'CMP $0CA2' A2 0C LDX #12 CA DEX 10 FA BPL *-4 A6 xx LDX @zptemp	Clobbers Z&N, and C; and requires @zptemp
84 xx STY @zptemp 24 2C BIT <$2C ;hides 'BIT $8CA0' A0 8C LDY #140 88 DEY 30 FA BMI *-4 A4 xx LDY @zptemp	Clobbers Z&N, and V; and requires @zptemp
84 xx STY @zptemp A0 16 LDY #22 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 16 LDY #22 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
84 xx STY @zptemp 04 0C NOP <$0C ;hides 'NOP $0DA0' A0 0D LDY #13 88 DEY D0 FA BNE *-4 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 90 FB BCC *-3 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 3 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
12 bytes
EA ... NOP × 3 48 PHA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 3 84 xx STY @zptemp A0 16 LDY #22 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 38 SEC 10 F9 BPL *-5 68 PLA 28 PLP	Requires @rts12, and @rts15; and writes in stack
08 PHP 48 PHA 18 CLC A9 74 LDA #116 ;hides 'NOP zp,X' EA NOP 69 01 ADC #1 10 FA BPL *-4 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
13 bytes
08 PHP 48 PHA 98 TYA A0 0C LDY #12 C5 C5 CMP $C5 88 DEY 10 FB BPL *-3 A8 TAY 68 PLA 28 PLP	Writes in stack
42 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
43 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
45 bytes
EA ... NOP × 3 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
62 bytes
18 ... CLC × 60 90 00 BCC *+2	Clobbers C
B8 ... CLV × 60 50 00 BVC *+2	Clobbers V
EA ... NOP × 60 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 60 04 04 NOP $04	Requires support for unofficial opcodes
63 bytes
EA ... NOP × 60 4C xx xx JMP *+3	Not relocatable code

124 cycles

4 bytes
A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers X, and Z&N
5 bytes
A9 61 LDA #97 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A0 18 LDY #24 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A4 A4 LDY $A4 A0 18 LDY #24 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 5A LDA #90 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 5A LDA #90 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; requires dummy interrupt handler; and writes in stack
68 ... PLA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V
8 bytes
98 TYA A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
08 PHP C5 CD CMP <$CD ;hides 'CMP $0CA2' A2 0C LDX #12 CA DEX 10 FA BPL *-4 28 PLP	Clobbers X; and writes in stack
08 PHP 24 2C BIT <$2C ;hides 'BIT $8CA0' A0 8C LDY #140 88 DEY 30 FA BMI *-4 28 PLP	Clobbers Y; and writes in stack
F6 F6 INC $F6,X 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 53 LDA #83 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 3 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 ... PHA × 2 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; and writes in stack
10 bytes
48 PHA 98 TYA A0 10 LDY #16 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 10 LDY #16 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 84 xx STY @zptemp A0 17 LDY #23 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
42 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
62 bytes
EA ... NOP × 62	No requirements

125 cycles

5 bytes
A9 62 LDA #98 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 1A LDX #26 ;hides 'NOP' CA ... DEX × 2 10 FB BPL *-3	Clobbers X, and Z&N; and requires support for unofficial opcodes
A0 1A LDY #26 ;hides 'NOP' 88 ... DEY × 2 10 FB BPL *-3	Clobbers Y, and Z&N; and requires support for unofficial opcodes
68 PLA A2 18 LDX #24 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 18 LDY #24 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 18 LDX #24 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 18 LDY #24 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 5B LDA #91 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 5B LDA #91 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 17 LDX #23 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 17 LDY #23 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
11 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 17 LDX #23 CA DEX D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
43 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
44 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
46 bytes
26 26 ROL $26 \ × 2 66 26 ROR $26 / 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
63 bytes
18 ... CLC × 61 90 00 BCC *+2	Clobbers C
B8 ... CLV × 61 50 00 BVC *+2	Clobbers V
EA ... NOP × 61 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 61 04 04 NOP $04	Requires support for unofficial opcodes
64 bytes
EA ... NOP × 61 4C xx xx JMP *+3	Not relocatable code

126 cycles

5 bytes
A2 19 LDX #25 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 19 LDY #25 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 63 LDA #99 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
48 PHA A9 5C LDA #92 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 5C LDA #92 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP A0 88 LDY #136 ;hides 'DEY' 08 PHP 28 PLP 30 FB BMI *-3 28 PLP	Clobbers Y; and writes in stack
20 xx xx JSR @rts15 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; requires @rts12, and @rts15; and writes in stack
EA NOP 00 00 BRK 0 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A, and S; and writes in stack
EA NOP 68 ... PLA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V
48 PHA 08 PHP A2 17 LDX #23 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
9 bytes
C5 C5 CMP $C5 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A5 A5 LDA $A5 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; and writes in stack
EA NOP 98 TYA A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
08 PHP A6 A6 LDX $A6 A2 17 LDX #23 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP 48 PHA A9 55 LDA #85 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP C5 C5 CMP $C5 28 PLP D0 F9 BNE *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
84 xx STY @zptemp A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 14 LDY #20 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
42 bytes
36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
63 bytes
EA ... NOP × 63	No requirements

127 cycles

5 bytes
A9 64 LDA #100 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
48 PHA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
6 bytes
A2 12 LDX #18 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 5D LDA #93 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 5D LDA #93 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 00 00 BRK 0 B0 FA BCS *-4	Clobbers A, Z&N, C, and V; requires dummy interrupt handler; and writes in stack
8 bytes
EA NOP 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 11 LDX #17 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 98 TYA A0 17 LDY #23 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 17 LDY #23 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
84 xx STY @zptemp A0 18 LDY #24 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 56 LDA #86 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
43 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
44 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
45 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
46 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
64 bytes
18 ... CLC × 62 90 00 BCC *+2	Clobbers C
B8 ... CLV × 62 50 00 BVC *+2	Clobbers V
EA ... NOP × 62 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 62 04 04 NOP $04	Requires support for unofficial opcodes
65 bytes
EA ... NOP × 62 4C xx xx JMP *+3	Not relocatable code

128 cycles

5 bytes
A9 65 LDA #101 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
68 PLA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers A, X, S, and Z&N
6 bytes
8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX	Clobbers A, and Z&N
EA NOP A2 19 LDX #25 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 19 LDY #25 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
08 PHP A2 18 LDX #24 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 18 LDY #24 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 5E LDA #94 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 5E LDA #94 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
9 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 08 PHP 28 PLP 30 FA BMI *-4 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 08 PHP 28 PLP 30 FA BMI *-4 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 57 LDA #87 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 90 FA BCC *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts15; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 00 00 BRK 0 90 FA BCC *-4 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
11 bytes
08 PHP 48 PHA A5 A5 LDA $A5 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
EA NOP 84 xx STY @zptemp A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
43 bytes
EA NOP 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
64 bytes
EA ... NOP × 64	No requirements

129 cycles

5 bytes
A9 66 LDA #102 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
E6 xx INC @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers X, and Z&N; and requires @zptemp
A2 0F LDX #15 48 PHA CA DEX 10 FC BPL *-2	Clobbers X, S, and Z&N; and writes in stack
A0 10 LDY #16 48 PHA 88 DEY D0 FC BNE *-2	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 19 LDX #25 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 19 LDY #25 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 5F LDA #95 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 5F LDA #95 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V; requires dummy interrupt handler; and writes in stack
8 bytes
38 SEC A9 11 LDA #17 EA NOP E9 01 SBC #1 10 FB BPL *-3	Clobbers A, Z&N, C, and V
98 TYA A0 1A LDY #26 ;hides 'NOP' 88 ... DEY × 2 10 FB BPL *-3 A8 TAY	Clobbers A, and Z&N; and requires support for unofficial opcodes
68 PLA 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only EA NOP B0 FB BCS *-3 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only EA NOP B0 FB BCS *-3 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA NOP 08 PHP A2 11 LDX #17 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
F6 F6 INC $F6,X 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 58 LDA #88 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 3 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 17 LDY #23 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 84 xx STY @zptemp A0 18 LDY #24 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 16 LDY #22 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
44 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
45 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
46 bytes
36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
65 bytes
18 ... CLC × 63 90 00 BCC *+2	Clobbers C
B8 ... CLV × 63 50 00 BVC *+2	Clobbers V
EA ... NOP × 63 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 63 04 04 NOP $04	Requires support for unofficial opcodes
66 bytes
EA ... NOP × 63 4C xx xx JMP *+3	Not relocatable code

130 cycles

5 bytes
A9 67 LDA #103 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
48 ... PHA × 2 A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
68 PLA A2 19 LDX #25 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 19 LDY #25 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 19 LDX #25 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 19 LDY #25 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 60 LDA #96 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 60 LDA #96 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 18 LDX #24 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 18 LDY #24 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
9 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Writes in stack
44 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N
65 bytes
EA ... NOP × 65	No requirements

131 cycles

5 bytes
A2 1A LDX #26 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 1A LDY #26 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 68 LDA #104 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
08 PHP A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
7 bytes
48 PHA A9 61 LDA #97 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 61 LDA #97 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX	Clobbers A, S, and Z&N; and writes in stack
8 bytes
98 TYA A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY	Clobbers A, and Z&N
48 PHA 08 PHP A0 18 LDY #24 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
08 PHP A4 A4 LDY $A4 A0 18 LDY #24 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 5A LDA #90 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires dummy interrupt handler; and writes in stack
00 00 BRK 0 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
10 bytes
48 PHA 98 TYA A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
84 xx STY @zptemp A0 1A LDY #26 ;hides 'NOP' 88 ... DEY × 2 10 FB BPL *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
11 bytes
EA ... NOP × 2 84 xx STY @zptemp A0 18 LDY #24 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA F6 F6 INC $F6,X A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
48 ... PHA × 2 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
08 PHP 48 PHA 98 TYA A0 10 LDY #16 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
45 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
46 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
47 bytes
EA NOP 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
66 bytes
18 ... CLC × 64 90 00 BCC *+2	Clobbers C
B8 ... CLV × 64 50 00 BVC *+2	Clobbers V
EA ... NOP × 64 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 64 04 04 NOP $04	Requires support for unofficial opcodes
67 bytes
EA ... NOP × 64 4C xx xx JMP *+3	Not relocatable code

132 cycles

5 bytes
A9 69 LDA #105 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 03 xx SLO (@ptrtemp,X)	Clobbers A, X, Z&N, and C; and requires @ptrtemp, and support for unofficial opcodes
68 ... PLA × 2 A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers A, X, S, and Z&N
7 bytes
BA TSX 68 PLA 9A TXS A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers A, X, and Z&N; and unsafe for interrupts
A2 19 LDX #25 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 19 LDX #25 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 19 LDY #25 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 19 LDY #25 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 62 LDA #98 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 62 LDA #98 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 PLA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX	Clobbers A, S, and Z&N
AA TAX 68 PLA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers X, S, and Z&N
48 ... PHA × 2 A0 19 LDY #25 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
8 bytes
EA NOP 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 19 LDX #25 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 19 LDY #25 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
08 PHP A2 1A LDX #26 ;hides 'NOP' CA ... DEX × 2 10 FB BPL *-3 28 PLP	Clobbers X; requires support for unofficial opcodes; and writes in stack
08 PHP A0 1A LDY #26 ;hides 'NOP' 88 ... DEY × 2 10 FB BPL *-3 28 PLP	Clobbers Y; requires support for unofficial opcodes; and writes in stack
9 bytes
48 PHA 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 18 LDX #24 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 18 LDY #24 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 19 LDY #25 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 5B LDA #91 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Writes in stack
44 bytes
36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N
66 bytes
EA ... NOP × 66	No requirements

133 cycles

5 bytes
A9 6A LDA #106 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 1A LDX #26 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 1A LDY #26 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 19 LDA #25 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
08 PHP A2 19 LDX #25 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 19 LDY #25 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 63 LDA #99 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 63 LDA #99 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
E6 xx INC @zptemp 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 10 LDY #16 48 PHA 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 5C LDA #92 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
10 bytes
84 xx STY @zptemp A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
20 xx xx JSR @rts15 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires @rts12, and @rts15; and writes in stack
20 xx xx JSR @rts15 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires @rts12, and @rts15; and writes in stack
EA NOP 00 00 BRK 0 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires dummy interrupt handler; and writes in stack
EA NOP 00 00 BRK 0 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
11 bytes
08 PHP 48 PHA A5 A5 LDA $A5 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Writes in stack
45 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
46 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
47 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
48 bytes
EA ... NOP × 2 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
67 bytes
18 ... CLC × 65 90 00 BCC *+2	Clobbers C
B8 ... CLV × 65 50 00 BVC *+2	Clobbers V
EA ... NOP × 65 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 65 04 04 NOP $04	Requires support for unofficial opcodes
68 bytes
EA ... NOP × 65 4C xx xx JMP *+3	Not relocatable code

134 cycles

5 bytes
A9 6B LDA #107 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 13 LDX #19 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 12 LDY #18 EA NOP 88 DEY 10 FC BPL *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 64 LDA #100 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 64 LDA #100 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 08 PHP A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
8 bytes
08 PHP A2 12 LDX #18 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 81 xx STA (@ptrtemp,X) AA TAX	Clobbers A, and Z&N; and requires @ptrtemp
A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 20 xx xx JSR @rts14 B0 F9 BCS *-5	Clobbers A, Z&N, C, and V; requires @rts12, and @rts14; and writes in stack
68 PLA 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 5D LDA #93 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 00 00 BRK 0 B0 FA BCS *-4 68 PLA	Clobbers Z&N, C, and V; requires dummy interrupt handler; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 00 00 BRK 0 B0 FA BCS *-4 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 84 xx STY @zptemp A0 19 LDY #25 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 17 LDY #23 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
45 bytes
EA NOP 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N
67 bytes
EA ... NOP × 67	No requirements

135 cycles

5 bytes
A9 6C LDA #108 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 1A LDX #26 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 1A LDY #26 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 1A LDX #26 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 1A LDY #26 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 65 LDA #101 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 65 LDA #101 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 19 LDX #25 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 19 LDY #25 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
08 PHP 48 PHA A9 5E LDA #94 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
E6 xx INC @zptemp 86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 08 PHP 28 PLP 30 FA BMI *-4 68 PLA 28 PLP	Writes in stack
46 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
47 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
49 bytes
EA ... NOP × 3 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 26 26... ROL $26 × 9	Clobbers Z&N
68 bytes
18 ... CLC × 66 90 00 BCC *+2	Clobbers C
B8 ... CLV × 66 50 00 BVC *+2	Clobbers V
EA ... NOP × 66 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 66 04 04 NOP $04	Requires support for unofficial opcodes
69 bytes
EA ... NOP × 66 4C xx xx JMP *+3	Not relocatable code

136 cycles

5 bytes
A2 1B LDX #27 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 1A LDY #26 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 6D LDA #109 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
48 PHA A9 66 LDA #102 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 66 LDA #102 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 E9 LDA #$E9 ;hides 'SBC #$08' 08 PHP ;first loop only EA ... NOP × 2 30 FA BMI *-4	Clobbers A, S, Z&N, C, and V; and writes in stack
8 bytes
38 SEC A9 13 LDA #19 EA NOP E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
08 PHP E6 xx INC @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 28 PLP	Clobbers X; requires @zptemp; and writes in stack
68 ... PLA × 2 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX	Clobbers A, S, and Z&N
48 PHA 08 PHP A2 19 LDX #25 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 19 LDY #25 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
08 PHP A2 0F LDX #15 24 24 BIT $24 CA DEX 10 FB BPL *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 10 LDY #16 24 24 BIT $24 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 19 LDX #25 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 5F LDA #95 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; requires dummy interrupt handler; and writes in stack
00 00 BRK 0 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
10 bytes
48 PHA 38 SEC A9 11 LDA #17 EA NOP E9 01 SBC #1 10 FB BPL *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 11 LDA #17 EA NOP E9 01 SBC #1 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 81 xx STA (@ptrtemp,X) A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
48 PHA 98 TYA A0 1A LDY #26 ;hides 'NOP' 88 ... DEY × 2 10 FB BPL *-3 A8 TAY 68 PLA	Clobbers Z&N; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 2 86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only EA NOP B0 FB BCS *-3 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 19 LDY #25 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
46 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
68 bytes
EA ... NOP × 68	No requirements

137 cycles

5 bytes
A9 6E LDA #110 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
00 00 BRK 0 A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers X, and Z&N; requires dummy interrupt handler; and writes in stack
A2 11 LDX #17 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
A0 11 LDY #17 48 PHA 88 DEY D0 FC BNE *-2	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A2 11 LDX #17 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3	Clobbers X, Z&N, and C
A2 11 LDX #17 24 24 BIT $24 CA DEX D0 FB BNE *-3	Clobbers X, Z&N, and V
A2 11 LDX #17 A5 A5 LDA $A5 CA DEX D0 FB BNE *-3	Clobbers A, X, and Z&N
A0 11 LDY #17 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3	Clobbers Y, Z&N, and C
A0 11 LDY #17 24 24 BIT $24 88 DEY D0 FB BNE *-3	Clobbers Y, Z&N, and V
A0 11 LDY #17 A5 A5 LDA $A5 88 DEY D0 FB BNE *-3	Clobbers A, Y, and Z&N
A2 11 LDX #17 A4 A4 LDY $A4 CA DEX D0 FB BNE *-3	Clobbers X, Y, and Z&N
A2 11 LDX #17 85 xx STA @zptemp CA DEX D0 FB BNE *-3	Clobbers X, and Z&N; and requires @zptemp
A2 1A LDX #26 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 11 LDY #17 85 xx STA @zptemp 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N; and requires @zptemp
A0 1A LDY #26 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
48 PHA A9 67 LDA #103 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 67 LDA #103 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A2 11 LDX #17 04 04 NOP $04 CA DEX D0 FB BNE *-3	Clobbers X, and Z&N; and requires support for unofficial opcodes
A0 11 LDY #17 04 04 NOP $04 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N; and requires support for unofficial opcodes
8 bytes
EA NOP 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
A6 A6 LDX $A6 A2 13 LDX #19 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 12 LDY #18 EA NOP 88 DEY 10 FC BPL *-2	Clobbers Y, and Z&N
08 PHP A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
48 ... PHA × 2 08 PHP A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
9 bytes
48 PHA 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 19 LDX #25 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 19 LDY #25 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 1A LDY #26 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 60 LDA #96 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp 28 PLP	Requires @zptemp; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 17 LDA #23 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
47 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires support for unofficial opcodes
48 bytes
EA NOP 4C xx xx JMP *+3 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and not relocatable code
69 bytes
18 ... CLC × 67 90 00 BCC *+2	Clobbers C
B8 ... CLV × 67 50 00 BVC *+2	Clobbers V
EA ... NOP × 67 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 67 04 04 NOP $04	Requires support for unofficial opcodes
70 bytes
EA ... NOP × 67 4C xx xx JMP *+3	Not relocatable code

138 cycles

5 bytes
A9 6F LDA #111 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 1B LDX #27 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 1A LDY #26 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
7 bytes
38 SEC A9 1A LDA #26 E9 01 SBC #1 10 FC BPL *-2	Clobbers A, Z&N, C, and V
08 PHP A2 1A LDX #26 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 1A LDY #26 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 68 LDA #104 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 68 LDA #104 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
98 TYA A0 12 LDY #18 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
08 PHP 48 PHA A9 61 LDA #97 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 68 PLA	Clobbers S, and Z&N; and writes in stack
48 PHA 08 PHP 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 28 PLP	Clobbers A, and S; and writes in stack
10 bytes
48 PHA 98 TYA A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
11 bytes
84 xx STY @zptemp A0 19 LDY #25 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 19 LDY #25 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
00 00 BRK 0 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
86 xx STX @zptemp AA TAX 68 PLA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers S, and Z&N; and requires @zptemp
12 bytes
08 PHP 48 PHA 98 TYA A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
E6 xx INC @zptemp 84 xx STY @zptemp A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
46 bytes
36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
69 bytes
EA ... NOP × 69	No requirements

139 cycles

5 bytes
A9 70 LDA #112 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 1B LDX #27 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 1A LDY #26 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 1B LDX #27 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 1A LDY #26 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 69 LDA #105 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 69 LDA #105 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 48 PHA B0 FB BCS *-3	Clobbers A, S, Z&N, C, V, and D; and writes in stack
8 bytes
38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 85 xx STA @zptemp B0 FA BCS *-4	Clobbers A, Z&N, C, V, and D; and requires @zptemp
38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 04 04 NOP $04 B0 FA BCS *-4	Clobbers A, Z&N, C, V, and D; and requires support for unofficial opcodes
08 PHP A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 03 xx SLO (@ptrtemp,X) 28 PLP	Clobbers A, and X; requires @ptrtemp, and support for unofficial opcodes; and writes in stack
68 PLA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP BA TSX 68 PLA 9A TXS A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 28 PLP	Clobbers A, and X; writes in stack; and unsafe for interrupts
08 PHP A2 19 LDX #25 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 19 LDX #25 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 19 LDY #25 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
08 PHP F6 F6 INC $F6,X A0 19 LDY #25 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 62 LDA #98 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 08 PHP A2 19 LDX #25 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 19 LDY #25 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 08 PHP A2 19 LDX #25 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 3 08 PHP A0 19 LDY #25 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
EA NOP 84 xx STY @zptemp A0 1A LDY #26 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
47 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
48 bytes
C5 C5 CMP $C5 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
04 04 NOP $04 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
49 bytes
4C xx xx JMP *+3 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
70 bytes
18 ... CLC × 68 90 00 BCC *+2	Clobbers C
B8 ... CLV × 68 50 00 BVC *+2	Clobbers V
EA ... NOP × 68 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 68 04 04 NOP $04	Requires support for unofficial opcodes
71 bytes
EA ... NOP × 68 4C xx xx JMP *+3	Not relocatable code

140 cycles

5 bytes
A9 71 LDA #113 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 1B LDX #27 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 1A LDY #26 88 DEY 10 FD BPL *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 1B LDX #27 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 1A LDY #26 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 6A LDA #106 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 6A LDA #106 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 1A LDX #26 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 1A LDY #26 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 19 LDA #25 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 19 LDA #25 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 63 LDA #99 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
84 xx STY @zptemp A0 12 LDY #18 EA NOP 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
48 ... PHA × 2 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
48 PHA 08 PHP 86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp 28 PLP	Clobbers S; requires @zptemp; and writes in stack
12 bytes
08 PHP 84 xx STY @zptemp A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp 28 PLP	Requires @zptemp; and writes in stack
20 xx xx JSR @rts15 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires @rts12, and @rts15; and writes in stack
EA NOP 00 00 BRK 0 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 48 PHA 38 SEC A9 17 LDA #23 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
47 bytes
EA NOP 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N
70 bytes
EA ... NOP × 70	No requirements

141 cycles

5 bytes
A2 1B LDX #27 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 1B LDY #27 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 72 LDA #114 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
48 PHA A9 6B LDA #107 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 6B LDA #107 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
8 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA NOP 08 PHP 28 PLP 30 F9 BMI *-5	Clobbers A, Z&N, C, and V; and writes in stack
08 PHP A2 13 LDX #19 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 12 LDY #18 EA NOP 88 DEY 10 FC BPL *-2 28 PLP	Clobbers Y; and writes in stack
04 04 NOP $04 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
00 00 BRK 0 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX	Clobbers A, and Z&N; requires dummy interrupt handler; and writes in stack
98 TYA A0 11 LDY #17 48 PHA 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
98 TYA A0 11 LDY #17 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, Z&N, and C
98 TYA A0 11 LDY #17 24 24 BIT $24 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, Z&N, and V
98 TYA A0 11 LDY #17 85 xx STA @zptemp 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 64 LDA #100 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
98 TYA A0 11 LDY #17 04 04 NOP $04 88 DEY D0 FB BNE *-3 A8 TAY	Clobbers A, and Z&N; and requires support for unofficial opcodes
EA NOP 68 PLA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
A5 A5 LDA $A5 98 TYA A0 12 LDY #18 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY	Clobbers A, and Z&N
48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX 68 PLA	Clobbers Z&N; requires @zptemp; and writes in stack
48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 81 xx STA (@ptrtemp,X) AA TAX 68 PLA	Clobbers Z&N; requires @ptrtemp; and writes in stack
08 PHP 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX 28 PLP	Clobbers A; requires @zptemp; and writes in stack
08 PHP 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 81 xx STA (@ptrtemp,X) AA TAX 28 PLP	Clobbers A; requires @ptrtemp; and writes in stack
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 20 xx xx JSR @rts14 B0 F9 BCS *-5 68 PLA	Clobbers Z&N, C, and V; requires @rts12, and @rts14; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 20 xx xx JSR @rts14 B0 F9 BCS *-5 28 PLP	Clobbers A; requires @rts12, and @rts14; and writes in stack
48 ... PHA × 3 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 68 PLA	Clobbers S, and Z&N; and writes in stack
48 ... PHA × 2 08 PHP 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 28 PLP	Clobbers A, and S; and writes in stack
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 1A LDY #26 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 00 00 BRK 0 B0 FA BCS *-4 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 18 LDY #24 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
48 bytes
C5 C5 CMP $C5 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
24 24 BIT $24 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
EA NOP FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $200-$2FF
EA NOP FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $300-$3FF
EA NOP FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $400-$4FF
EA NOP FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $500-$5FF
EA NOP FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $600-$6FF
EA NOP FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N; and requires writable $700-$7FF
04 04 NOP $04 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
49 bytes
4C xx xx JMP *+3 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and not relocatable code
71 bytes
18 ... CLC × 69 90 00 BCC *+2	Clobbers C
B8 ... CLV × 69 50 00 BVC *+2	Clobbers V
EA ... NOP × 69 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 69 04 04 NOP $04	Requires support for unofficial opcodes
72 bytes
EA ... NOP × 69 4C xx xx JMP *+3	Not relocatable code

142 cycles

5 bytes
A9 73 LDA #115 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
A2 18 LDX #24 ;hides 'CLC' EA NOP CA ... DEX × 2 10 FA BPL *-4	Clobbers X, and Z&N
A0 18 LDY #24 ;hides 'CLC' EA NOP 88 ... DEY × 2 10 FA BPL *-4	Clobbers Y, and Z&N
48 PHA A9 6C LDA #108 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 6C LDA #108 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 PLA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; and requires support for unofficial opcodes
8 bytes
EA NOP 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
9 bytes
48 PHA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 1A LDX #26 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 1A LDY #26 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 1A LDY #26 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 65 LDA #101 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 68 PLA 28 PLP	Writes in stack
48 bytes
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 11 76 36 ROR $36,X /	Clobbers Z&N
71 bytes
EA ... NOP × 71	No requirements

143 cycles

5 bytes
A9 74 LDA #116 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
EA NOP A2 1B LDX #27 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA NOP A0 1B LDY #27 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
7 bytes
38 SEC A9 1C LDA #28 E9 01 SBC #1 D0 FC BNE *-2	Clobbers A, Z&N, C, and V
08 PHP A2 1B LDX #27 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 1A LDY #26 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 6D LDA #109 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 6D LDA #109 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
A9 4A LDA #$4A ;hides 'LSR A' 08 PHP F6 F6 INC $F6,X 28 PLP D0 F9 BNE *-5	Clobbers A, Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
48 PHA 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 66 LDA #102 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 38 SEC A9 13 LDA #19 EA NOP E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 13 LDA #19 EA NOP E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
00 00 BRK 0 86 xx STX @zptemp A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; requires @zptemp, and dummy interrupt handler; and writes in stack
84 xx STY @zptemp A0 11 LDY #17 48 PHA 88 DEY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
11 bytes
48 PHA 8C TXA A2 19 LDX #25 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX 68 PLA	Clobbers Z&N; requires @zptemp; and writes in stack
48 PHA 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY 68 PLA	Clobbers Z&N; requires @ptrtemp; and writes in stack
84 xx STY @zptemp A0 11 LDY #17 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N, and C; and requires @zptemp
84 xx STY @zptemp A0 11 LDY #17 24 24 BIT $24 88 DEY D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N, and V; and requires @zptemp
84 xx STY @zptemp A0 1A LDY #26 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 1A LDY #26 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
84 xx STY @zptemp A0 11 LDY #17 04 04 NOP $04 88 DEY D0 FB BNE *-3 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
00 00 BRK 0 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 3 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
12 bytes
08 PHP 48 PHA 38 SEC A9 11 LDA #17 EA NOP E9 01 SBC #1 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
86 xx STX @zptemp A6 A6 LDX $A6 A2 13 LDX #19 EA NOP CA DEX D0 FC BNE *-2 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
49 bytes
EA NOP C5 C5 CMP $C5 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and C
EA NOP 24 24 BIT $24 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N, and V
FE 00 02 INC $0200,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
EA NOP 04 04 NOP $04 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires support for unofficial opcodes
72 bytes
18 ... CLC × 70 90 00 BCC *+2	Clobbers C
B8 ... CLV × 70 50 00 BVC *+2	Clobbers V
EA ... NOP × 70 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 70 04 04 NOP $04	Requires support for unofficial opcodes
73 bytes
EA ... NOP × 70 4C xx xx JMP *+3	Not relocatable code

144 cycles

5 bytes
A9 75 LDA #117 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 1B LDX #27 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 1B LDY #27 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 1B LDX #27 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 1B LDY #27 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 6E LDA #110 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 6E LDA #110 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
F6 F6 INC $F6,X 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires @zptemp, support for unofficial opcodes, and writable $00-$FF
00 00 BRK 0 08 PHP A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 28 PLP	Clobbers X; requires dummy interrupt handler; and writes in stack
68 PLA 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 11 LDX #17 24 24 BIT $24 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 11 LDY #17 24 24 BIT $24 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 67 LDA #103 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 84 xx STY @zptemp A0 1A LDY #26 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
48 bytes
36 36 ROL $36,X \ × 12 76 36 ROR $36,X /	Clobbers Z&N
72 bytes
EA ... NOP × 72	No requirements

145 cycles

5 bytes
A9 76 LDA #118 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 12 LDX #18 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
A2 0F LDX #15 68 PLA CA DEX 10 FC BPL *-2	Clobbers A, X, S, and Z&N
A0 11 LDY #17 48 PHA 88 DEY 10 FC BPL *-2	Clobbers Y, S, and Z&N; and writes in stack
A0 10 LDY #16 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 1B LDX #27 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 1B LDY #27 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 6F LDA #111 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 6F LDA #111 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 1B LDX #27 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 1A LDY #26 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
9 bytes
48 PHA 38 SEC A9 1A LDA #26 E9 01 SBC #1 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 1A LDA #26 E9 01 SBC #1 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 68 LDA #104 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 12 LDY #18 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
11 bytes
86 xx STX @zptemp A6 A6 LDX $A6 A2 1B LDX #27 CA DEX D0 FD BNE *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 08 PHP 48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
08 PHP 48 PHA 98 TYA A0 11 LDY #17 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA 28 PLP	Writes in stack
49 bytes
FE 00 02 INC $0200,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $200-$2FF
FE 00 03 INC $0300,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $300-$3FF
FE 00 04 INC $0400,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $400-$4FF
FE 00 05 INC $0500,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $500-$5FF
FE 00 06 INC $0600,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $600-$6FF
FE 00 07 INC $0700,X 36 36 ROL $36,X \ × 7 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires writable $700-$7FF
73 bytes
18 ... CLC × 71 90 00 BCC *+2	Clobbers C
B8 ... CLV × 71 50 00 BVC *+2	Clobbers V
EA ... NOP × 71 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 71 04 04 NOP $04	Requires support for unofficial opcodes
74 bytes
EA ... NOP × 71 4C xx xx JMP *+3	Not relocatable code

146 cycles

5 bytes
A2 1C LDX #28 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 1D LDY #29 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 77 LDA #119 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
48 PHA A9 70 LDA #112 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 70 LDA #112 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; requires dummy interrupt handler; and writes in stack
8 bytes
04 04 NOP $04 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 38 SEC A9 1C LDA #28 E9 01 SBC #1 D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP A2 1B LDX #27 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 1A LDY #26 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
98 TYA A0 18 LDY #24 ;hides 'CLC' EA NOP 88 ... DEY × 2 10 FA BPL *-4 A8 TAY	Clobbers A, and Z&N
08 PHP A6 A6 LDX $A6 A2 1B LDX #27 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 1A LDY #26 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 69 LDA #105 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 85 xx STA @zptemp B0 FA BCS *-4 68 PLA	Clobbers Z&N, C, V, and D; requires @zptemp; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 85 xx STA @zptemp B0 FA BCS *-4 28 PLP	Clobbers A; requires @zptemp; and writes in stack
48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 04 04 NOP $04 B0 FA BCS *-4 68 PLA	Clobbers Z&N, C, V, and D; requires support for unofficial opcodes; and writes in stack
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 04 04 NOP $04 B0 FA BCS *-4 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 1A LDY #26 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
49 bytes
EA NOP 36 36 ROL $36,X \ × 12 76 36 ROR $36,X /	Clobbers Z&N
73 bytes
EA ... NOP × 73	No requirements

147 cycles

5 bytes
A9 78 LDA #120 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
A2 1C LDX #28 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 1C LDX #28 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 1C LDY #28 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 1B LDY #27 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 71 LDA #113 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 71 LDA #113 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 A2 1B LDX #27 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
EA NOP A2 0F LDX #15 68 PLA CA DEX 10 FC BPL *-2	Clobbers A, X, S, and Z&N
48 ... PHA × 2 A0 1B LDY #27 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
EA NOP A0 10 LDY #16 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
68 PLA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; and requires support for unofficial opcodes
68 PLA A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; requires dummy interrupt handler; and writes in stack
8 bytes
EA NOP 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 1B LDX #27 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 1B LDY #27 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 1B LDX #27 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 1A LDY #26 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 1B LDY #27 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 6A LDA #106 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 19 LDA #25 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
74 bytes
18 ... CLC × 72 90 00 BCC *+2	Clobbers C
B8 ... CLV × 72 50 00 BVC *+2	Clobbers V
EA ... NOP × 72 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 72 04 04 NOP $04	Requires support for unofficial opcodes
75 bytes
EA ... NOP × 72 4C xx xx JMP *+3	Not relocatable code

148 cycles

5 bytes
A9 79 LDA #121 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A2 14 LDX #20 EA NOP CA DEX 10 FC BPL *-2	Clobbers X, and Z&N
A0 14 LDY #20 EA NOP 88 DEY 10 FC BPL *-2	Clobbers Y, and Z&N
18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$9A' 9A TXS ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V
7 bytes
38 SEC A9 1D LDA #29 E9 01 SBC #1 D0 FC BNE *-2	Clobbers A, Z&N, C, and V
08 PHP A2 1B LDX #27 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 1B LDY #27 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 72 LDA #114 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 72 LDA #114 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
E6 xx INC @zptemp A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3	Clobbers A, Z&N, and C; requires @zptemp, and dummy interrupt handler; and writes in stack
48 PHA 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 6B LDA #107 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; requires support for unofficial opcodes; and writes in stack
10 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA NOP 08 PHP 28 PLP 30 F9 BMI *-5 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA NOP 08 PHP 28 PLP 30 F9 BMI *-5 28 PLP	Clobbers A; and writes in stack
00 00 BRK 0 48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 68 PLA	Clobbers Z&N; requires dummy interrupt handler; and writes in stack
11 bytes
48 PHA 98 TYA A0 11 LDY #17 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 A8 TAY 68 PLA	Clobbers Z&N, and C; and writes in stack
48 PHA 98 TYA A0 11 LDY #17 24 24 BIT $24 88 DEY D0 FB BNE *-3 A8 TAY 68 PLA	Clobbers Z&N, and V; and writes in stack
84 xx STY @zptemp A0 18 LDY #24 ;hides 'CLC' EA NOP 88 ... DEY × 2 10 FA BPL *-4 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY 68 PLA	Clobbers Z&N; requires @ptrtemp; and writes in stack
48 PHA 98 TYA A0 11 LDY #17 04 04 NOP $04 88 DEY D0 FB BNE *-3 A8 TAY 68 PLA	Clobbers Z&N; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 3 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
12 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 12 LDY #18 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX 68 PLA 28 PLP	Requires @zptemp; and writes in stack
08 PHP 48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 81 xx STA (@ptrtemp,X) AA TAX 68 PLA 28 PLP	Requires @ptrtemp; and writes in stack
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 20 xx xx JSR @rts14 B0 F9 BCS *-5 68 PLA 28 PLP	Requires @rts12, and @rts14; and writes in stack
48 ... PHA × 2 08 PHP 48 PHA 8C TXA A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1 AA TAX 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 98 TYA A0 19 LDY #25 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
74 bytes
EA ... NOP × 74	No requirements

149 cycles

5 bytes
A9 7A LDA #122 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 1C LDX #28 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 1D LDY #29 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 1C LDX #28 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 1D LDY #29 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 73 LDA #115 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 73 LDA #115 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
F6 F6 INC $F6,X 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V; and requires @zptemp, support for unofficial opcodes, and writable $00-$FF
F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3	Clobbers A, Z&N, and C; requires @zptemp, dummy interrupt handler, and writable $00-$FF; and writes in stack
68 PLA 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 18 LDX #24 ;hides 'CLC' EA NOP CA ... DEX × 2 10 FA BPL *-4 28 PLP	Clobbers X; and writes in stack
08 PHP A0 18 LDY #24 ;hides 'CLC' EA NOP 88 ... DEY × 2 10 FA BPL *-4 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 6C LDA #108 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA NOP 84 xx STY @zptemp A0 1B LDY #27 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
75 bytes
18 ... CLC × 73 90 00 BCC *+2	Clobbers C
B8 ... CLV × 73 50 00 BVC *+2	Clobbers V
EA ... NOP × 73 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 73 04 04 NOP $04	Requires support for unofficial opcodes
76 bytes
EA ... NOP × 73 4C xx xx JMP *+3	Not relocatable code

150 cycles

5 bytes
A9 7B LDA #123 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 1C LDX #28 CA DEX 10 FD BPL *-1	Clobbers A, X, S, and Z&N
68 PLA A0 1D LDY #29 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 2 A2 1C LDX #28 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 1D LDY #29 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 74 LDA #116 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 74 LDA #116 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
EA NOP 08 PHP A2 1B LDX #27 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 1B LDY #27 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
9 bytes
48 PHA 38 SEC A9 1C LDA #28 E9 01 SBC #1 D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 1C LDA #28 E9 01 SBC #1 D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 6D LDA #109 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP F6 F6 INC $F6,X 28 PLP D0 F9 BNE *-5 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
48 ... PHA × 2 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
86 xx STX @zptemp A6 A6 LDX $A6 A2 1B LDX #27 CA DEX 10 FD BPL *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
08 PHP 48 PHA 38 SEC A9 13 LDA #19 EA NOP E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
60 bytes
26 26 ROL $26 \ × 15 66 26 ROR $26 /	Clobbers Z&N
75 bytes
EA ... NOP × 75	No requirements

151 cycles

5 bytes
A2 1D LDX #29 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 1E LDY #30 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 7C LDA #124 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
A9 4A LDA #$4A ;hides 'LSR A' 20 xx xx JSR @rts14 D0 FA BNE *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
48 PHA A9 75 LDA #117 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 75 LDA #117 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$9A' 9A TXS ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
8 bytes
A9 4A LDA #$4A ;hides 'LSR A' 08 PHP \ × 2 28 PLP / D0 F9 BNE *-5	Clobbers A, Z&N, and C; and writes in stack
A5 A5 LDA $A5 18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$9A' 9A TXS ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V
48 PHA 08 PHP A2 1B LDX #27 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 1B LDY #27 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
A5 A5 LDA $A5 38 SEC A9 1D LDA #29 E9 01 SBC #1 D0 FC BNE *-2	Clobbers A, Z&N, C, and V
08 PHP A6 A6 LDX $A6 A2 1B LDX #27 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 1B LDY #27 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 1C LDX #28 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 1C LDY #28 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 6E LDA #110 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 68 PLA 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
EA ... NOP × 3 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
F6 F6 INC $F6,X 48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires @zptemp, support for unofficial opcodes, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires @zptemp, support for unofficial opcodes, and writable $00-$FF; and writes in stack
84 xx STY @zptemp A0 11 LDY #17 48 PHA 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers S, and Z&N; requires @zptemp; and writes in stack
48 ... PHA × 3 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 2 08 PHP 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; requires support for unofficial opcodes; and writes in stack
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 1B LDY #27 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
76 bytes
18 ... CLC × 74 90 00 BCC *+2	Clobbers C
B8 ... CLV × 74 50 00 BVC *+2	Clobbers V
EA ... NOP × 74 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 74 04 04 NOP $04	Requires support for unofficial opcodes
77 bytes
EA ... NOP × 74 4C xx xx JMP *+3	Not relocatable code

152 cycles

5 bytes
A9 7D LDA #125 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
7 bytes
C9 CD CMP #<$CD ;hides 'CMP $6FA2' A2 6F LDX #111 E8 INX 10 FA BPL *-4	Clobbers X, Z&N, and C
A2 2C LDX #<$2C ;hides 'BIT $11A2' A2 11 LDX #17 CA DEX D0 FA BNE *-4	Clobbers X, Z&N, and V
A9 AD LDA #<$AD ;hides 'LDA $EFA2' A2 EF LDX #239 E8 INX D0 FA BNE *-4	Clobbers A, X, and Z&N
C9 CD CMP #<$CD ;hides 'CMP $6FA0' A0 6F LDY #111 C8 INY 10 FA BPL *-4	Clobbers Y, Z&N, and C
A0 2C LDY #<$2C ;hides 'BIT $11A0' A0 11 LDY #17 88 DEY D0 FA BNE *-4	Clobbers Y, Z&N, and V
A9 AD LDA #<$AD ;hides 'LDA $6FA0' A0 6F LDY #111 C8 INY 10 FA BPL *-4	Clobbers A, Y, and Z&N
A0 AC LDY #<$AC ;hides 'LDY $90A2' A2 90 LDX #144 CA DEX 30 FA BMI *-4	Clobbers X, Y, and Z&N
A2 1D LDX #29 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 1D LDX #29 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X)	Clobbers X, and Z&N; and requires @ptrtemp
A0 1D LDY #29 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y	Clobbers Y, and Z&N; and requires @ptrtemp
F6 F6 INC $F6,X A0 1D LDY #29 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 76 LDA #118 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 76 LDA #118 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
80 0C NOP #<$0C ;hides 'NOP $11A2' A2 11 LDX #17 CA DEX D0 FA BNE *-4	Clobbers X, and Z&N; and requires support for unofficial opcodes
80 0C NOP #<$0C ;hides 'NOP $6FA0' A0 6F LDY #111 C8 INY 10 FA BPL *-4	Clobbers Y, and Z&N; and requires support for unofficial opcodes
68 PLA 18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$9A' 9A TXS ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V
48 ... PHA × 2 A2 1C LDX #28 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
48 ... PHA × 2 A0 1D LDY #29 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
8 bytes
98 TYA A0 14 LDY #20 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY	Clobbers A, and Z&N
EA ... NOP × 3 A2 1C LDX #28 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 1D LDY #29 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
9 bytes
48 PHA 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 1B LDX #27 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 1B LDY #27 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 1D LDY #29 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 6F LDA #111 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 1A LDA #26 E9 01 SBC #1 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
76 bytes
EA ... NOP × 76	No requirements

153 cycles

5 bytes
A2 EA LDX #234 ;hides 'NOP' E8 INX D0 FC BNE *-2	Clobbers X, and Z&N
A0 EA LDY #234 ;hides 'NOP' C8 INY D0 FC BNE *-2	Clobbers Y, and Z&N
A9 7E LDA #126 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$08' 08 PHP ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
7 bytes
38 SEC A9 1E LDA #30 E9 01 SBC #1 D0 FC BNE *-2	Clobbers A, Z&N, C, and V
08 PHP A2 1C LDX #28 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 1D LDY #29 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 77 LDA #119 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 77 LDA #119 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
38 SEC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 D0 FA BNE *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
48 PHA 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP 48 PHA A9 70 LDA #112 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 2 A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 28 PLP	Clobbers A, and S; requires dummy interrupt handler; and writes in stack
10 bytes
04 04 NOP $04 48 PHA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
04 04 NOP $04 08 PHP 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
C5 C5 CMP $C5 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
08 PHP A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 38 SEC A9 1C LDA #28 E9 01 SBC #1 D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP 38 SEC A9 1C LDA #28 E9 01 SBC #1 D0 FC BNE *-2 28 PLP	Clobbers A, and S; and writes in stack
11 bytes
48 PHA 98 TYA A0 18 LDY #24 ;hides 'CLC' EA NOP 88 ... DEY × 2 10 FA BPL *-4 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 18 LDY #24 ;hides 'CLC' EA NOP 88 ... DEY × 2 10 FA BPL *-4 A8 TAY 28 PLP	Clobbers A; and writes in stack
84 xx STY @zptemp A0 1C LDY #28 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 1B LDY #27 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
85 xx STA @zptemp 68 PLA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 A5 xx LDA @zptemp	Clobbers S, Z&N, C, and V; and requires @zptemp, and support for unofficial opcodes
12 bytes
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 85 xx STA @zptemp B0 FA BCS *-4 68 PLA 28 PLP	Requires @zptemp; and writes in stack
EA ... NOP × 3 84 xx STY @zptemp A0 1B LDY #27 88 DEY 10 FD BPL *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 04 04 NOP $04 B0 FA BCS *-4 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 98 TYA A0 1A LDY #26 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
77 bytes
18 ... CLC × 75 90 00 BCC *+2	Clobbers C
B8 ... CLV × 75 50 00 BVC *+2	Clobbers V
EA ... NOP × 75 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 75 04 04 NOP $04	Requires support for unofficial opcodes
78 bytes
EA ... NOP × 75 4C xx xx JMP *+3	Not relocatable code

154 cycles

5 bytes
A9 7F LDA #127 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A2 1D LDX #29 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
A2 11 LDX #17 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
48 PHA A0 1E LDY #30 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
A0 11 LDY #17 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
A6 A6 LDX $A6 A2 1D LDX #29 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 1E LDY #30 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 78 LDA #120 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 78 LDA #120 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
A9 0A LDA #$0A ;hides 'ASL A' 00 00... BRK 0 × 2 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
68 PLA 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
9 bytes
EA ... NOP × 2 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 1C LDX #28 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP A2 1C LDX #28 CA DEX D0 FD BNE *-1 81 xx STA (@ptrtemp,X) 28 PLP	Clobbers X; requires @ptrtemp; and writes in stack
08 PHP A0 1C LDY #28 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y 28 PLP	Clobbers Y; requires @ptrtemp; and writes in stack
08 PHP F6 F6 INC $F6,X A0 1B LDY #27 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 71 LDA #113 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 ... PHA × 2 08 PHP A2 1B LDX #27 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 1B LDY #27 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
EA NOP 48 PHA 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 08 PHP A2 1B LDX #27 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 3 08 PHP A0 1B LDY #27 88 DEY 10 FD BPL *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 14 LDY #20 EA NOP 88 DEY 10 FC BPL *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
11 bytes
08 PHP 48 PHA 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
77 bytes
EA ... NOP × 77	No requirements

155 cycles

5 bytes
A9 80 LDA #128 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA NOP D0 FB BNE *-3	Clobbers A, Z&N, C, and V
A2 16 LDX #22 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 16 LDY #22 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
98 TYA A0 1E LDY #30 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
48 PHA A9 79 LDA #121 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 79 LDA #121 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP A2 14 LDX #20 EA NOP CA DEX 10 FC BPL *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 14 LDY #20 EA NOP 88 DEY 10 FC BPL *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 1D LDA #29 E9 01 SBC #1 D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 1D LDA #29 E9 01 SBC #1 D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 72 LDA #114 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
E6 xx INC @zptemp 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp, and dummy interrupt handler; and writes in stack
48 ... PHA × 2 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
86 xx STX @zptemp A6 A6 LDX $A6 A2 1C LDX #28 CA DEX 10 FD BPL *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 08 PHP 48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; requires support for unofficial opcodes; and writes in stack
12 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA NOP 08 PHP 28 PLP 30 F9 BMI *-5 68 PLA 28 PLP	Writes in stack
78 bytes
18 ... CLC × 76 90 00 BCC *+2	Clobbers C
B8 ... CLV × 76 50 00 BVC *+2	Clobbers V
EA ... NOP × 76 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 76 04 04 NOP $04	Requires support for unofficial opcodes
79 bytes
EA ... NOP × 76 4C xx xx JMP *+3	Not relocatable code

156 cycles

5 bytes
A9 69 LDA #$69 ;hides 'ADC #$38' 38 SEC ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V
A2 1E LDX #30 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A0 1E LDY #30 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
7 bytes
48 PHA A9 7A LDA #122 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 7A LDA #122 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
00 00 BRK 0 A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP A2 1C LDX #28 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 1D LDY #29 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
98 TYA C9 CD CMP #<$CD ;hides 'CMP $6FA0' A0 6F LDY #111 C8 INY 10 FA BPL *-4 A8 TAY	Clobbers A, Z&N, and C
98 TYA A0 2C LDY #<$2C ;hides 'BIT $11A0' A0 11 LDY #17 88 DEY D0 FA BNE *-4 A8 TAY	Clobbers A, Z&N, and V
08 PHP A6 A6 LDX $A6 A2 1C LDX #28 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 1D LDY #29 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
8C TXA A2 1D LDX #29 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX	Clobbers A, and Z&N; and requires @zptemp
98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY	Clobbers A, and Z&N; and requires @ptrtemp
08 PHP 48 PHA A9 73 LDA #115 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
8C TXA 80 0C NOP #<$0C ;hides 'NOP $11A2' A2 11 LDX #17 CA DEX D0 FA BNE *-4 AA TAX	Clobbers A, and Z&N; and requires support for unofficial opcodes
EA NOP 68 PLA 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N
10 bytes
EA ... NOP × 3 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
F6 F6 INC $F6,X 48 PHA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; requires @zptemp, support for unofficial opcodes, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A; requires @zptemp, support for unofficial opcodes, and writable $00-$FF; and writes in stack
F6 F6 INC $F6,X 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp, dummy interrupt handler, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 28 PLP	Clobbers A; requires @zptemp, dummy interrupt handler, and writable $00-$FF; and writes in stack
48 ... PHA × 3 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 2 08 PHP 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 3 A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 08 PHP A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 28 PLP	Clobbers A, and S; requires dummy interrupt handler; and writes in stack
11 bytes
EA ... NOP × 2 48 PHA 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 84 xx STY @zptemp A0 1D LDY #29 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
12 bytes
EA NOP 08 PHP 48 PHA 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
52 bytes
36 36 ROL $36,X \ × 13 76 36 ROR $36,X /	Clobbers Z&N
78 bytes
EA ... NOP × 78	No requirements

157 cycles

5 bytes
A9 82 LDA #130 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A2 EA LDX #234 ;hides 'NOP' E8 INX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
68 PLA A0 EA LDY #234 ;hides 'NOP' C8 INY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 EA LDY #234 ;hides 'NOP' C8 INY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
EA NOP A2 16 LDX #22 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
EA NOP A0 16 LDY #22 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
48 PHA A9 7B LDA #123 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 7B LDA #123 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
9 bytes
48 PHA 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 1C LDX #28 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 1D LDY #29 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 1E LDY #30 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 74 LDA #116 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 1C LDA #28 E9 01 SBC #1 D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
79 bytes
18 ... CLC × 77 90 00 BCC *+2	Clobbers C
B8 ... CLV × 77 50 00 BVC *+2	Clobbers V
EA ... NOP × 77 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 77 04 04 NOP $04	Requires support for unofficial opcodes
80 bytes
EA ... NOP × 77 4C xx xx JMP *+3	Not relocatable code

158 cycles

5 bytes
A9 83 LDA #131 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
18 CLC A9 69 LDA #$69 ;hides 'ADC #$38' 38 SEC ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V
EA NOP A2 1E LDX #30 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
EA NOP A0 1E LDY #30 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
7 bytes
08 PHP A2 1D LDX #29 CA DEX 10 FD BPL *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 1E LDY #30 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 7C LDA #124 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 7C LDA #124 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 98 TYA A0 1E LDY #30 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, S, and Z&N; and writes in stack
9 bytes
A5 A5 LDA $A5 98 TYA A0 1E LDY #30 88 DEY D0 FD BNE *-1 A8 TAY	Clobbers A, and Z&N
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 20 xx xx JSR @rts14 D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' 20 xx xx JSR @rts14 D0 FA BNE *-4 28 PLP	Clobbers A; requires @rts12, and @rts14; and writes in stack
08 PHP 48 PHA A9 75 LDA #117 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA A9 4A LDA #$4A ;hides 'LSR A' 08 PHP \ × 2 28 PLP / D0 F9 BNE *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 4A LDA #$4A ;hides 'LSR A' 08 PHP \ × 2 28 PLP / D0 F9 BNE *-5 28 PLP	Clobbers A; and writes in stack
11 bytes
48 PHA 8C TXA A2 1C LDX #28 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X AA TAX 68 PLA	Clobbers Z&N; requires @zptemp; and writes in stack
48 PHA 98 TYA A0 1C LDY #28 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A8 TAY 68 PLA	Clobbers Z&N; requires @ptrtemp; and writes in stack
84 xx STY @zptemp C9 CD CMP #<$CD ;hides 'CMP $6FA0' A0 6F LDY #111 C8 INY 10 FA BPL *-4 A4 xx LDY @zptemp	Clobbers Z&N, and C; and requires @zptemp
84 xx STY @zptemp A0 2C LDY #<$2C ;hides 'BIT $11A0' A0 11 LDY #17 88 DEY D0 FA BNE *-4 A4 xx LDY @zptemp	Clobbers Z&N, and V; and requires @zptemp
84 xx STY @zptemp A0 1D LDY #29 88 DEY D0 FD BNE *-1 91 xx STA (@ptrtemp),Y A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and @ptrtemp
F6 F6 INC $F6,X 84 xx STY @zptemp A0 1D LDY #29 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
86 xx STX @zptemp 80 0C NOP #<$0C ;hides 'NOP $11A2' A2 11 LDX #17 CA DEX D0 FA BNE *-4 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp, and support for unofficial opcodes
48 ... PHA × 3 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
12 bytes
EA ... NOP × 3 48 PHA 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 3 84 xx STY @zptemp A0 1D LDY #29 88 DEY D0 FD BNE *-1 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA F6 F6 INC $F6,X 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires @zptemp, support for unofficial opcodes, and writable $00-$FF; and writes in stack
48 ... PHA × 2 08 PHP 48 PHA 38 SEC A9 E9 LDA #$E9 ;hides 'SBC #$3A' 3A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; requires support for unofficial opcodes; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 98 TYA A0 1A LDY #26 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
79 bytes
EA ... NOP × 79	No requirements

159 cycles

5 bytes
A9 84 LDA #132 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
48 PHA A9 69 LDA #$69 ;hides 'ADC #$38' 38 SEC ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
48 PHA A2 1E LDX #30 CA DEX 10 FD BPL *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 1E LDY #30 88 DEY 10 FD BPL *-1	Clobbers Y, S, and Z&N; and writes in stack
7 bytes
A5 A5 LDA $A5 A9 69 LDA #$69 ;hides 'ADC #$38' 38 SEC ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V
A6 A6 LDX $A6 A2 1E LDX #30 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 1E LDY #30 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
A9 4A LDA #$4A ;hides 'LSR A' 20 xx xx JSR @rts15 D0 FA BNE *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
48 PHA A9 7D LDA #125 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 7D LDA #125 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
8 bytes
98 TYA A0 16 LDY #22 EA NOP 88 DEY D0 FC BNE *-2 A8 TAY	Clobbers A, and Z&N
9 bytes
08 PHP A2 2C LDX #<$2C ;hides 'BIT $11A2' A2 11 LDX #17 CA DEX D0 FA BNE *-4 28 PLP	Clobbers X; and writes in stack
08 PHP A0 2C LDY #<$2C ;hides 'BIT $11A0' A0 11 LDY #17 88 DEY D0 FA BNE *-4 28 PLP	Clobbers Y; and writes in stack
84 xx STY @zptemp A0 EA LDY #234 ;hides 'NOP' C8 INY D0 FC BNE *-2 A4 xx LDY @zptemp	Clobbers Z&N; and requires @zptemp
08 PHP 48 PHA A9 76 LDA #118 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 98 TYA A0 14 LDY #20 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA A0 14 LDY #20 EA NOP 88 DEY 10 FC BPL *-2 A8 TAY 28 PLP	Clobbers A; and writes in stack
11 bytes
08 PHP 48 PHA 98 TYA A0 1B LDY #27 88 DEY 10 FD BPL *-1 A8 TAY 68 PLA 28 PLP	Writes in stack
80 bytes
18 ... CLC × 78 90 00 BCC *+2	Clobbers C
B8 ... CLV × 78 50 00 BVC *+2	Clobbers V
EA ... NOP × 78 85 xx STA @zptemp	Requires @zptemp
EA ... NOP × 78 04 04 NOP $04	Requires support for unofficial opcodes
81 bytes
EA ... NOP × 78 4C xx xx JMP *+3	Not relocatable code

160 cycles

5 bytes
A9 85 LDA #133 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
6 bytes
68 PLA A9 69 LDA #$69 ;hides 'ADC #$38' 38 SEC ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V
68 PLA A2 1E LDX #30 CA DEX 10 FD BPL *-1	Clobbers A, X, S, and Z&N
68 PLA A0 1E LDY #30 88 DEY 10 FD BPL *-1	Clobbers A, Y, S, and Z&N
7 bytes
98 TYA A0 1E LDY #30 88 DEY 10 FD BPL *-1 A8 TAY	Clobbers A, and Z&N
08 PHP A2 EA LDX #234 ;hides 'NOP' E8 INX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 A2 1E LDX #30 CA DEX 10 FD BPL *-1	Clobbers X, and Z&N
08 PHP A0 EA LDY #234 ;hides 'NOP' C8 INY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
EA ... NOP × 2 A0 1E LDY #30 88 DEY 10 FD BPL *-1	Clobbers Y, and Z&N
48 PHA A9 7E LDA #126 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 7E LDA #126 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
9 bytes
48 PHA 38 SEC A9 1E LDA #30 E9 01 SBC #1 D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 1E LDA #30 E9 01 SBC #1 D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 77 LDA #119 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
48 PHA 38 SEC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
48 ... PHA × 2 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers S, and Z&N; and writes in stack
11 bytes
48 PHA A5 A5 LDA $A5 98 TYA A0 1D LDY #29 88 DEY D0 FD BNE *-1 A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
86 xx STX @zptemp A6 A6 LDX $A6 A2 1D LDX #29 CA DEX 10 FD BPL *-1 A6 xx LDX @zptemp	Clobbers Z&N; and requires @zptemp
48 PHA 08 PHP 48 PHA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 48 PHA A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; requires dummy interrupt handler; and writes in stack
12 bytes
04 04 NOP $04 08 PHP 48 PHA 18 CLC A9 EB LDA #$EB ;hides 'SBC #$7A' 7A NOP ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
08 PHP 48 PHA A5 A5 LDA $A5 A9 4A LDA #$4A ;hides 'LSR A' 00 00 BRK 0 D0 FB BNE *-3 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 48 PHA 38 SEC A9 1C LDA #28 E9 01 SBC #1 D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
08 PHP 48 PHA 98 TYA A0 18 LDY #24 ;hides 'CLC' EA NOP 88 ... DEY × 2 10 FA BPL *-4 A8 TAY 68 PLA 28 PLP	Writes in stack
64 bytes
26 26 ROL $26 \ × 16 66 26 ROR $26 /	Clobbers Z&N
80 bytes
EA ... NOP × 80	No requirements

Sanity checks

It is possible to verify on compile time that no page wrap occurs, by replacing all branches with these macros:

.macro branch_check opc, dest
    opc dest
    .assert >* = >(dest), warning, "branch_check: failed, crosses page"
.endmacro
.macro bccnw dest
        branch_check bcc, dest
.endmacro
.macro bcsnw dest
        branch_check bcs, dest
.endmacro
.macro beqnw dest
        branch_check beq, dest
.endmacro
.macro bnenw dest
        branch_check bne, dest
.endmacro
.macro bminw dest
        branch_check bmi, dest
.endmacro
.macro bplnw dest
        branch_check bpl, dest
.endmacro
.macro bvcnw dest
        branch_check bvc, dest
.endmacro
.macro bvsnw dest
        branch_check bvs, dest
.endmacro

See also

• Delay code for functions that produce runtime-determined amount of delay
• Bisqwit's 6502 delay_n macro set for ca65: http://bisqwit.iki.fi/src/6502-inline_delay.7z