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 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 Jcc dest
        branch_check bcc, dest
.endmacro
.macro Jcs dest
        branch_check bcs, dest
.endmacro
.macro Jeq dest
        branch_check beq, dest
.endmacro
.macro Jne dest
        branch_check bne, dest
.endmacro
.macro Jmi dest
        branch_check bmi, dest
.endmacro
.macro Jpl dest
        branch_check bpl, dest
.endmacro
.macro Jvc dest
        branch_check bvc, dest
.endmacro
.macro Jvs dest
        branch_check bvs, dest
.endmacro

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.
• @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.

{{#css:

 .testtable td{padding:2px} .testtable td pre{padding:2px;margin:2px}

}}

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, but as the memory address modified depends on the value of X, and in this document it is a bit difficult to formalize the rules under which you can write to such addresses, thus the instruction is not used.
• ix and iy instructions such as LDA ($00,X) or LDA ($00),Y do 6 cycles, but there may be side effects for reading from random memory addresses (such as $2002), and therefore we do not do that. With ind-y there is also the trouble of predicting whether a wrap occurs or not.
• Absolute RMW instructions like INC $2000 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
A6 A6 LDX $A6 EA ... NOP × 2	Clobbers X, and Z&N
A4 A4 LDY $A4 EA ... NOP × 2	Clobbers Y, and Z&N
85 xx STA @zptemp EA ... NOP × 2	Requires @zptemp
04 04 NOP $04 EA ... NOP × 2	Requires support for unofficial opcodes
5 bytes
4C xx xx JMP *+3 EA ... NOP × 2	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.
• abs-indexed RMW instructions such as INC abs,X do 7 cycles, but it is difficult to formalize the rules under which one could write to such random addresses.

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
4 bytes
EA ... NOP × 4	No requirements

• ix and iy RMW instructions such as SLO ($00,X) or SLO ($00),Y would do 8 cycles for 2 bytes of code, but it is dangerous to read random memory addresses, let alone write to them, so we do not do that. These instructions are also unofficial.

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
85 xx STA @zptemp EA ... NOP × 3	Requires @zptemp
04 04 NOP $04 EA ... NOP × 3	Requires support for unofficial opcodes
6 bytes
4C xx xx JMP *+3 EA ... NOP × 3	Not relocatable code

• Jumping into the middle of another instruction 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
26 26 ROL $26 66 26 ROR $26	Clobbers Z&N
08 PHP 24 24 BIT $24 28 PLP	Writes in stack
5 bytes
EA ... NOP × 5	No requirements

• Note that 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
E6 xx INC @zptemp F6 F6 INC $F6,X	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
5 bytes
A2 02 LDX #2 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 02 LDY #2 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
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
85 xx STA @zptemp EA ... NOP × 4	Requires @zptemp
04 04 NOP $04 EA ... NOP × 4	Requires support for unofficial opcodes
7 bytes
4C xx xx JMP *+3 EA ... NOP × 4	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 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
A6 A6 LDX $A6 26 26 ROL $26 66 26 ROR $26	Clobbers X, and Z&N
A4 A4 LDY $A4 26 26 ROL $26 66 26 ROR $26	Clobbers Y, and Z&N
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
85 xx STA @zptemp EA ... NOP × 5	Requires @zptemp
04 04 NOP $04 EA ... NOP × 5	Requires support for unofficial opcodes
8 bytes
4C xx xx JMP *+3 EA ... NOP × 5	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
6 bytes
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
08 PHP 28 PLP EA ... NOP × 4	Writes in stack
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
85 xx STA @zptemp EA ... NOP × 6	Requires @zptemp
04 04 NOP $04 EA ... NOP × 6	Requires support for unofficial opcodes
9 bytes
4C xx xx JMP *+3 EA ... NOP × 6	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 03 LDY #3 88 DEY D0 FD BNE *-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
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
85 xx STA @zptemp EA ... NOP × 7	Requires @zptemp
04 04 NOP $04 EA ... NOP × 7	Requires support for unofficial opcodes
10 bytes
4C xx xx JMP *+3 EA ... NOP × 7	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 LDA #0 20 xx xx JSR delay_256a_16_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks, and delay_256a_16_clocks
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 03 LDY #3 88 DEY D0 FD BNE *-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
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 03 LDY #3 88 DEY D0 FD BNE *-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
85 xx STA @zptemp EA ... NOP × 8	Requires @zptemp
04 04 NOP $04 EA ... NOP × 8	Requires support for unofficial opcodes
11 bytes
4C xx xx JMP *+3 EA ... NOP × 8	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 28 PLP 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 \ × 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
7 bytes
EA ... NOP × 3 08 PHP \ × 2 28 PLP /	Writes in stack
EA ... NOP × 3 68 PLA \ × 2 48 PHA /	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 03 LDY #3 88 DEY D0 FD BNE *-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
85 xx STA @zptemp EA ... NOP × 9	Requires @zptemp
04 04 NOP $04 EA ... NOP × 9	Requires support for unofficial opcodes
12 bytes
4C xx xx JMP *+3 EA ... NOP × 9	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' 18 CLC 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 03 LDY #3 EA NOP 88 DEY D0 FC BNE *-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 28 PLP 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 \ × 2 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
08 PHP 24 24 BIT $24 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
26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N
08 PHP 24 24 BIT $24 36 36 ROL $36,X 76 36 ROR $36,X 28 PLP	Writes in stack
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 24 24 BIT $24 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
85 xx STA @zptemp EA ... NOP × 10	Requires @zptemp
04 04 NOP $04 EA ... NOP × 10	Requires support for unofficial opcodes
13 bytes
4C xx xx JMP *+3 EA ... NOP × 10	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
36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N
08 PHP 28 PLP 08 PHP 26 26 ROL $26 66 26 ROR $26 28 PLP	Writes in stack
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
A0 03 LDY #3 48 PHA 88 DEY D0 FC BNE *-2	Clobbers Y, 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
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
EA ... NOP × 2 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1	Clobbers A, Z&N, and C
A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only 08 PHP 28 PLP 10 FA BPL *-4	Clobbers A, and Z&N; and writes in stack
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 24 24 BIT $24 28 PLP 20 xx xx JSR @rts15	Requires @rts12, and @rts15; and writes in stack
48 PHA A9 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 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 24 24 BIT $24 28 PLP 00 00 BRK 0	Requires dummy interrupt handler; and writes in stack
EA NOP 68 PLA 48 PHA 68 ... PLA × 4	Clobbers A, S, and Z&N
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
EA ... NOP × 2 68 PLA \ × 3 48 PHA /	Clobbers A, and Z&N
9 bytes
EA NOP E6 xx INC @zptemp F6 F6... INC $F6,X× 3	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
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
85 xx STA @zptemp EA ... NOP × 11	Requires @zptemp
04 04 NOP $04 EA ... NOP × 11	Requires support for unofficial opcodes
14 bytes
4C xx xx JMP *+3 EA ... NOP × 11	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 05 LDY #5 88 DEY D0 FD BNE *-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 28 PLP 08 PHP 36 36 ROL $36,X 76 36 ROR $36,X 28 PLP	Writes in stack
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 2 48 PHA /	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 LDA #0 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
A2 04 LDX #4 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
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
A2 82 LDX #130 ;hides 'NOP #imm' 04 EA NOP $EA ;hides 'NOP' CA DEX 30 FA BMI *-4	Clobbers X, and Z&N; and requires support for unofficial opcodes
A0 82 LDY #130 ;hides 'NOP #imm' 04 EA NOP $EA ;hides 'NOP' 88 DEY 30 FA BMI *-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 × 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
F6 F6 INC $F6,X 68 PLA \ × 3 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
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
EA ... NOP × 3 68 PLA \ × 3 48 PHA /	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 12	Requires @zptemp
04 04 NOP $04 EA ... NOP × 12	Requires support for unofficial opcodes
15 bytes
4C xx xx JMP *+3 EA ... NOP × 12	Not relocatable code

28 cycles

5 bytes
A9 LDA #1 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
EA ... NOP × 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 05 LDY #5 88 DEY D0 FD BNE *-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 LDA #2 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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' 18 CLC 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' 18 CLC 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 03 LDY #3 EA NOP 88 DEY D0 FC BNE *-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
EA NOP 68 PLA 48 PHA 68 ... PLA × 5	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 08 PHP F6 F6 INC $F6,X 28 PLP \ × 2 08 PHP / 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
EA NOP F6 F6 INC $F6,X 68 PLA \ × 3 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
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 28 PLP 08 PHP 36 36 ROL $36,X 76 36 ROR $36,X 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
68 PLA 48 PHA 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X 76 36 ROR $36,X	Clobbers A, and Z&N
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
85 xx STA @zptemp EA ... NOP × 13	Requires @zptemp
04 04 NOP $04 EA ... NOP × 13	Requires support for unofficial opcodes
16 bytes
4C xx xx JMP *+3 EA ... NOP × 13	Not relocatable code

30 cycles

5 bytes
A9 LDA #3 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 05 LDY #5 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
EA ... NOP × 3 A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1	Clobbers A, Z&N, and C
EA ... NOP × 2 A2 05 LDX #5 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 05 LDY #5 88 DEY D0 FD BNE *-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
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
EA NOP 68 ... PLA × 7	Clobbers A, S, and Z&N
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 2A LDA #$2A ;hides 'ROL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
EA NOP 68 PLA \ × 4 48 PHA /	Clobbers A, and Z&N
10 bytes
F6 F6... INC $F6,X× 5	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
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 06 LDY #6 88 DEY D0 FD BNE *-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
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
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
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
85 xx STA @zptemp EA ... NOP × 14	Requires @zptemp
04 04 NOP $04 EA ... NOP × 14	Requires support for unofficial opcodes
17 bytes
4C xx xx JMP *+3 EA ... NOP × 14	Not relocatable code

32 cycles

5 bytes
A9 LDA #5 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 × 2 18 CLC 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
F6 F6 INC $F6,X A0 05 LDY #5 88 DEY D0 FD BNE *-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
A2 FA LDX #250 ;hides 'NOP' EA NOP E8 ... INX × 2 D0 FA BNE *-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
48 ... PHA × 2 A0 05 LDY #5 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
68 PLA 20 xx xx JSR @rts14× 2	Clobbers A, S, and Z&N; requires @rts12, and @rts14; and writes in stack
8 bytes
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
68 ... PLA × 8	Clobbers A, S, and Z&N
9 bytes
48 PHA A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only 08 PHP 28 PLP 10 FA BPL *-4 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 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 03 LDX #3 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 03 LDY #3 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
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 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 2A LDA #$2A ;hides 'ROL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
EA ... NOP × 2 68 PLA \ × 4 48 PHA /	Clobbers A, and Z&N
11 bytes
EA NOP F6 F6... INC $F6,X× 5	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
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 LDA #6 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 06 LDY #6 88 DEY D0 FD BNE *-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 05 LDY #5 88 DEY D0 FD BNE *-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
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
EA NOP 68 PLA 48 PHA 68 ... PLA × 6	Clobbers A, S, and Z&N
10 bytes
08 PHP \ × 2 28 PLP / 08 PHP 36 36 ROL $36,X 76 36 ROR $36,X 28 PLP	Writes in stack
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 3 48 PHA /	Clobbers A, and Z&N
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
85 xx STA @zptemp EA ... NOP × 15	Requires @zptemp
04 04 NOP $04 EA ... NOP × 15	Requires support for unofficial opcodes
18 bytes
4C xx xx JMP *+3 EA ... NOP × 15	Not relocatable code

34 cycles

5 bytes
A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 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 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 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
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 68 ... PLA × 8	Clobbers A, S, and Z&N
10 bytes
F6 F6 INC $F6,X 68 PLA \ × 4 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
11 bytes
EA ... NOP × 3 68 PLA \ × 4 48 PHA /	Clobbers A, and Z&N
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 LDA #8 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
A0 88 LDY #136 ;hides 'DEY' 88 ... DEY × 2 30 FB BMI *-3	Clobbers Y, and Z&N
A2 F8 LDX #248 ;hides 'SED' E8 ... INX × 2 D0 FB BNE *-3	Clobbers X, Z&N, and D
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
EA ... NOP × 2 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1	Clobbers A, Z&N, and C
EA ... NOP × 2 A2 06 LDX #6 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
48 PHA A9 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 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
68 PLA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A, S, and Z&N; and writes in stack
8 bytes
EA ... NOP × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
EA ... NOP × 2 08 PHP 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 05 LDY #5 88 DEY D0 FD BNE *-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
68 PLA 48 PHA 68 ... PLA × 7	Clobbers A, S, and Z&N
10 bytes
68 PLA \ × 5 48 PHA /	Clobbers A, and Z&N
12 bytes
E6 xx INC @zptemp F6 F6... INC $F6,X× 5	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
13 bytes
E6 xx INC @zptemp EA ... NOP × 3 36 36 ROL $36,X \ × 2 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 \ × 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
85 xx STA @zptemp EA ... NOP × 16	Requires @zptemp
04 04 NOP $04 EA ... NOP × 16	Requires support for unofficial opcodes
19 bytes
4C xx xx JMP *+3 EA ... NOP × 16	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 07 LDX #7 CA DEX D0 FD BNE *-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 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 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 24 24 BIT $24 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
20 xx xx JSR @rts12× 3	Requires @rts12; and writes in stack
68 ... PLA × 9	Clobbers A, S, and Z&N
10 bytes
08 PHP 48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 18 CLC 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
11 bytes
EA NOP F6 F6 INC $F6,X 68 PLA \ × 4 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
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 LDA #10 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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' 18 CLC 10 FC BPL *-2	Clobbers A, S, Z&N, and C; and writes in stack
48 PHA A0 88 LDY #136 ;hides 'DEY' 88 DEY 30 FC BMI *-2	Clobbers Y, S, and Z&N; and writes in stack
A2 04 LDX #4 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
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' 18 CLC 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 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 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
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
EA ... NOP × 3 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
EA ... NOP × 3 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 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 05 LDY #5 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
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
EA NOP 68 PLA 48 PHA 68 ... PLA × 7	Clobbers A, S, and Z&N
11 bytes
EA NOP 68 PLA \ × 5 48 PHA /	Clobbers A, and Z&N
13 bytes
EA NOP E6 xx INC @zptemp F6 F6... INC $F6,X× 5	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
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
E6 xx INC @zptemp 36 36 ROL $36,X 76 36 ROR $36,X 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 \ × 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
85 xx STA @zptemp EA ... NOP × 17	Requires @zptemp
04 04 NOP $04 EA ... NOP × 17	Requires support for unofficial opcodes
20 bytes
4C xx xx JMP *+3 EA ... NOP × 17	Not relocatable code

38 cycles

5 bytes
A9 LDA #11 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 07 LDX #7 CA DEX D0 FD BNE *-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' 18 CLC 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
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2	Clobbers A, Z&N, and C
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 90 FD BCC *-1 28 PLP	Clobbers A; and writes in stack
08 PHP A2 06 LDX #6 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 06 LDY #6 88 DEY D0 FD BNE *-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
EA NOP 68 ... PLA × 9	Clobbers A, S, and Z&N
12 bytes
68 PLA \ × 2 48 PHA / 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers A, and Z&N
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 0A LDA #$0A ;hides 'ASL 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 07 LDX #7 CA DEX D0 FD BNE *-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 07 LDX #7 CA DEX D0 FD BNE *-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 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 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
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
A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only 20 xx xx JSR @rts14 10 F9 BPL *-5	Clobbers A, and Z&N; requires @rts12, and @rts14; and writes in stack
68 ... PLA × 2 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 28 PLP	Clobbers A, S, and Z&N; and writes in stack
9 bytes
48 PHA A9 2A LDA #$2A ;hides 'ROL A' EA ... NOP × 2 18 CLC 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 × 2 18 CLC 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 F6 F6 INC $F6,X A0 05 LDY #5 88 DEY D0 FD BNE *-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 A2 FA LDX #250 ;hides 'NOP' EA NOP E8 ... INX × 2 D0 FA BNE *-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 05 LDY #5 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
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 × 2 08 PHP 28 PLP 20 xx xx JSR @rts14× 2	Requires @rts12, and @rts14; and writes in stack
68 PLA 48 PHA 68 ... PLA × 8	Clobbers A, S, and Z&N
48 PHA 20 xx xx JSR @rts12× 3	Clobbers S; requires @rts12; and writes in stack
11 bytes
EA ... NOP × 2 08 PHP 48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 90 FD BCC *-1 68 PLA 28 PLP	Writes in stack
12 bytes
EA ... NOP × 2 68 PLA \ × 5 48 PHA /	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 2 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 18	Requires @zptemp
04 04 NOP $04 EA ... NOP × 18	Requires support for unofficial opcodes
21 bytes
4C xx xx JMP *+3 EA ... NOP × 18	Not relocatable code

40 cycles

5 bytes
A9 LDA #13 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
EA NOP 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 × 2 A2 07 LDX #7 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
48 PHA A9 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 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
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2	Clobbers A, S, Z&N, and C
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
EA ... NOP × 3 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2	Clobbers A, Z&N, and C
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 06 LDY #6 88 DEY D0 FD BNE *-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
10 bytes
68 ... PLA × 10	Clobbers A, S, and Z&N
12 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 4 48 PHA /	Clobbers A, and Z&N
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
18 CLC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
A2 08 LDX #8 CA DEX D0 FD BNE *-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' 18 CLC 10 FC BPL *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 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
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 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 C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
11 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 8	Clobbers A, S, and Z&N
12 bytes
F6 F6 INC $F6,X 68 PLA \ × 5 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
13 bytes
EA ... NOP × 3 68 PLA \ × 5 48 PHA /	Clobbers A, and Z&N
14 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	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
85 xx STA @zptemp EA ... NOP × 19	Requires @zptemp
04 04 NOP $04 EA ... NOP × 19	Requires support for unofficial opcodes
22 bytes
4C xx xx JMP *+3 EA ... NOP × 19	Not relocatable code

42 cycles

5 bytes
A9 LDA #15 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-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' 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
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 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 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 07 LDX #7 CA DEX D0 FD BNE *-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 × 3 A2 07 LDX #7 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 07 LDY #7 88 DEY D0 FD BNE *-1	Clobbers Y, 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
08 PHP A0 88 LDY #136 ;hides 'DEY' 88 ... DEY × 2 30 FB BMI *-3 28 PLP	Clobbers Y; and writes in stack
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
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 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
EA ... NOP × 2 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
11 bytes
EA NOP 68 ... PLA × 10	Clobbers A, S, and Z&N
12 bytes
68 PLA \ × 6 48 PHA /	Clobbers A, and Z&N
14 bytes
F6 F6... INC $F6,X× 7	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
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 LDA #16 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
68 PLA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
6 bytes
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
A2 06 LDX #6 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 06 LDY #6 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 E9 LDA #$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 07 LDX #7 CA DEX D0 FD BNE *-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
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 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
68 PLA 48 PHA 68 ... PLA × 9	Clobbers A, S, and Z&N
13 bytes
A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 8 10 F4 BPL *-10	Clobbers A, and Z&N
15 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 20	Requires @zptemp
04 04 NOP $04 EA ... NOP × 20	Requires support for unofficial opcodes
23 bytes
4C xx xx JMP *+3 EA ... NOP × 20	Not relocatable code

44 cycles

5 bytes
A9 LDA #17 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 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 08 LDX #8 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
7 bytes
A6 A6 LDX $A6 A2 08 LDX #8 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
48 PHA A9 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 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' 18 CLC 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' 18 CLC 10 FC BPL *-2 28 PLP	Clobbers A, and S; and writes in stack
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' 18 CLC 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' 18 CLC 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
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 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
08 PHP F6 F6 INC $F6,X 48 PHA 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
EA ... NOP × 3 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 68 PLA 28 PLP	Writes in stack
68 ... PLA × 11	Clobbers A, S, and Z&N
13 bytes
EA NOP 68 PLA \ × 6 48 PHA /	Clobbers A, and Z&N
15 bytes
EA NOP F6 F6... INC $F6,X× 7	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
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 LDA #18 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
68 PLA A2 08 LDX #8 CA DEX D0 FD BNE *-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
EA ... NOP × 3 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
EA ... NOP × 2 A2 08 LDX #8 CA DEX D0 FD BNE *-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 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 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 07 LDX #7 CA DEX D0 FD BNE *-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
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
12 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 9	Clobbers A, S, and Z&N
14 bytes
36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 68 PLA \ × 3 48 PHA /	Clobbers A, and Z&N
16 bytes
EA ... NOP × 2 E6 xx INC @zptemp 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 21	Requires @zptemp
04 04 NOP $04 EA ... NOP × 21	Requires support for unofficial opcodes
24 bytes
4C xx xx JMP *+3 EA ... NOP × 21	Not relocatable code

46 cycles

5 bytes
A2 09 LDX #9 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 09 LDY #9 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 LDA #19 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
08 PHP A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
8 bytes
08 PHP 28 PLP 00 00... BRK 0 × 3	Requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP A2 07 LDX #7 CA DEX D0 FD BNE *-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 07 LDX #7 CA DEX D0 FD BNE *-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
08 PHP 48 PHA A9 LDA #5 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 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only 20 xx xx JSR @rts14 10 F9 BPL *-5 68 PLA	Clobbers Z&N; requires @rts12, and @rts14; and writes in stack
EA NOP 20 xx xx JSR @rts14 20 xx xx JSR @rts15× 2	Requires @rts12, @rts14, and @rts15; and writes in stack
11 bytes
08 PHP 48 PHA A9 2A LDA #$2A ;hides 'ROL A' EA ... NOP × 2 18 CLC 10 FA BPL *-4 68 PLA 28 PLP	Writes in stack
12 bytes
EA NOP 68 ... PLA × 11	Clobbers A, S, and Z&N
14 bytes
EA ... NOP × 2 68 PLA \ × 6 48 PHA /	Clobbers A, and Z&N
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 LDA #20 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
7 bytes
BA TSX 68 PLA 9A TXS A9 0A LDA #$0A ;hides 'ASL 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
EA NOP F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL 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 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 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' 18 CLC 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 08 LDX #8 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 ... PHA × 2 A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
EA NOP 68 PLA A2 08 LDX #8 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
EA NOP 68 PLA A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
8 bytes
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 10 FB BPL *-3	Clobbers A, Z&N, and C
EA ... NOP × 3 A2 08 LDX #8 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 08 LDY #8 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
08 PHP A2 05 LDX #5 ;hides 'ORA zp' EA NOP CA DEX D0 FB BNE *-3 28 PLP	Clobbers A, and X; and writes in stack
08 PHP A0 05 LDY #5 ;hides 'ORA zp' EA NOP 88 DEY D0 FB BNE *-3 28 PLP	Clobbers A, and Y; and writes in stack
68 PLA 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A, S, and Z&N; and writes in stack
9 bytes
EA NOP 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
EA NOP 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 × 2 08 PHP A2 07 LDX #7 CA DEX D0 FD BNE *-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
F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 LDA #6 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 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
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
48 ... PHA × 3 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2 68 PLA	Clobbers S, Z&N, and C; 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
12 bytes
68 PLA 48 PHA 68 ... PLA × 10	Clobbers A, S, and Z&N
14 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 5 48 PHA /	Clobbers A, and Z&N
16 bytes
E6 xx INC @zptemp F6 F6... INC $F6,X× 7	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
17 bytes
EA ... NOP × 3 E6 xx INC @zptemp 36 36 ROL $36,X \ × 3 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 \ × 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
85 xx STA @zptemp EA ... NOP × 22	Requires @zptemp
04 04 NOP $04 EA ... NOP × 22	Requires support for unofficial opcodes
25 bytes
4C xx xx JMP *+3 EA ... NOP × 22	Not relocatable code

48 cycles

5 bytes
A9 LDA #21 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
EA NOP A2 09 LDX #9 CA DEX D0 FD BNE *-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 18 CLC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
08 PHP A2 08 LDX #8 CA DEX D0 FD BNE *-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
9 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
12 bytes
68 ... PLA × 12	Clobbers A, S, and Z&N
14 bytes
F6 F6 INC $F6,X 68 PLA \ × 6 48 PHA /	Clobbers A, and Z&N; and requires @zptemp, and writable $00-$FF
15 bytes
EA ... NOP × 3 68 PLA \ × 6 48 PHA /	Clobbers A, and Z&N
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 LDA #22 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 0A LDA #$0A ;hides 'ASL A' 24 24 BIT $24 90 FB BCC *-3	Clobbers A, Z&N, C, and V
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
A6 A6 LDX $A6 A2 09 LDX #9 CA DEX D0 FD BNE *-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 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 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 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers S, Z&N, and C; and writes in stack
EA NOP 68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A, and S; and writes in stack
8 bytes
C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
26 26 ROL $26 66 26 ROR $26 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
08 PHP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
9 bytes
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 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 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 07 LDX #7 CA DEX D0 FD BNE *-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
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
13 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 10	Clobbers A, S, and Z&N
14 bytes
68 PLA \ × 7 48 PHA /	Clobbers A, and Z&N
17 bytes
EA NOP E6 xx INC @zptemp F6 F6... INC $F6,X× 7	Clobbers Z&N; and requires @zptemp, and writable $00-$FF
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
E6 xx INC @zptemp 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 @zptemp
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
85 xx STA @zptemp EA ... NOP × 23	Requires @zptemp
04 04 NOP $04 EA ... NOP × 23	Requires support for unofficial opcodes
26 bytes
4C xx xx JMP *+3 EA ... NOP × 23	Not relocatable code

50 cycles

5 bytes
A9 LDA #23 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 07 LDX #7 EA NOP CA DEX D0 FC BNE *-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
A9 2A LDA #$2A ;hides 'ROL 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 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 LDA #16 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 ... PLA × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, S, Z&N, and C
68 PLA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A, S, and Z&N; and writes in stack
8 bytes
EA ... NOP × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
EA ... NOP × 2 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
EA ... NOP × 2 08 PHP A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
08 PHP A2 06 LDX #6 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 06 LDY #6 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only B0 FC BCS *-2 68 PLA 28 PLP	Writes in stack
13 bytes
EA NOP 68 ... PLA × 12	Clobbers A, S, and Z&N
15 bytes
68 PLA 48 PHA A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 8 10 F4 BPL *-10	Clobbers A, and Z&N
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 0A LDX #10 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 0A LDY #10 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
20 xx xx JSR @rts12 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C; requires @rts12; and writes in stack
48 PHA A9 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 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 0A LDA #$0A ;hides 'ASL 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 18 CLC 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
36 36 ROL $36,X 76 36 ROR $36,X A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
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 08 LDX #8 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
9 bytes
08 PHP A6 A6 LDX $A6 A2 08 LDX #8 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP 48 PHA A9 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
10 bytes
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' 18 CLC 10 FC BPL *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
11 bytes
08 PHP C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
13 bytes
68 PLA 48 PHA 68 ... PLA × 11	Clobbers A, S, and Z&N
15 bytes
EA NOP 68 PLA \ × 7 48 PHA /	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 3 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 24	Requires @zptemp
04 04 NOP $04 EA ... NOP × 24	Requires support for unofficial opcodes
27 bytes
4C xx xx JMP *+3 EA ... NOP × 24	Not relocatable code

52 cycles

5 bytes
A9 LDA #25 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 0A LDA #$0A ;hides 'ASL 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 07 LDX #7 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
48 PHA A9 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 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
F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
F6 F6 INC $F6,X 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
08 PHP F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts12 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12; and writes in stack
00 00... BRK 0 × 4	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 3 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers S, Z&N, and C; and writes in stack
68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 10 FB BPL *-3	Clobbers A, S, Z&N, and C
48 ... PHA × 2 08 PHP A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A, and S; and writes in stack
9 bytes
EA ... NOP × 3 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; and writes in stack
18 CLC A9 4A LDA #$4A ;hides 'LSR A' 36 36 ROL $36,X 76 36 ROR $36,X 90 F9 BCC *-5	Clobbers A, Z&N, and C
EA ... NOP × 3 08 PHP A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 2 08 PHP A2 08 LDX #8 CA DEX D0 FD BNE *-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
08 PHP 48 PHA A9 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
13 bytes
68 ... PLA × 13	Clobbers A, S, and Z&N
16 bytes
36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 68 PLA \ × 4 48 PHA /	Clobbers A, and Z&N
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 LDA #26 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
68 PLA A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers A, Y, S, and Z&N
6 bytes
18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2	Clobbers A, Z&N, C, and V
EA NOP A2 0A LDX #10 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 0A LDY #10 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 2A LDA #$2A ;hides 'ROL A' 00 00 BRK 0 10 FB BPL *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
7 bytes
08 PHP A2 09 LDX #9 CA DEX D0 FD BNE *-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
20 xx xx JSR @rts14 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
48 PHA A9 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 LDA #19 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 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
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
68 PLA \ × 2 48 PHA / A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C
14 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 11	Clobbers A, S, and Z&N
16 bytes
EA ... NOP × 2 68 PLA \ × 7 48 PHA /	Clobbers A, and Z&N
18 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	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
85 xx STA @zptemp EA ... NOP × 25	Requires @zptemp
04 04 NOP $04 EA ... NOP × 25	Requires support for unofficial opcodes
28 bytes
4C xx xx JMP *+3 EA ... NOP × 25	Not relocatable code

54 cycles

5 bytes
A9 LDA #27 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 0A LDX #10 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 0A LDY #10 88 DEY D0 FD BNE *-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 × 2 18 CLC 10 FA BPL *-4	Clobbers A, Z&N, and C
A6 A6 LDX $A6 A2 0A LDX #10 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 0A LDY #10 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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 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
68 ... PLA × 2 08 PHP A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A, S, and Z&N; and writes in stack
9 bytes
08 PHP BA TSX 68 PLA 9A TXS A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 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
EA NOP F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL 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 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A, and S; and writes in stack
48 ... PHA × 2 08 PHP A2 08 LDX #8 CA DEX D0 FD BNE *-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
C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 08 PHP A2 08 LDX #8 CA DEX D0 FD BNE *-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
11 bytes
EA NOP 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
14 bytes
EA NOP 68 ... PLA × 13	Clobbers A, S, and Z&N
16 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 6 48 PHA /	Clobbers A, and Z&N
18 bytes
36 36... ROL $36,X× 9	Clobbers Z&N
27 bytes
EA ... NOP × 27	No requirements

55 cycles

5 bytes
A9 0A LDA #$0A ;hides 'ASL 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
48 ... PHA × 2 A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1	Clobbers Y, S, and Z&N; and writes in stack
A2 06 LDX #6 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
A0 06 LDY #6 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
A2 06 LDX #6 EA ... NOP × 2 CA DEX D0 FB BNE *-3	Clobbers X, and Z&N
A0 06 LDY #6 EA ... NOP × 2 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N
48 PHA A9 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 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 09 LDX #9 CA DEX D0 FD BNE *-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
9 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
14 bytes
68 PLA 48 PHA 68 ... PLA × 12	Clobbers A, S, and Z&N
16 bytes
A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 11 10 F1 BPL *-13	Clobbers A, and Z&N
19 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 26	Requires @zptemp
04 04 NOP $04 EA ... NOP × 26	Requires support for unofficial opcodes
29 bytes
4C xx xx JMP *+3 EA ... NOP × 26	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 LDA #29 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 LDA #22 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' 48 ... PHA × 2 10 FB BPL *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC 10 FA BPL *-4	Clobbers A, Z&N, and C
48 PHA 08 PHP A2 09 LDX #9 CA DEX D0 FD BNE *-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 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP 48 PHA A9 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 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Clobbers S; and writes in stack
10 bytes
08 PHP C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
14 bytes
68 ... PLA × 14	Clobbers A, S, and Z&N
16 bytes
68 PLA \ × 8 48 PHA /	Clobbers A, and Z&N
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 LDA #30 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
A2 08 LDX #8 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 08 LDY #8 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 LDA #23 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 LDA #23 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA A9 E9 LDA #$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
08 PHP A2 07 LDX #7 EA NOP CA DEX D0 FC BNE *-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 A9 2A LDA #$2A ;hides 'ROL 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 48 PHA A9 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
EA ... NOP × 2 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
15 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 12	Clobbers A, S, and Z&N
17 bytes
EA NOP A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 11 10 F1 BPL *-13	Clobbers A, and Z&N
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
85 xx STA @zptemp 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 27	Requires @zptemp
04 04 NOP $04 EA ... NOP × 27	Requires support for unofficial opcodes
30 bytes
4C xx xx JMP *+3 EA ... NOP × 27	Not relocatable code

58 cycles

5 bytes
A9 LDA #31 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
7 bytes
48 PHA A9 E9 LDA #$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
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A2 0A LDX #10 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0A LDY #10 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
20 xx xx JSR @rts12 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; requires @rts12; and writes in stack
08 PHP 48 PHA A9 LDA #17 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 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
15 bytes
EA NOP 68 ... PLA × 14	Clobbers A, S, and Z&N
17 bytes
EA NOP 68 PLA \ × 8 48 PHA /	Clobbers A, and Z&N
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 LDA #32 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 0A LDA #$0A ;hides 'ASL 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
48 PHA A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers Y, 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
68 PLA A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2	Clobbers A, Y, S, Z&N, and D
7 bytes
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
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 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 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
00 00 BRK 0 48 PHA A9 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
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 08 PHP A2 07 LDX #7 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP 48 PHA A9 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
08 PHP F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL 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 28 PLP 00 00... BRK 0 × 4	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Clobbers S; and writes in stack
11 bytes
EA ... NOP × 3 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
15 bytes
68 PLA 48 PHA 68 ... PLA × 13	Clobbers A, S, and Z&N
17 bytes
A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
20 bytes
E6 xx INC @zptemp 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 28	Requires @zptemp
04 04 NOP $04 EA ... NOP × 28	Requires support for unofficial opcodes
31 bytes
4C xx xx JMP *+3 EA ... NOP × 28	Not relocatable code

60 cycles

5 bytes
A9 LDA #33 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
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
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C; and requires @zptemp
48 PHA A9 LDA #26 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 LDA #26 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
EA NOP 38 SEC A9 EB LDA #$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
EA NOP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
48 PHA 18 CLC A9 E9 LDA #$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
EA NOP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
08 PHP 18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 0A LDX #10 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 0A LDY #10 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 2A LDA #$2A ;hides 'ROL A' 00 00 BRK 0 10 FB BPL *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
9 bytes
20 xx xx JSR @rts14 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP 48 PHA A9 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 28 PLP 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
15 bytes
68 ... PLA × 15	Clobbers A, S, and Z&N
18 bytes
EA ... NOP × 2 68 PLA \ × 8 48 PHA /	Clobbers A, and Z&N
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 LDA #34 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 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 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
8 bytes
EA ... NOP × 3 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
08 PHP E6 xx INC @zptemp A0 88 LDY #136 ;hides 'DEY' 30 FD BMI *-1 28 PLP	Clobbers Y; requires @zptemp; and writes in stack
48 ... PHA × 2 A9 E9 LDA #$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 0A LDX #10 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 0A LDY #10 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC 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 × 2 18 CLC 10 FA BPL *-4 28 PLP	Clobbers A; and writes in stack
08 PHP A6 A6 LDX $A6 A2 0A LDX #10 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 0A LDY #10 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 LDA #20 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 EA NOP F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
08 PHP C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 10 FB BPL *-3 68 PLA 28 PLP	Writes in stack
16 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 13	Clobbers A, S, and Z&N
18 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 7 48 PHA /	Clobbers A, and Z&N
21 bytes
EA NOP E6 xx INC @zptemp 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 29	Requires @zptemp
04 04 NOP $04 EA ... NOP × 29	Requires support for unofficial opcodes
32 bytes
4C xx xx JMP *+3 EA ... NOP × 29	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 LDA #35 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A2 F8 LDX #248 ;hides 'SED' E8 INX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
68 PLA 48 PHA A2 F8 LDX #248 ;hides 'SED' E8 INX D0 FC BNE *-2	Clobbers A, X, Z&N, and D
68 PLA 48 PHA A0 F8 LDY #248 ;hides 'SED' C8 INY D0 FC BNE *-2	Clobbers A, Y, Z&N, and D
A2 0B LDX #11 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
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
EA NOP 68 PLA A2 0B LDX #11 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
EA NOP 68 PLA A0 0B LDY #11 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
8 bytes
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
08 PHP 48 PHA A9 LDA #21 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
EA NOP 08 PHP 28 PLP 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Writes in stack
16 bytes
EA NOP 68 ... PLA × 15	Clobbers A, S, and Z&N
18 bytes
68 PLA 48 PHA A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 11 10 F1 BPL *-13	Clobbers A, and Z&N
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 LDA #36 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
A9 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
A9 0A LDA #$0A ;hides 'ASL 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 0C LDA #12 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
A9 0A LDA #$0A ;hides 'ASL 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 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 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 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
8 bytes
EA ... NOP × 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
9 bytes
EA ... NOP × 4 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
E6 xx INC @zptemp 48 PHA A9 E9 LDA #$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 LDA #22 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	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 × 2 10 F8 BPL *-6	Clobbers A, and Z&N; requires dummy interrupt handler; and writes in stack
EA NOP 48 ... PHA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
EA NOP 48 PHA 08 PHP A9 E9 LDA #$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 × 2 A9 2A LDA #$2A ;hides 'ROL 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
10 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC 10 FA BPL *-4 28 PLP	Clobbers A; and writes in stack
11 bytes
08 PHP 48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 08 PHP 28 PLP 90 FB BCC *-3 68 PLA 28 PLP	Writes in stack
16 bytes
68 PLA 48 PHA 68 ... PLA × 14	Clobbers A, S, and Z&N
18 bytes
68 PLA \ × 9 48 PHA /	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 4 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 30	Requires @zptemp
04 04 NOP $04 EA ... NOP × 30	Requires support for unofficial opcodes
33 bytes
4C xx xx JMP *+3 EA ... NOP × 30	Not relocatable code

64 cycles

5 bytes
A9 LDA #37 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
A2 09 LDX #9 EA NOP CA DEX D0 FC BNE *-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 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 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 18 CLC 10 FA BPL *-4	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC 10 F9 BPL *-5	Clobbers A, Z&N, and C
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 28 PLP	Clobbers A; and writes in stack
08 PHP A2 08 LDX #8 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 08 LDY #8 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
08 PHP 48 PHA A9 LDA #23 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA NOP B0 FB BCS *-3 68 PLA 28 PLP	Writes in stack
16 bytes
68 ... PLA × 16	Clobbers A, S, and Z&N
19 bytes
EA NOP 68 PLA 48 PHA A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 11 10 F1 BPL *-13	Clobbers A, and Z&N
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

• From 64 cycles onwards, these tables quit considering writing into stack as a drawback.

65 cycles

5 bytes
A9 LDA #38 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
18 CLC 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 08 LDX #8 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
A0 08 LDY #8 48 PHA 88 DEY D0 FC BNE *-2	Clobbers Y, 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
68 PLA A0 0C LDY #12 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
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
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
48 PHA A9 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 LDA #31 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 D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
8 bytes
EA NOP 38 SEC A9 0C LDA #12 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 4C xx xx JMP *+3 D0 FA BNE *-4	Clobbers A, Z&N, and C; and not relocatable code
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
A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts15 18 CLC 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
48 PHA 38 SEC A9 EB LDA #$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
00 00... BRK 0 × 2 A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, and C; and writes in stack
EA NOP 68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 28 PLP	Clobbers A, and S; and writes in stack
9 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA 28 PLP	Writes in stack
26 26 ROL $26 66 26 ROR $26 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
17 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 14	Clobbers A, S, and Z&N
19 bytes
EA NOP 68 PLA \ × 9 48 PHA /	Clobbers A, and Z&N
22 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	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
85 xx STA @zptemp EA ... NOP × 31	Requires @zptemp
04 04 NOP $04 EA ... NOP × 31	Requires support for unofficial opcodes
34 bytes
4C xx xx JMP *+3 EA ... NOP × 31	Not relocatable code

66 cycles

5 bytes
A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 0D LDY #13 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 LDA #39 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
7 bytes
48 PHA A9 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 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
38 SEC A9 09 LDA #9 EA NOP E9 01 SBC #1 D0 FA BNE *-4	Clobbers A, Z&N, C, and V
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
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
04 04 NOP $04 A9 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL 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
EA ... NOP × 2 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
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
08 PHP 48 PHA A9 LDA #25 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 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA 28 PLP	Requires dummy interrupt handler; 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
17 bytes
EA NOP 68 ... PLA × 16	Clobbers A, S, and Z&N
19 bytes
68 PLA 48 PHA A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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 LDA #40 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
7 bytes
BA TSX A9 0A LDA #$0A ;hides 'ASL 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
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 06 LDY #6 F6 F6 INC $F6,X 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 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 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
A0 06 LDY #6 48 ... PHA × 2 88 DEY D0 FB BNE *-3	Clobbers Y, 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 06 LDY #6 EA NOP 68 PLA 88 DEY D0 FB BNE *-3	Clobbers A, Y, S, and Z&N
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and requires @zptemp
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and requires support for unofficial opcodes
8 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 90 FA BCC *-4	Clobbers A, Z&N, and C
A6 A6 LDX $A6 A2 09 LDX #9 EA NOP CA DEX D0 FC BNE *-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
98 TYA 48 PHA A0 0B LDY #11 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, and Z&N; 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
E6 xx INC @zptemp 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
08 PHP E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 28 PLP	Clobbers A; requires @zptemp; and writes in stack
08 PHP 48 PHA A9 LDA #26 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 48 PHA 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
EA NOP 08 PHP 38 SEC A9 EB LDA #$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
EA NOP 48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers S, Z&N, and C; and writes in stack
EA NOP 48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 28 PLP	Clobbers A, and S; and writes in stack
10 bytes
08 PHP 48 PHA 18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA 28 PLP	Writes in stack
17 bytes
68 PLA 48 PHA 68 ... PLA × 15	Clobbers A, S, and Z&N
19 bytes
A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
23 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 5 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 32	Requires @zptemp
04 04 NOP $04 EA ... NOP × 32	Requires support for unofficial opcodes
35 bytes
4C xx xx JMP *+3 EA ... NOP × 32	Not relocatable code

68 cycles

5 bytes
A9 LDA #41 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
EA NOP A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 0D LDY #13 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3	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 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 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
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 LDA #27 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 04 04 NOP $04 A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
EA NOP 68 ... PLA × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
10 bytes
EA ... NOP × 3 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C
48 PHA 08 PHP 48 PHA A9 E9 LDA #$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 × 2 18 CLC 10 FA BPL *-4 68 PLA 28 PLP	Writes in stack
17 bytes
68 ... PLA × 17	Clobbers A, S, and Z&N
20 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 8 48 PHA /	Clobbers A, and Z&N
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
A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2	Clobbers Y, and Z&N
A2 0A LDX #10 ;hides 'ASL A' CA DEX D0 FC BNE *-2	Clobbers A, X, Z&N, and C
A9 LDA #42 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 18 CLC 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 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 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 0A LDA #$0A ;hides 'ASL 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
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and requires @zptemp
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and requires support for unofficial opcodes
9 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 36 36 ROL $36,X 76 36 ROR $36,X 90 F9 BCC *-5	Clobbers A, Z&N, and C
18 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 15	Clobbers A, S, and Z&N
20 bytes
EA NOP A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 33	Requires @zptemp
04 04 NOP $04 EA ... NOP × 33	Requires support for unofficial opcodes
36 bytes
4C xx xx JMP *+3 EA ... NOP × 33	Not relocatable code

70 cycles

5 bytes
A9 LDA #43 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
68 PLA A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 0D LDY #13 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
EA ... NOP × 2 A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 0D LDY #13 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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 LDA #36 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
EA NOP 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
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 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3 28 PLP	Clobbers A; requires @zptemp; and writes in stack
20 xx xx JSR @rts15 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL 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
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
EA NOP 00 00 BRK 0 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
9 bytes
48 PHA 38 SEC A9 0C LDA #12 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL 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 0C LDA #12 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 4C xx xx JMP *+3 D0 FA BNE *-4	Clobbers A, Z&N, and C; and not relocatable code
08 PHP 48 PHA A9 LDA #29 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
68 PLA 48 PHA 68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
10 bytes
EA ... NOP × 2 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
A5 A5 LDA $A5 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 90 FA BCC *-4	Clobbers A, Z&N, and C
11 bytes
08 PHP E6 xx INC @zptemp 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA 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 A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only 00 00... BRK 0 × 2 10 F8 BPL *-6 68 PLA	Clobbers Z&N; requires dummy interrupt handler; and writes in stack
EA NOP 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
12 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC 10 FA BPL *-4 68 PLA 28 PLP	Writes in stack
18 bytes
EA NOP 68 ... PLA × 17	Clobbers A, S, and Z&N
20 bytes
68 PLA \ × 10 48 PHA /	Clobbers A, and Z&N
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 LDA #44 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
7 bytes
48 PHA A9 LDA #37 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 LDA #37 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP A2 09 LDX #9 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 09 LDY #9 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA A9 E9 LDA #$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
08 PHP 48 PHA A9 LDA #30 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 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
18 bytes
68 PLA 48 PHA 68 ... PLA × 16	Clobbers A, S, and Z&N
21 bytes
36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
24 bytes
E6 xx INC @zptemp 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	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
85 xx STA @zptemp EA ... NOP × 34	Requires @zptemp
04 04 NOP $04 EA ... NOP × 34	Requires support for unofficial opcodes
37 bytes
4C xx xx JMP *+3 EA ... NOP × 34	Not relocatable code

72 cycles

5 bytes
A9 LDA #45 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
48 PHA A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2	Clobbers Y, S, and Z&N; and writes in stack
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
7 bytes
A4 A4 LDY $A4 A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2	Clobbers Y, and Z&N
A6 A6 LDX $A6 A2 0A LDX #10 ;hides 'ASL A' CA DEX D0 FC BNE *-2	Clobbers A, X, Z&N, and C
A2 0D LDX #13 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
48 PHA A9 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 LDA #38 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 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
EA NOP 68 PLA A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
8 bytes
EA ... NOP × 3 A2 0D LDX #13 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
00 00 BRK 0 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
68 PLA 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
48 ... PHA × 3 A9 0A LDA #$0A ;hides 'ASL A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; and writes in stack
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
EA ... NOP × 2 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
98 TYA 48 PHA A0 0C LDY #12 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, and Z&N; and writes in stack
08 PHP A2 08 LDX #8 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 08 LDY #8 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3 28 PLP	Clobbers A; requires @zptemp; and writes in stack
08 PHP 48 PHA A9 LDA #31 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' 04 04 NOP $04 D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires support for unofficial opcodes; and writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
10 bytes
EA NOP 48 PHA 38 SEC A9 0C LDA #12 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 4C xx xx JMP *+3 D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; writes in stack; and not relocatable code
EA NOP 08 PHP 38 SEC A9 0C LDA #12 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 4C xx xx JMP *+3 D0 FA BNE *-4	Clobbers A, Z&N, and C; and not relocatable code
48 PHA A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts15 18 CLC 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts15; and writes in stack
08 PHP 48 PHA 38 SEC A9 EB LDA #$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
00 00... BRK 0 × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' D0 FD BNE *-1 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
EA NOP 68 PLA 48 PHA 68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2	Clobbers A, S, Z&N, and C
11 bytes
08 PHP 28 PLP 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA 28 PLP	Writes in stack
A5 A5 LDA $A5 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 36 36 ROL $36,X 76 36 ROR $36,X 90 F9 BCC *-5	Clobbers A, Z&N, and C
18 bytes
68 ... PLA × 18	Clobbers A, S, and Z&N
21 bytes
EA NOP 68 PLA \ × 10 48 PHA /	Clobbers A, and Z&N
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 LDA #46 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
08 PHP A2 0D LDX #13 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0D LDY #13 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 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 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 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL 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
19 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 16	Clobbers A, S, and Z&N
21 bytes
68 PLA \ × 2 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
25 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X 76 36 ROR $36,X 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 35	Requires @zptemp
04 04 NOP $04 EA ... NOP × 35	Requires support for unofficial opcodes
38 bytes
4C xx xx JMP *+3 EA ... NOP × 35	Not relocatable code

74 cycles

5 bytes
A9 LDA #47 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 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 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
9 bytes
08 PHP BA TSX A9 0A LDA #$0A ;hides 'ASL 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
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 06 LDY #6 F6 F6 INC $F6,X 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA A9 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 09 LDX #9 EA NOP CA DEX D0 FC BNE *-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
68 PLA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3 28 PLP	Clobbers A, S, and Z&N; requires @zptemp; and writes in stack
68 PLA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3 28 PLP	Clobbers A, S, and Z&N; requires support for unofficial opcodes; and writes in stack
10 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 90 FA BCC *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 90 FA BCC *-4 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 08 LDX #8 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 08 LDY #8 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
11 bytes
48 PHA 98 TYA 48 PHA A0 0B LDY #11 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP E6 xx INC @zptemp 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Requires @zptemp; and writes in stack
EA NOP 08 PHP 48 PHA 38 SEC A9 EB LDA #$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
EA NOP 48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
EA NOP 08 PHP 28 PLP 08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only 30 FC BMI *-2 68 PLA 28 PLP	Writes in stack
19 bytes
EA NOP 68 ... PLA × 18	Clobbers A, S, and Z&N
21 bytes
68 PLA 48 PHA A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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 LDA #48 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
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 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 LDA #41 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
EA NOP 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
68 PLA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C
8 bytes
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
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 0D LDY #13 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 0D LDA #13 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 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 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 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
10 bytes
E6 xx INC @zptemp 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
EA NOP 48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL 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
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
19 bytes
68 PLA 48 PHA 68 ... PLA × 17	Clobbers A, S, and Z&N
22 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 9 48 PHA /	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 5 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 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
85 xx STA @zptemp EA ... NOP × 36	Requires @zptemp
04 04 NOP $04 EA ... NOP × 36	Requires support for unofficial opcodes
39 bytes
4C xx xx JMP *+3 EA ... NOP × 36	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 LDA #49 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 A0 88 LDY #136 ;hides 'DEY' EA NOP 30 FC BMI *-2 28 PLP	Clobbers Y; and writes in stack
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
48 PHA A9 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 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 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 0A LDA #$0A ;hides 'ASL 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
EA NOP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; 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 18 CLC 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
EA NOP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
08 PHP A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC 10 FA BPL *-4 28 PLP	Clobbers A; and writes in stack
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 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 28 PLP 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
19 bytes
68 ... PLA × 19	Clobbers A, S, and Z&N
22 bytes
EA NOP 68 PLA 48 PHA A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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 LDA #50 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
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 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 LDA #43 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A2 0A LDX #10 ;hides 'ASL A' CA DEX D0 FC BNE *-2 03 xx SLO (@ptrtemp,X)	Clobbers A, X, Z&N, and C; and requires @ptrtemp, and support for unofficial opcodes
A0 0A LDY #10 ;hides 'ASL A' 88 DEY D0 FC BNE *-2 13 xx SLO (@ptrtemp),Y	Clobbers A, Y, Z&N, and C; and requires @ptrtemp, and support for unofficial opcodes
48 ... PHA × 2 A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
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 A2 0E LDX #14 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
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 × 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
F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
18 CLC A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts14 90 FA BCC *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
EA ... NOP × 2 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
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C
9 bytes
EA ... NOP × 3 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
98 TYA 48 PHA A0 0D LDY #13 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, and Z&N; 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 0D LDY #13 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 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
EA NOP 48 PHA 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
EA NOP 08 PHP 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA 28 PLP	Requires @zptemp; and writes in stack
20 xx xx JSR @rts15 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts15; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
EA NOP 00 00 BRK 0 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC D0 FC BNE *-2 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 0C LDA #12 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
20 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 17	Clobbers A, S, and Z&N
22 bytes
68 PLA \ × 11 48 PHA /	Clobbers A, and Z&N
26 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 37	Requires @zptemp
04 04 NOP $04 EA ... NOP × 37	Requires support for unofficial opcodes
40 bytes
4C xx xx JMP *+3 EA ... NOP × 37	Not relocatable code

78 cycles

5 bytes
A9 LDA #51 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
18 CLC 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 0F LDA #15 E9 01 SBC #1 D0 FB BNE *-3	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 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 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 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
9 bytes
08 PHP 48 PHA A9 LDA #37 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA ... NOP × 2 B0 FA BCS *-4 68 PLA 28 PLP	Writes in stack
20 bytes
EA NOP 68 ... PLA × 19	Clobbers A, S, and Z&N
23 bytes
68 PLA 48 PHA 36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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 LDA #52 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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' C5 C5 CMP $C5 30 FB BMI *-3	Clobbers Y, Z&N, and C
A0 88 LDY #136 ;hides 'DEY' 24 24 BIT $24 30 FB BMI *-3	Clobbers Y, Z&N, and V
A0 88 LDY #136 ;hides 'DEY' A5 A5 LDA $A5 30 FB BMI *-3	Clobbers A, Y, and Z&N
A0 88 LDY #136 ;hides 'DEY' A6 A6 LDX $A6 30 FB BMI *-3	Clobbers X, Y, and Z&N
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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
48 PHA A9 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 LDA #45 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' 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 08 PHP 28 PLP 18 CLC 10 F9 BPL *-5	Clobbers A, Z&N, and C; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 4C xx xx JMP *+3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and not relocatable code
68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C
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
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
9 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 90 F9 BCC *-5	Clobbers A, Z&N, and C
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 A6 A6 LDX $A6 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 A2 0D LDX #13 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; and writes in stack
08 PHP 48 PHA A9 LDA #38 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 0D LDX #13 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
10 bytes
EA NOP 98 TYA 48 PHA A0 0D LDY #13 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, and Z&N; and writes in stack
EA ... NOP × 3 08 PHP A2 0D LDX #13 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
00 00 BRK 0 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 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' 08 PHP 28 PLP 10 FB BPL *-3 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC 10 FA BPL *-4 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC 10 FA BPL *-4 28 PLP	Clobbers A, and S; and writes in stack
11 bytes
48 PHA 98 TYA 48 PHA A0 0C LDY #12 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp D0 FB BNE *-3 68 PLA 28 PLP	Requires @zptemp; and writes in stack
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 D0 FB BNE *-3 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 38 SEC A9 0C LDA #12 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
20 bytes
68 PLA 48 PHA 68 ... PLA × 18	Clobbers A, S, and Z&N
23 bytes
EA NOP 68 PLA \ × 11 48 PHA /	Clobbers A, and Z&N
27 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 6 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 38	Requires @zptemp
04 04 NOP $04 EA ... NOP × 38	Requires support for unofficial opcodes
41 bytes
4C xx xx JMP *+3 EA ... NOP × 38	Not relocatable code

80 cycles

5 bytes
A9 LDA #53 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 #$08' 08 PHP ;first loop only 30 FC BMI *-2	Clobbers A, S, Z&N, C, and V; and writes in stack
68 PLA A2 0F LDX #15 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 0F LDY #15 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
EA ... NOP × 2 A2 0F LDX #15 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 0F LDY #15 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 LDA #46 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 LDA #46 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
8 bytes
38 SEC A9 0B LDA #11 EA NOP E9 01 SBC #1 D0 FA BNE *-4	Clobbers A, Z&N, C, and V
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
68 PLA 00 00 BRK 0 A9 0A LDA #$0A ;hides 'ASL A' 48 PHA D0 FC BNE *-2	Clobbers A, S, Z&N, and C; requires dummy interrupt handler; and writes in stack
9 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 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
48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL 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 28 PLP 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
20 bytes
68 ... PLA × 20	Clobbers A, S, and Z&N
23 bytes
68 PLA \ × 3 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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 10 LDX #16 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 10 LDY #16 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 LDA #54 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 #$18' 18 CLC ;first loop only E6 xx INC @zptemp 90 FA BCC *-4	Clobbers A, Z&N, C, and V; and requires @zptemp
48 PHA A9 LDA #47 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 LDA #47 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
A9 E9 LDA #$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 0A LDA #$0A ;hides 'ASL A' 48 PHA 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
18 CLC 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL 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 08 PHP 28 PLP 18 CLC 10 F9 BPL *-5	Clobbers A, Z&N, and C; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL 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
08 PHP 48 PHA A9 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 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; and writes in stack
EA NOP 68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C
48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 28 PLP	Clobbers A, and S; and writes in stack
10 bytes
C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
26 26 ROL $26 66 26 ROR $26 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
08 PHP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
11 bytes
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
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 90 FA BCC *-4 68 PLA 28 PLP	Writes in stack
21 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 18	Clobbers A, S, and Z&N
23 bytes
68 PLA \ × 2 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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
E6 xx INC @zptemp 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 @zptemp
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
85 xx STA @zptemp EA ... NOP × 39	Requires @zptemp
04 04 NOP $04 EA ... NOP × 39	Requires support for unofficial opcodes
42 bytes
4C xx xx JMP *+3 EA ... NOP × 39	Not relocatable code

82 cycles

5 bytes
A9 LDA #55 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
48 PHA A0 88 LDY #136 ;hides 'DEY' 48 PHA 30 FC BMI *-2	Clobbers Y, S, and Z&N; and writes in stack
A2 09 LDX #9 68 PLA CA DEX D0 FC BNE *-2	Clobbers A, X, S, and Z&N
A0 09 LDY #9 68 PLA 88 DEY D0 FC BNE *-2	Clobbers A, Y, S, and Z&N
7 bytes
A2 09 LDX #9 EA ... NOP × 2 CA DEX D0 FB BNE *-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 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 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 0A LDA #$0A ;hides 'ASL A' 48 PHA 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
EA NOP 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
68 PLA 38 SEC A9 0F LDA #15 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
9 bytes
EA ... NOP × 2 38 SEC A9 0F LDA #15 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
98 TYA 48 PHA A0 0E LDY #14 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, and Z&N; 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
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
08 PHP 48 PHA A9 LDA #41 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA NOP 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 A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
EA NOP 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
68 ... PLA × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C
10 bytes
EA ... NOP × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
EA ... NOP × 2 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
EA ... NOP × 2 08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
21 bytes
EA NOP 68 ... PLA × 20	Clobbers A, S, and Z&N
24 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 10 48 PHA /	Clobbers A, and Z&N
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 LDA #56 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2	Clobbers A, Z&N, C, V, and D
EA NOP A2 10 LDX #16 CA DEX D0 FD BNE *-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 FB BNE *-3	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 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 LDA #49 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' 48 PHA 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and requires @zptemp
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and requires support for unofficial opcodes
9 bytes
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
20 xx xx JSR @rts12 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C; requires @rts12; and writes in stack
08 PHP 48 PHA A9 LDA #42 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL 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 × 2 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
68 ... PLA × 3 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C
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
36 36 ROL $36,X 76 36 ROR $36,X A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
E6 xx INC @zptemp 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
08 PHP E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 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 0A LDA #$0A ;hides 'ASL 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
EA NOP 48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; and writes in stack
EA NOP 48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 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 18 CLC 10 FA BPL *-4 68 PLA 28 PLP	Writes in stack
21 bytes
68 PLA 48 PHA 68 ... PLA × 19	Clobbers A, S, and Z&N
24 bytes
EA NOP 68 PLA \ × 2 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
28 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	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
85 xx STA @zptemp EA ... NOP × 40	Requires @zptemp
04 04 NOP $04 EA ... NOP × 40	Requires support for unofficial opcodes
43 bytes
4C xx xx JMP *+3 EA ... NOP × 40	Not relocatable code

84 cycles

5 bytes
A9 LDA #57 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
48 PHA A2 10 LDX #16 CA DEX D0 FD BNE *-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 10 LDX #16 CA DEX D0 FD BNE *-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 #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12; and writes in stack
48 PHA A9 LDA #50 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 LDA #50 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 ... PLA × 2 A9 E9 LDA #$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 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 4 10 F9 BPL *-5	Clobbers A, S, Z&N, and C; and writes in stack
68 PLA 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3	Clobbers A, S, Z&N, C, and V; and requires support for unofficial opcodes
9 bytes
38 SEC A9 09 LDA #9 EA ... NOP × 2 E9 01 SBC #1 D0 F9 BNE *-5	Clobbers A, Z&N, C, and V
A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 24 24 BIT $24 28 PLP 18 CLC 10 F8 BPL *-6	Clobbers A, Z&N, and C; and writes in stack
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
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 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 LDA #43 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
08 PHP A2 0A LDX #10 ;hides 'ASL A' CA DEX D0 FC BNE *-2 03 xx SLO (@ptrtemp,X) 28 PLP	Clobbers A, and X; requires @ptrtemp, and support for unofficial opcodes; and writes in stack
08 PHP A0 0A LDY #10 ;hides 'ASL A' 88 DEY D0 FC BNE *-2 13 xx SLO (@ptrtemp),Y 28 PLP	Clobbers A, and Y; requires @ptrtemp, and support for unofficial opcodes; 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
68 PLA 08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$5A' 5A NOP ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, S, and Z&N; requires support for unofficial opcodes; and writes in stack
10 bytes
A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 5 18 CLC 10 F7 BPL *-7	Clobbers A, Z&N, and C
EA NOP 98 TYA 48 PHA A0 0E LDY #14 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, and Z&N; 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
F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 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' EA NOP 18 CLC D0 FB BNE *-3 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts14 90 FA BCC *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts14 90 FA BCC *-4 28 PLP	Clobbers A; requires @rts12, and @rts14; and writes in stack
EA ... NOP × 2 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
EA ... NOP × 2 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
48 ... PHA × 3 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; and writes in stack
48 ... PHA × 2 08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 28 PLP	Clobbers A, and S; and writes in stack
11 bytes
48 PHA 98 TYA 48 PHA A0 0D LDY #13 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 98 TYA 48 PHA A0 0D LDY #13 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 28 PLP	Clobbers A; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
21 bytes
68 ... PLA × 21	Clobbers A, S, and Z&N
24 bytes
68 PLA \ × 12 48 PHA /	Clobbers A, and Z&N
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 LDA #58 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
EA NOP 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2	Clobbers A, Z&N, C, V, and D
A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 08 PHP 28 PLP B0 FA BCS *-4	Clobbers A, Z&N, C, and V; and writes in stack
48 PHA A9 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 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
EA NOP 38 SEC A9 10 LDA #16 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 08 PHP 28 PLP 90 FA BCC *-4	Clobbers A, Z&N, and C; and writes in stack
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 0F LDA #15 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 0F LDA #15 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 E6 xx INC @zptemp 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires @zptemp
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 02 INC $0200,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $200-$2FF
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 03 INC $0300,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $300-$3FF
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 04 INC $0400,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $400-$4FF
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 05 INC $0500,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $500-$5FF
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 06 INC $0600,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $600-$6FF
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 07 INC $0700,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $700-$7FF
08 PHP 48 PHA A9 LDA #44 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 A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and requires support for unofficial opcodes
10 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
68 PLA \ × 2 48 PHA / A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
22 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 19	Clobbers A, S, and Z&N
25 bytes
68 PLA \ × 2 48 PHA / 36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
29 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 2 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 41	Requires @zptemp
04 04 NOP $04 EA ... NOP × 41	Requires support for unofficial opcodes
44 bytes
4C xx xx JMP *+3 EA ... NOP × 41	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 LDA #59 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
7 bytes
48 PHA A9 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 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 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2	Clobbers A, S, Z&N, C, V, and D; and writes in stack
8 bytes
A5 A5 LDA $A5 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2	Clobbers A, Z&N, C, V, and D
08 PHP A0 88 LDY #136 ;hides 'DEY' C5 C5 CMP $C5 30 FB BMI *-3 28 PLP	Clobbers Y; 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
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 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 48 PHA 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; 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
9 bytes
48 PHA 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
A5 A5 LDA $A5 38 SEC A9 10 LDA #16 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
08 PHP 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
08 PHP A6 A6 LDX $A6 A2 0F LDX #15 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
08 PHP 48 PHA A9 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 0A LDA #$0A ;hides 'ASL 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
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
10 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 08 PHP 28 PLP 18 CLC 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 4C xx xx JMP *+3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and not relocatable code
68 PLA 48 PHA 68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C
11 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 5 18 CLC 10 F7 BPL *-7	Clobbers A, Z&N, and C
12 bytes
EA NOP 48 PHA 98 TYA 48 PHA A0 0D LDY #13 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
00 00 BRK 0 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 10 FB BPL *-3 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' 08 PHP 28 PLP 18 CLC 10 FA BPL *-4 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 38 SEC A9 0D LDA #13 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
22 bytes
EA NOP 68 ... PLA × 21	Clobbers A, S, and Z&N
25 bytes
EA NOP 68 PLA \ × 12 48 PHA /	Clobbers A, and Z&N
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 LDA #60 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
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
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 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C
EA NOP A2 0C LDX #12 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
EA NOP A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
48 PHA A9 LDA #53 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 LDA #53 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
08 PHP A2 88 LDX #136 ;hides 'DEY' EA NOP CA DEX 30 FB BMI *-3 28 PLP	Clobbers X, and Y; and writes in stack
9 bytes
98 TYA 48 PHA A0 0F LDY #15 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, and Z&N; and writes in stack
EA ... NOP × 2 08 PHP A2 0F LDX #15 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 0F LDY #15 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 LDA #46 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
10 bytes
48 PHA 38 SEC A9 0B LDA #11 EA NOP E9 01 SBC #1 D0 FA BNE *-4 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 38 SEC A9 0B LDA #11 EA NOP E9 01 SBC #1 D0 FA BNE *-4 28 PLP	Clobbers A; and writes in stack
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 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
22 bytes
68 PLA 48 PHA 68 ... PLA × 20	Clobbers A, S, and Z&N
25 bytes
68 PLA \ × 4 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 6 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 / 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
85 xx STA @zptemp EA ... NOP × 42	Requires @zptemp
04 04 NOP $04 EA ... NOP × 42	Requires support for unofficial opcodes
45 bytes
4C xx xx JMP *+3 EA ... NOP × 42	Not relocatable code

88 cycles

5 bytes
A9 LDA #61 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-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 11 LDA #17 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
08 PHP A2 10 LDX #16 CA DEX D0 FD BNE *-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 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 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
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4	Clobbers A, S, Z&N, and C; requires @rts12; and writes in stack
9 bytes
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
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4	Clobbers A, Z&N, and C; requires @rts12; and writes in stack
08 PHP 48 PHA A9 LDA #47 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
48 PHA A9 E9 LDA #$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
48 ... PHA × 3 A9 0A LDA #$0A ;hides 'ASL A' 48 PHA 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
10 bytes
48 PHA 18 CLC 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 18 CLC 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 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
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 0A LDA #$0A ;hides 'ASL 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
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires support for unofficial opcodes
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
11 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 08 PHP 28 PLP 18 CLC 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 4C xx xx JMP *+3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and not relocatable code
A5 A5 LDA $A5 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 02 INC $0200,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $200-$2FF
A5 A5 LDA $A5 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 03 INC $0300,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $300-$3FF
A5 A5 LDA $A5 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 04 INC $0400,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $400-$4FF
A5 A5 LDA $A5 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 05 INC $0500,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $500-$5FF
A5 A5 LDA $A5 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 06 INC $0600,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $600-$6FF
A5 A5 LDA $A5 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP FE 00 07 INC $0700,X 90 F9 BCC *-5	Clobbers A, Z&N, and C; and requires writable $700-$7FF
48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; and writes in stack
EA NOP 68 PLA 48 PHA 68 ... PLA × 2 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, S, Z&N, and C
12 bytes
08 PHP C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
68 PLA 48 PHA 26 26 ROL $26 66 26 ROR $26 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3	Clobbers A, Z&N, and C
22 bytes
68 ... PLA × 22	Clobbers A, S, and Z&N
25 bytes
68 PLA \ × 3 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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 LDA #62 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
A0 88 LDY #136 ;hides 'DEY' 68 PLA 30 FC BMI *-2	Clobbers A, Y, S, and Z&N
6 bytes
A0 88 LDY #136 ;hides 'DEY' EA ... NOP × 2 30 FB BMI *-3	Clobbers Y, and Z&N
A2 0A LDX #10 ;hides 'ASL A' EA NOP CA DEX D0 FB BNE *-3	Clobbers A, X, Z&N, and C
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 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 LDA #55 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' 48 ... PHA × 2 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C
9 bytes
08 PHP A2 09 LDX #9 EA ... NOP × 2 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 09 LDY #9 EA ... NOP × 2 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 LDA #48 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
98 TYA 48 PHA A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2 68 PLA A8 TAY	Clobbers A, and Z&N; and writes in stack
EA NOP 48 PHA 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
EA NOP 08 PHP 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 28 PLP	Clobbers A, and S; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4 68 PLA	Clobbers S, Z&N, and C; requires @zptemp; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 04 04 NOP $04 18 CLC D0 FA BNE *-4 68 PLA	Clobbers S, Z&N, and C; requires support for unofficial opcodes; and writes in stack
11 bytes
48 PHA 98 TYA 48 PHA A0 0E LDY #14 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP 38 SEC A9 0F LDA #15 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
EA NOP 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
12 bytes
EA ... NOP × 2 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
23 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 20	Clobbers A, S, and Z&N
26 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 11 48 PHA /	Clobbers A, and Z&N
30 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 43	Requires @zptemp
04 04 NOP $04 EA ... NOP × 43	Requires support for unofficial opcodes
46 bytes
4C xx xx JMP *+3 EA ... NOP × 43	Not relocatable code

90 cycles

5 bytes
A9 LDA #63 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
EA NOP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2	Clobbers A, Z&N, C, V, and D
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 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 LDA #56 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
48 PHA 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
48 PHA 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
EA NOP 38 SEC A9 11 LDA #17 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
08 PHP 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 10 LDX #16 CA DEX D0 FD BNE *-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 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C
08 PHP 48 PHA A9 LDA #49 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
EA ... NOP × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 85 xx STA @zptemp 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
20 xx xx JSR @rts12 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @rts12; and writes in stack
EA ... NOP × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL 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 × 2 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 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
36 36 ROL $36,X 76 36 ROR $36,X 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP E6 xx INC @zptemp 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 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
EA NOP 48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
EA NOP 08 PHP C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
23 bytes
EA NOP 68 ... PLA × 22	Clobbers A, S, and Z&N
26 bytes
EA NOP 68 PLA \ × 3 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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 12 LDY #18 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 LDA #64 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 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 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
68 PLA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C
48 PHA 08 PHP A2 10 LDX #16 CA DEX D0 FD BNE *-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
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 26 26 ROL $26 66 26 ROR $26 90 F9 BCC *-5	Clobbers A, Z&N, and C
08 PHP A6 A6 LDX $A6 A2 10 LDX #16 CA DEX D0 FD BNE *-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 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
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP E6 xx INC @zptemp 28 PLP 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
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 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC 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 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
68 PLA 98 TYA 48 PHA A0 0F LDY #15 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, S, and Z&N; and writes in stack
48 ... PHA × 2 A9 E9 LDA #$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
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 24 24 BIT $24 28 PLP 18 CLC 10 F8 BPL *-6 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 38 SEC A9 09 LDA #9 EA ... NOP × 2 E9 01 SBC #1 D0 F9 BNE *-5 28 PLP	Clobbers A; and writes in stack
12 bytes
EA NOP 48 PHA 98 TYA 48 PHA A0 0E LDY #14 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP 48 PHA 18 CLC A9 2A LDA #$2A ;hides 'ROL A' 20 xx xx JSR @rts14 90 FA BCC *-4 68 PLA 28 PLP	Requires @rts12, and @rts14; and writes in stack
EA ... NOP × 2 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 × 2 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
08 PHP 48 PHA 98 TYA 48 PHA A0 0D LDY #13 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA 28 PLP	Writes in stack
23 bytes
68 PLA 48 PHA 68 ... PLA × 21	Clobbers A, S, and Z&N
26 bytes
68 PLA \ × 13 48 PHA /	Clobbers A, and Z&N
31 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 44	Requires @zptemp
04 04 NOP $04 EA ... NOP × 44	Requires support for unofficial opcodes
47 bytes
4C xx xx JMP *+3 EA ... NOP × 44	Not relocatable code

92 cycles

5 bytes
A9 LDA #65 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
A2 0D LDX #13 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A0 0D LDY #13 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 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 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 10 FC BPL *-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 × 2 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2	Clobbers A, Z&N, C, V, and D
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
A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA NOP F6 F6 INC $F6,X B0 F9 BCS *-5	Clobbers A, Z&N, C, and V; and requires @zptemp, and writable $00-$FF
A9 2A LDA #$2A ;hides 'ROL 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 38 SEC A9 11 LDA #17 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
EA NOP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 2 D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
9 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only 08 PHP 28 PLP B0 FA BCS *-4 68 PLA	Clobbers Z&N, C, and V; and writes in stack
EA ... NOP × 2 38 SEC A9 11 LDA #17 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
EA NOP 08 PHP 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp
08 PHP 48 PHA A9 LDA #51 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' EA NOP 08 PHP 28 PLP 90 FA BCC *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
EA NOP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C
11 bytes
08 PHP 48 PHA 38 SEC A9 0F LDA #15 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
23 bytes
68 ... PLA × 23	Clobbers A, S, and Z&N
27 bytes
68 PLA \ × 3 48 PHA / 36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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 LDA #66 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
EA NOP A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 12 LDY #18 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3	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 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 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
EA ... NOP × 2 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
48 ... PHA × 2 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
9 bytes
F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
08 PHP 48 PHA A9 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 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA	Clobbers S, Z&N, C, V, and D; and writes in stack
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C
48 PHA 08 PHP 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 28 PLP	Clobbers A, and S; and writes in stack
10 bytes
24 24 BIT $24 48 PHA 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' 26 26 ROL $26 66 26 ROR $26 90 F9 BCC *-5	Clobbers A, Z&N, and C
08 PHP A5 A5 LDA $A5 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-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 FB BNE *-3 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
11 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 68 PLA 28 PLP	Writes in stack
24 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 21	Clobbers A, S, and Z&N
27 bytes
EA NOP 68 PLA \ × 13 48 PHA /	Clobbers A, and Z&N
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
E6 xx INC @zptemp 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 @zptemp
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
85 xx STA @zptemp EA ... NOP × 45	Requires @zptemp
04 04 NOP $04 EA ... NOP × 45	Requires support for unofficial opcodes
48 bytes
4C xx xx JMP *+3 EA ... NOP × 45	Not relocatable code

94 cycles

5 bytes
A9 LDA #67 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 12 LDY #18 88 DEY D0 FD BNE *-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 12 LDY #18 88 DEY D0 FD BNE *-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 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 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
38 SEC A9 0D LDA #13 EA NOP E9 01 SBC #1 D0 FA BNE *-4	Clobbers A, Z&N, C, and V
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
9 bytes
48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C
08 PHP A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4 28 PLP	Clobbers A; and writes in stack
EA NOP 08 PHP A2 0C LDX #12 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 0C LDY #12 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 LDA #53 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
48 PHA 98 TYA 48 PHA A0 0F LDY #15 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 48 PHA 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
12 bytes
08 PHP 48 PHA 38 SEC A9 0B LDA #11 EA NOP E9 01 SBC #1 D0 FA BNE *-4 68 PLA 28 PLP	Writes in stack
24 bytes
EA NOP 68 ... PLA × 23	Clobbers A, S, and Z&N
27 bytes
68 PLA \ × 5 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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 LDA #68 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
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
68 PLA A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 12 LDY #18 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
EA ... NOP × 2 A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 12 LDY #18 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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 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 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-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 11 LDA #17 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 48 PHA A9 LDA #54 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 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
EA ... NOP × 2 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts12 10 FA BPL *-4 68 PLA	Clobbers Z&N, and C; requires @rts12; and writes in stack
08 PHP 48 PHA A9 E9 LDA #$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
48 ... PHA × 2 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 08 PHP 28 PLP 90 FA BCC *-4 68 PLA	Clobbers S, Z&N, and C; and writes in stack
12 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 68 PLA 28 PLP	Writes in stack
24 bytes
68 PLA 48 PHA 68 ... PLA × 22	Clobbers A, S, and Z&N
27 bytes
68 PLA \ × 4 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
32 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 46	Requires @zptemp
04 04 NOP $04 EA ... NOP × 46	Requires support for unofficial opcodes
49 bytes
4C xx xx JMP *+3 EA ... NOP × 46	Not relocatable code

96 cycles

5 bytes
A2 13 LDX #19 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 13 LDY #19 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 LDA #69 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
7 bytes
48 PHA A9 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 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
08 PHP A0 88 LDY #136 ;hides 'DEY' EA ... NOP × 2 30 FB BMI *-3 28 PLP	Clobbers Y; and writes in stack
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
18 CLC 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 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
68 ... PLA × 2 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2	Clobbers A, S, Z&N, C, V, and D
48 PHA 38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V; 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
A5 A5 LDA $A5 38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
18 CLC 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
08 PHP A2 0B LDX #11 C5 C5 CMP $C5 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 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 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C
08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4 28 PLP	Clobbers A; and writes in stack
12 bytes
48 PHA 98 TYA 48 PHA A0 0B LDY #11 EA NOP 88 DEY D0 FC BNE *-2 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
EA NOP 08 PHP 48 PHA 38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA NOP B0 FB BCS *-3 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
48 PHA 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' B8 CLV 50 00 BVC *+2 D0 FA BNE *-4 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 38 SEC A9 0F LDA #15 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
24 bytes
68 ... PLA × 24	Clobbers A, S, and Z&N
28 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 12 48 PHA /	Clobbers A, and Z&N
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 LDA #70 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
18 CLC 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 0C LDX #12 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3	Clobbers X, Z&N, and C
A0 0C LDY #12 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3	Clobbers Y, Z&N, and C
A2 0C LDX #12 24 24 BIT $24 CA DEX D0 FB BNE *-3	Clobbers X, Z&N, and V
A0 0C LDY #12 24 24 BIT $24 88 DEY D0 FB BNE *-3	Clobbers Y, Z&N, and V
A2 08 LDX #8 08 PHP 28 PLP CA DEX D0 FB BNE *-3	Clobbers X, and Z&N; and writes in stack
A0 08 LDY #8 08 PHP 28 PLP 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N; and writes in stack
A2 0C LDX #12 A5 A5 LDA $A5 CA DEX D0 FB BNE *-3	Clobbers A, X, and Z&N
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
A0 0C LDY #12 85 xx STA @zptemp 88 DEY D0 FB BNE *-3	Clobbers Y, and Z&N; and requires @zptemp
48 PHA A9 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 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 × 3 A2 12 LDX #18 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 12 LDY #18 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only EA NOP E6 xx INC @zptemp 90 F9 BCC *-5	Clobbers A, Z&N, C, and V; and requires @zptemp
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only FE 00 02 INC $0200,X 90 F9 BCC *-5	Clobbers A, Z&N, C, and V; and requires writable $200-$2FF
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only FE 00 03 INC $0300,X 90 F9 BCC *-5	Clobbers A, Z&N, C, and V; and requires writable $300-$3FF
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only FE 00 04 INC $0400,X 90 F9 BCC *-5	Clobbers A, Z&N, C, and V; and requires writable $400-$4FF
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only FE 00 05 INC $0500,X 90 F9 BCC *-5	Clobbers A, Z&N, C, and V; and requires writable $500-$5FF
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only FE 00 06 INC $0600,X 90 F9 BCC *-5	Clobbers A, Z&N, C, and V; and requires writable $600-$6FF
A9 69 LDA #$69 ;hides 'ADC #$18' 18 CLC ;first loop only FE 00 07 INC $0700,X 90 F9 BCC *-5	Clobbers A, Z&N, C, and V; and requires writable $700-$7FF
68 PLA 38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
9 bytes
EA NOP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
EA NOP 08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 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
08 PHP 48 PHA A9 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 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
25 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 22	Clobbers A, S, and Z&N
28 bytes
EA NOP 68 PLA \ × 4 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
33 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 3 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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
85 xx STA @zptemp EA ... NOP × 47	Requires @zptemp
04 04 NOP $04 EA ... NOP × 47	Requires support for unofficial opcodes

98 cycles

5 bytes
A9 LDA #71 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
EA NOP A2 13 LDX #19 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 13 LDY #19 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3	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 12 LDY #18 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 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 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; and writes in stack
9 bytes
48 PHA A9 E9 LDA #$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
08 PHP 48 PHA A9 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
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
11 bytes
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 26 26 ROL $26 66 26 ROR $26 90 F9 BCC *-5 68 PLA	Clobbers Z&N, and C; 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 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP E6 xx INC @zptemp 28 PLP 10 F9 BPL *-5 68 PLA 28 PLP	Requires @zptemp; and writes in stack
00 00 BRK 0 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA NOP 18 CLC D0 FB BNE *-3 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 48 PHA A9 E9 LDA #$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
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 24 24 BIT $24 28 PLP 18 CLC 10 F8 BPL *-6 68 PLA 28 PLP	Writes in stack
25 bytes
EA NOP 68 ... PLA × 24	Clobbers A, S, and Z&N
28 bytes
68 PLA \ × 14 48 PHA /	Clobbers A, and Z&N
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 LDA #72 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 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 18 CLC 10 FA BPL *-4	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
EA ... NOP × 2 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
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 0D LDY #13 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
9 bytes
38 SEC A9 0C LDA #12 24 24 BIT $24 E9 01 SBC #1 D0 F9 BNE *-5	Clobbers A, Z&N, C, and V
08 PHP 48 PHA A9 LDA #58 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, S, Z&N, and C
68 PLA 08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 28 PLP	Clobbers A, S, and Z&N; 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 × 2 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA	Clobbers Z&N, C, V, and D; and writes in stack
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
EA ... NOP × 2 08 PHP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 28 PLP	Clobbers A; and writes in stack
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$2A' 2A ROL A ;first loop only EA NOP F6 F6 INC $F6,X B0 F9 BCS *-5 68 PLA	Clobbers Z&N, C, and V; requires @zptemp, and writable $00-$FF; and writes in stack
48 PHA A9 2A LDA #$2A ;hides 'ROL A' 00 00... BRK 0 × 2 10 F9 BPL *-5 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
11 bytes
EA NOP 08 PHP 48 PHA 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
25 bytes
68 PLA 48 PHA 68 ... PLA × 23	Clobbers A, S, and Z&N
29 bytes
68 PLA \ × 4 48 PHA / 36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 7 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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

100 cycles

5 bytes
A9 LDA #73 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
EA ... NOP × 2 A2 13 LDX #19 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 13 LDY #19 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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 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 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
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 12 LDY #18 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; requires @zptemp; and writes in stack
EA NOP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, S, Z&N, and C; and writes in stack
9 bytes
48 PHA 38 SEC A9 12 LDA #18 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 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 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
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and requires @zptemp
EA ... NOP × 2 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
11 bytes
EA NOP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
48 PHA 08 PHP 48 PHA 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA 28 PLP	Clobbers S; and writes in stack
12 bytes
08 PHP 24 24 BIT $24 48 PHA 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
25 bytes
68 ... PLA × 25	Clobbers A, S, and Z&N
29 bytes
EA NOP 68 PLA \ × 14 48 PHA /	Clobbers A, and Z&N
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 14 LDY #20 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 LDA #74 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
7 bytes
48 PHA A9 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 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 FA BNE *-4	Clobbers A, Z&N, C, and V
F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL 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
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, S, Z&N, and C; 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 12 LDY #18 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
EA ... NOP × 3 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
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 12 LDY #18 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 @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 LDA #60 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' 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 FA BNE *-4 28 PLP	Clobbers A; and writes in stack
F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, S, Z&N, and C
11 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4 68 PLA 28 PLP	Writes in stack
EA ... NOP × 3 A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
26 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 23	Clobbers A, S, and Z&N
29 bytes
68 PLA \ × 6 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
34 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	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

102 cycles

5 bytes
A9 LDA #75 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
F6 F6 INC $F6,X A0 13 LDY #19 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 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 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
48 ... PHA × 2 A0 13 LDY #19 88 DEY D0 FD BNE *-1	Clobbers Y, 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
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 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 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
A6 A6 LDX $A6 A2 0E LDX #14 EA NOP CA DEX D0 FC BNE *-2	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 0E LDY #14 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
38 SEC A9 EB LDA #$EB ;hides 'SBC #$1A' 1A NOP ;first loop only EA ... NOP × 2 B0 FA BCS *-4	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
68 PLA 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
9 bytes
EA ... NOP × 2 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
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 12 LDY #18 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 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 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
26 bytes
EA NOP 68 ... PLA × 25	Clobbers A, S, and Z&N
29 bytes
68 PLA \ × 5 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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 LDA #76 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
EA NOP A2 14 LDX #20 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 14 LDY #20 88 DEY D0 FD BNE *-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 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3	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 13 LDY #19 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 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 LDA #69 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 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
9 bytes
08 PHP 48 PHA A9 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
8C TXA 48 PHA A2 0D LDX #13 EA NOP CA DEX D0 FC BNE *-2 68 PLA AA TAX	Clobbers A, and Z&N; and writes in stack
48 PHA 18 CLC 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 18 CLC 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 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
48 ... PHA × 2 38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP 38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A, and S; and writes in stack
11 bytes
48 PHA 18 CLC 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 A5 A5 LDA $A5 38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
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
12 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 2 18 CLC D0 FA BNE *-4 68 PLA 28 PLP	Writes in stack
26 bytes
68 PLA 48 PHA 68 ... PLA × 24	Clobbers A, S, and Z&N
30 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 13 48 PHA /	Clobbers A, and Z&N
35 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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

104 cycles

5 bytes
A9 LDA #77 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 14 LDY #20 88 DEY D0 FD BNE *-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 14 LDY #20 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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 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 18 CLC 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 $04 00 00 BRK 0 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires dummy interrupt handler, and support for unofficial opcodes; and writes in stack
48 PHA A9 E9 LDA #$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
9 bytes
48 PHA 18 CLC 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 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP A2 0C LDX #12 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0C LDY #12 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
F6 F6 INC $F6,X 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V; and requires @zptemp, and writable $00-$FF
08 PHP 48 PHA A9 LDA #63 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
04 04 NOP $04 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
EA NOP 68 PLA 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
10 bytes
A5 A5 LDA $A5 38 SEC A9 0E LDA #14 EA NOP E9 01 SBC #1 D0 FA BNE *-4	Clobbers A, Z&N, C, and V
11 bytes
EA NOP 08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 CLC 90 00 BCC *+2 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
26 bytes
68 ... PLA × 26	Clobbers A, S, and Z&N
30 bytes
EA NOP 68 PLA \ × 5 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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 LDA #78 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
A2 0D LDX #13 48 PHA CA DEX D0 FC BNE *-2	Clobbers X, S, and Z&N; and writes in stack
A0 0D LDY #13 48 PHA 88 DEY D0 FC BNE *-2	Clobbers Y, 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
68 PLA A0 14 LDY #20 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
EA ... NOP × 2 A2 14 LDX #20 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 14 LDY #20 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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 LDA #71 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
EA NOP 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 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
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 13 LDY #19 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 2 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
9 bytes
48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
08 PHP 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 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 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; and writes in stack
11 bytes
08 PHP 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only EA ... NOP × 2 30 FA BMI *-4 68 PLA 28 PLP	Writes in stack
27 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 24	Clobbers A, S, and Z&N
30 bytes
68 PLA \ × 15 48 PHA /	Clobbers A, and Z&N
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
E6 xx INC @zptemp 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 @zptemp
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

106 cycles

5 bytes
A2 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
A9 LDA #79 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 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 0A LDA #$0A ;hides 'ASL 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 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
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 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 18 CLC 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 18 CLC 10 FA BPL *-4 28 PLP	Clobbers A; requires dummy interrupt handler; and writes in stack
68 PLA 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 28 PLP	Clobbers A, S, and Z&N; and writes in stack
10 bytes
EA ... NOP × 2 48 PHA 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
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
EA ... NOP × 2 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
11 bytes
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 × 2 08 PHP 48 PHA 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only 10 FC BPL *-2 68 PLA 28 PLP	Writes in stack
27 bytes
EA NOP 68 ... PLA × 26	Clobbers A, S, and Z&N
31 bytes
68 PLA \ × 5 48 PHA / 36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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 LDA #80 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 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
68 PLA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 2 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
9 bytes
38 SEC A9 0D LDA #13 24 24 BIT $24 E9 01 SBC #1 D0 F9 BNE *-5	Clobbers A, Z&N, C, and V
98 TYA 48 PHA A0 13 LDY #19 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, and Z&N; 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 13 LDY #19 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 LDA #66 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
68 PLA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, S, Z&N, and C
10 bytes
EA NOP 48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
EA NOP 08 PHP 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
E6 xx INC @zptemp 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
EA NOP 48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
27 bytes
68 PLA 48 PHA 68 ... PLA × 25	Clobbers A, S, and Z&N
31 bytes
EA NOP 68 PLA \ × 15 48 PHA /	Clobbers A, and Z&N
36 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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

108 cycles

5 bytes
A9 LDA #81 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
EA NOP A2 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA NOP A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
7 bytes
38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3	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 14 LDY #20 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 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 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 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
9 bytes
08 PHP 48 PHA A9 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
EA NOP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 2 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
10 bytes
48 PHA 38 SEC A9 0E LDA #14 EA NOP E9 01 SBC #1 D0 FA BNE *-4 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 FA BNE *-4 28 PLP	Clobbers A; and writes in stack
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and requires @zptemp
F6 F6 INC $F6,X 48 PHA A9 0A LDA #$0A ;hides 'ASL 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 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, and C; and writes in stack
11 bytes
EA ... NOP × 3 48 PHA 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
EA NOP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
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 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP \ × 2 28 PLP / 10 F9 BPL *-5 68 PLA 28 PLP	Writes in stack
27 bytes
68 ... PLA × 27	Clobbers A, S, and Z&N
31 bytes
68 PLA \ × 7 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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 LDA #82 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
A0 88 LDY #136 ;hides 'DEY' F6 F6 INC $F6,X 30 FB BMI *-3	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A2 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 PHA A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers Y, 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
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 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
A4 A4 LDY $A4 A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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 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 18 CLC 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires @rts12, and @rts15; and writes in stack
18 CLC A9 F4 LDA #244 ;hides 'NOP zp,X' EA NOP 69 01 ADC #1 D0 F9 BNE *-5	Clobbers A, Z&N, C, and V; and requires support for unofficial opcodes
A9 0A LDA #$0A ;hides 'ASL A' 48 PHA 20 xx xx JSR @rts14 10 F9 BPL *-5	Clobbers A, S, Z&N, and C; requires @rts12, and @rts14; and writes in stack
9 bytes
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
F6 F6 INC $F6,X 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V; and requires @zptemp, and writable $00-$FF
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP F6 F6 INC $F6,X 28 PLP 90 F9 BCC *-5	Clobbers A, Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X A0 13 LDY #19 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
20 xx xx JSR @rts14 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
08 PHP 48 PHA A9 LDA #68 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 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 48 ... PHA × 2 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; 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 13 LDY #19 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
EA NOP 38 SEC A9 0D LDA #13 24 24 BIT $24 E9 01 SBC #1 D0 F9 BNE *-5	Clobbers A, Z&N, C, and V
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP E6 xx INC @zptemp F6 F6 INC $F6,X 90 F8 BCC *-6	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, S, Z&N, and C
11 bytes
EA ... NOP × 3 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
28 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 25	Clobbers A, S, and Z&N
31 bytes
68 PLA \ × 6 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
37 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 4 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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

110 cycles

5 bytes
A9 LDA #83 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
68 PLA A2 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
EA ... NOP × 2 A2 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 2 A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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 LDA #76 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
68 PLA 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
EA NOP 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
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 14 LDY #20 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
9 bytes
48 PHA 38 SEC A9 14 LDA #20 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 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 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 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
12 bytes
48 PHA 8C TXA 48 PHA A2 0D LDX #13 EA NOP CA DEX D0 FC BNE *-2 68 PLA AA TAX 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 48 PHA 18 CLC 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
08 PHP 28 PLP 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
48 PHA 08 PHP 48 PHA 38 SEC A9 12 LDA #18 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP \ × 2 28 PLP / 10 F9 BPL *-5 68 PLA 28 PLP	Writes in stack
28 bytes
EA NOP 68 ... PLA × 27	Clobbers A, S, and Z&N
32 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 14 48 PHA /	Clobbers A, and Z&N
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 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and writes in stack
48 PHA A9 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 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
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 14 LDY #20 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
9 bytes
A9 0A LDA #$0A ;hides 'ASL A' 18 ... CLC × 2 90 00 BCC *+2 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
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 14 LDY #20 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 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 18 CLC 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 18 CLC 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
68 PLA 98 TYA 48 PHA A0 13 LDY #19 88 DEY D0 FD BNE *-1 68 PLA A8 TAY	Clobbers A, S, and Z&N; 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 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
28 bytes
68 PLA 48 PHA 68 ... PLA × 26	Clobbers A, S, and Z&N
32 bytes
EA NOP 68 PLA \ × 6 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 8 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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

112 cycles

5 bytes
A9 LDA #85 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
F6 F6 INC $F6,X A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N; and requires @zptemp, and writable $00-$FF
48 PHA A9 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 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 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 ... PHA × 2 A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
EA NOP 68 PLA A2 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
EA NOP 68 PLA A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
8 bytes
EA ... NOP × 3 A2 15 LDX #21 CA DEX D0 FD BNE *-1	Clobbers X, and Z&N
EA ... NOP × 3 A0 15 LDY #21 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
68 PLA 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 90 FB BCC *-3	Clobbers A, S, Z&N, and C; requires dummy interrupt handler; and writes in stack
9 bytes
EA ... NOP × 2 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
8C TXA 48 PHA A2 14 LDX #20 CA DEX D0 FD BNE *-1 68 PLA AA TAX	Clobbers A, and Z&N; and writes in stack
08 PHP A2 0D LDX #13 C5 C5 CMP $C5 CA DEX D0 FB BNE *-3 28 PLP	Clobbers X; and writes in stack
08 PHP A0 0D LDY #13 C5 C5 CMP $C5 88 DEY D0 FB BNE *-3 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 LDA #71 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 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
EA NOP 08 PHP 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C
28 bytes
68 ... PLA × 28	Clobbers A, S, and Z&N
32 bytes
68 PLA \ × 16 48 PHA /	Clobbers A, and Z&N
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 LDA #86 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
18 CLC 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 10 LDX #16 EA NOP CA DEX D0 FC BNE *-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 15 LDX #21 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A0 15 LDY #21 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 PHA A9 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 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 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and writes in stack
9 bytes
08 PHP 48 PHA A9 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
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 18 ... CLC × 2 90 00 BCC *+2 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
48 ... PHA × 2 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 PHA 08 PHP 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A, and S; and writes in stack
11 bytes
24 24 BIT $24 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP A5 A5 LDA $A5 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; 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 18 CLC 10 FA BPL *-4 68 PLA 28 PLP	Requires dummy interrupt handler; and writes in stack
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 3 18 CLC D0 F9 BNE *-5 68 PLA	Clobbers S, Z&N, and C; and writes in stack
12 bytes
EA ... NOP × 2 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
29 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 26	Clobbers A, S, and Z&N
33 bytes
68 PLA \ × 6 48 PHA / 36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
38 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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

114 cycles

5 bytes
A9 LDA #87 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 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
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
9 bytes
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and writes in stack
08 PHP 48 PHA A9 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 8C TXA 48 PHA A2 14 LDX #20 CA DEX D0 FD BNE *-1 68 PLA AA TAX	Clobbers A, and Z&N; and writes in stack
11 bytes
48 PHA 98 TYA 48 PHA A0 13 LDY #19 88 DEY D0 FD BNE *-1 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 18 ... CLC × 2 90 00 BCC *+2 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
08 PHP 38 SEC A9 0D LDA #13 24 24 BIT $24 E9 01 SBC #1 D0 F9 BNE *-5 28 PLP	Clobbers A; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 38 SEC A9 13 LDA #19 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
29 bytes
EA NOP 68 ... PLA × 28	Clobbers A, S, and Z&N
33 bytes
EA NOP 68 PLA \ × 16 48 PHA /	Clobbers A, and Z&N
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 LDA #88 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
68 PLA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V
68 PLA A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers A, X, S, and Z&N
68 PLA A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers A, Y, S, and Z&N
7 bytes
EA ... NOP × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V
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 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 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 15 LDX #21 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA NOP 08 PHP A0 15 LDY #21 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
18 CLC A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 90 FA BCC *-4	Clobbers A, Z&N, and C; requires @rts12, and @rts14; and writes in stack
68 PLA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
9 bytes
48 PHA 38 SEC A9 15 LDA #21 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 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 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
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA NOP 36 36 ROL $36,X 76 36 ROR $36,X 90 F8 BCC *-6	Clobbers A, Z&N, and C
00 00 BRK 0 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires dummy interrupt handler; and writes in stack
11 bytes
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 FA BNE *-4 68 PLA 28 PLP	Writes in stack
29 bytes
68 PLA 48 PHA 68 ... PLA × 27	Clobbers A, S, and Z&N
33 bytes
68 PLA \ × 8 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
39 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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

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 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 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
08 PHP A0 88 LDY #136 ;hides 'DEY' F6 F6 INC $F6,X 30 FB BMI *-3 28 PLP	Clobbers Y; requires @zptemp, and writable $00-$FF; and writes in stack
48 PHA 08 PHP A2 15 LDX #21 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 PHA 08 PHP A0 15 LDY #21 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 15 LDX #21 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
08 PHP A4 A4 LDY $A4 A0 15 LDY #21 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; requires @zptemp; and writes in stack
08 PHP 48 PHA A9 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 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
10 bytes
EA NOP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4	Clobbers A, Z&N, and C; and writes in stack
48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 18 CLC 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 18 CLC 10 F9 BPL *-5 28 PLP	Clobbers A; requires @rts12, and @rts15; and writes in stack
48 PHA 18 CLC A9 F4 LDA #244 ;hides 'NOP zp,X' EA NOP 69 01 ADC #1 D0 F9 BNE *-5 68 PLA	Clobbers Z&N, C, and V; requires support for unofficial opcodes; and writes in stack
08 PHP 18 CLC A9 F4 LDA #244 ;hides 'NOP zp,X' EA NOP 69 01 ADC #1 D0 F9 BNE *-5 28 PLP	Clobbers A; requires support for unofficial opcodes; and writes in stack
68 PLA 8C TXA 48 PHA A2 14 LDX #20 CA DEX D0 FD BNE *-1 68 PLA AA TAX	Clobbers A, S, and Z&N; and writes in stack
11 bytes
98 TYA 48 PHA A0 0D LDY #13 A5 A5 LDA $A5 88 DEY D0 FB BNE *-3 68 PLA A8 TAY	Clobbers A, and Z&N; and writes in stack
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' 18 ... CLC × 2 90 00 BCC *+2 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C; and requires @zptemp
48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP F6 F6 INC $F6,X 28 PLP 90 F9 BCC *-5 68 PLA	Clobbers Z&N, and C; requires @zptemp, and writable $00-$FF; and writes in stack
08 PHP F6 F6 INC $F6,X 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; requires @zptemp, and writable $00-$FF; and writes in stack
20 xx xx JSR @rts14 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
20 xx xx JSR @rts14 08 PHP A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 28 PLP	Clobbers A; requires @rts12, and @rts14; and writes in stack
48 ... PHA × 3 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
48 ... PHA × 2 08 PHP 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A, and S; and writes in stack
12 bytes
08 PHP 28 PLP 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
EA NOP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' 18 ... CLC × 2 90 00 BCC *+2 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
29 bytes
68 ... PLA × 29	Clobbers A, S, and Z&N
33 bytes
68 PLA \ × 7 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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 LDA #90 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
7 bytes
A2 0D LDX #13 ;hides 'ORA abs' A5 A5 LDA $A5 CA DEX D0 FA BNE *-4	Clobbers A, X, and Z&N
A0 0D LDY #13 ;hides 'ORA abs' A5 A5 LDA $A5 88 DEY D0 FA BNE *-4	Clobbers A, 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
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 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 LDA #83 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 #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, S, Z&N, C, and V
48 ... PHA × 2 A2 16 LDX #22 CA DEX D0 FD BNE *-1	Clobbers X, S, and Z&N; and writes in stack
48 ... PHA × 2 A0 16 LDY #22 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
8 bytes
EA ... NOP × 3 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2	Clobbers A, Z&N, C, and V
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
8C TXA 48 PHA A2 15 LDX #21 CA DEX D0 FD BNE *-1 68 PLA AA TAX	Clobbers A, and Z&N; and writes in stack
EA ... NOP × 2 08 PHP A2 15 LDX #21 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 2 08 PHP A0 15 LDY #21 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
08 PHP 48 PHA A9 LDA #76 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 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3 68 PLA	Clobbers Z&N, C, and V; and writes in stack
EA NOP 08 PHP 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' EA NOP 36 36 ROL $36,X 76 36 ROR $36,X 90 F8 BCC *-6	Clobbers A, Z&N, and C
30 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 27	Clobbers A, S, and Z&N
34 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 15 48 PHA /	Clobbers A, and Z&N
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
E6 xx INC @zptemp 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 @zptemp
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

118 cycles

5 bytes
A9 LDA #91 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
6 bytes
18 CLC 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 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 48 PHA A9 LDA #77 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
11 bytes
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 ... CLC × 2 90 00 BCC *+2 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
12 bytes
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts14 18 CLC 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 08 PHP 28 PLP 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
30 bytes
EA NOP 68 ... PLA × 29	Clobbers A, S, and Z&N
34 bytes
EA NOP 68 PLA \ × 7 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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 LDA #92 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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
A0 88 LDY #136 ;hides 'DEY' 68 PLA 48 PHA 30 FB BMI *-3	Clobbers A, Y, and Z&N
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 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 LDA #85 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 08 PHP 28 PLP D0 FA BNE *-4	Clobbers A, S, Z&N, and C; and writes in stack
8 bytes
A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 24 24 BIT $24 28 PLP D0 F9 BNE *-5	Clobbers A, Z&N, and C; and writes in stack
9 bytes
A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
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 F6 F6 INC $F6,X A0 15 LDY #21 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 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 15 LDX #21 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 15 LDY #21 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
EA NOP 8C TXA 48 PHA A2 15 LDX #21 CA DEX D0 FD BNE *-1 68 PLA AA TAX	Clobbers A, and Z&N; and writes in stack
EA ... NOP × 3 08 PHP A2 15 LDX #21 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 3 08 PHP A0 15 LDY #21 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
48 ... PHA × 2 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 90 FB BCC *-3 68 PLA	Clobbers S, Z&N, and C; requires dummy interrupt handler; and writes in stack
48 PHA 08 PHP 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 00 00 BRK 0 90 FB BCC *-3 28 PLP	Clobbers A, and S; requires dummy interrupt handler; and writes in stack
11 bytes
48 PHA 8C TXA 48 PHA A2 14 LDX #20 CA DEX D0 FD BNE *-1 68 PLA AA TAX 68 PLA	Clobbers Z&N; and writes in stack
EA ... NOP × 2 08 PHP 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3 28 PLP	Clobbers A; and writes in stack
12 bytes
EA NOP 08 PHP 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
30 bytes
68 PLA 48 PHA 68 ... PLA × 28	Clobbers A, S, and Z&N
34 bytes
68 PLA \ × 17 48 PHA /	Clobbers A, and Z&N
40 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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

120 cycles

5 bytes
A9 LDA #93 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V
7 bytes
EA ... NOP × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, Z&N, C, and V
48 PHA A9 LDA #86 20 xx xx JSR delay_a_25_clocks 68 PLA	Clobbers Z&N, C, and V; requires delay_a_25_clocks; and writes in stack
08 PHP A9 LDA #86 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
48 PHA 18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
08 PHP 18 CLC A9 E9 LDA #$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 10 LDX #16 EA NOP CA DEX D0 FC BNE *-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 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 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
12 bytes
EA NOP 68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 18 ... CLC × 2 90 00 BCC *+2 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
48 PHA 08 PHP 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; and writes in stack
13 bytes
08 PHP 24 24 BIT $24 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
30 bytes
68 ... PLA × 30	Clobbers A, S, and Z&N
35 bytes
68 PLA \ × 7 48 PHA / 36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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 LDA #94 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
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 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 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
24 24 BIT $24 48 PHA A9 E9 LDA #$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
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
08 PHP 48 PHA A9 LDA #80 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
18 CLC A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers S, Z&N, and C; and writes in stack
11 bytes
C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
12 bytes
EA NOP 48 PHA 8C TXA 48 PHA A2 14 LDX #20 CA DEX D0 FD BNE *-1 68 PLA AA TAX 68 PLA	Clobbers Z&N; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
31 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 28	Clobbers A, S, and Z&N
35 bytes
EA NOP 68 PLA \ × 17 48 PHA /	Clobbers A, and Z&N
41 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 5 76 36 ROR $36,X / 36 36... ROL $36,X× 9	Clobbers Z&N; and requires @zptemp
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

122 cycles

6 bytes
EA NOP A9 LDA #93 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
7 bytes
38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only EA NOP 10 FB BPL *-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 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 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 #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V
8 bytes
38 SEC A9 11 LDA #17 EA NOP E9 01 SBC #1 D0 FA BNE *-4	Clobbers A, Z&N, C, and V
68 PLA 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, S, and Z&N; and writes in stack
9 bytes
EA ... NOP × 2 48 PHA A9 E9 LDA #$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 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only EA NOP 10 FB BPL *-3 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
08 PHP 48 PHA A9 LDA #81 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 @rts14 90 FA BCC *-4 68 PLA	Clobbers Z&N, and C; requires @rts12, and @rts14; and writes in stack
11 bytes
08 PHP 48 PHA 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
31 bytes
EA NOP 68 ... PLA × 30	Clobbers A, S, and Z&N
35 bytes
68 PLA \ × 9 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
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

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
EA NOP A9 LDA #94 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
7 bytes
48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
38 SEC A9 18 LDA #24 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; and writes in stack
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
08 PHP 48 PHA A9 LDA #82 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
68 PLA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, S, Z&N, and C
11 bytes
EA ... NOP × 2 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
E6 xx INC @zptemp 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; requires @zptemp; and writes in stack
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
EA NOP 48 ... PHA × 2 A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers S, Z&N, and C; and writes in stack
12 bytes
EA NOP C5 C5 CMP $C5 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 18 CLC D0 FA BNE *-4 68 PLA	Clobbers Z&N, and C; and writes in stack
08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 20 xx xx JSR @rts15 18 CLC 10 F9 BPL *-5 68 PLA 28 PLP	Requires @rts12, and @rts15; and writes in stack
08 PHP 48 PHA 18 CLC A9 F4 LDA #244 ;hides 'NOP zp,X' EA NOP 69 01 ADC #1 D0 F9 BNE *-5 68 PLA 28 PLP	Requires support for unofficial opcodes; and writes in stack
13 bytes
48 PHA 98 TYA 48 PHA A0 0D LDY #13 A5 A5 LDA $A5 88 DEY D0 FB BNE *-3 68 PLA A8 TAY 68 PLA	Clobbers Z&N; and writes in stack
08 PHP 48 PHA 18 CLC A9 0A LDA #$0A ;hides 'ASL A' 08 PHP F6 F6 INC $F6,X 28 PLP 90 F9 BCC *-5 68 PLA 28 PLP	Requires @zptemp, and writable $00-$FF; and writes in stack
20 xx xx JSR @rts14 08 PHP 48 PHA A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP D0 FB BNE *-3 68 PLA 28 PLP	Requires @rts12, and @rts14; and writes in stack
48 ... PHA × 2 08 PHP 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Clobbers S; and writes in stack
14 bytes
EA ... NOP × 3 08 PHP 48 PHA 38 SEC A9 14 LDA #20 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
31 bytes
68 PLA 48 PHA 68 ... PLA × 29	Clobbers A, S, and Z&N
35 bytes
68 PLA \ × 8 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
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
E6 xx INC @zptemp 26 26 ROL $26 66 26 ROR $26 36 36 ROL $36,X \ × 9 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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

124 cycles

4 bytes
A2 E8 LDX #232 ;hides 'INX' D0 FD BNE *-1	Clobbers X, and Z&N
6 bytes
48 PHA A0 18 LDY #24 88 DEY D0 FD BNE *-1	Clobbers Y, S, and Z&N; and writes in stack
68 PLA A9 LDA #93 20 xx xx JSR delay_a_25_clocks	Clobbers A, S, Z&N, C, and V; and requires delay_a_25_clocks
7 bytes
A4 A4 LDY $A4 A0 18 LDY #24 88 DEY D0 FD BNE *-1	Clobbers Y, and Z&N
48 PHA A9 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
A5 A5 LDA $A5 A9 LDA #94 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
08 PHP A9 LDA #90 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
00 00 BRK 0 A9 E9 LDA #$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
EA NOP 38 SEC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only EA NOP 10 FB BPL *-3	Clobbers A, Z&N, C, V, and D
EA NOP 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
A9 0A LDA #$0A ;hides 'ASL A' 08 PHP 28 PLP 00 00 BRK 0 10 F9 BPL *-5	Clobbers A, Z&N, and C; requires dummy interrupt handler; and writes in stack
9 bytes
EA NOP 38 SEC A9 11 LDA #17 EA NOP E9 01 SBC #1 D0 FA BNE *-4	Clobbers A, Z&N, C, and V
08 PHP A2 0D LDX #13 ;hides 'ORA abs' A5 A5 LDA $A5 CA DEX D0 FA BNE *-4 28 PLP	Clobbers A, and X; and writes in stack
08 PHP A0 0D LDY #13 ;hides 'ORA abs' A5 A5 LDA $A5 88 DEY D0 FA BNE *-4 28 PLP	Clobbers A, and Y; and writes in stack
08 PHP A2 16 LDX #22 CA DEX D0 FD BNE *-1 F6 xx INC @zptemp,X 28 PLP	Clobbers X; requires @zptemp; 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 F6 F6 INC $F6,X A0 16 LDY #22 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 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 #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 28 PLP	Clobbers A, and S; and writes in stack
48 ... PHA × 2 08 PHP A2 16 LDX #22 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X, and S; and writes in stack
48 ... PHA × 2 08 PHP A0 16 LDY #22 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y, and S; and writes in stack
10 bytes
EA ... NOP × 3 48 PHA A9 E9 LDA #$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
EA NOP 08 PHP 18 CLC A9 69 LDA #$69 ;hides 'ADC #$F8' F8 SED ;first loop only EA NOP 10 FB BPL *-3 28 PLP	Clobbers A; and writes in stack
EA ... NOP × 3 08 PHP A2 16 LDX #22 CA DEX D0 FD BNE *-1 28 PLP	Clobbers X; and writes in stack
EA ... NOP × 3 08 PHP A0 16 LDY #22 88 DEY D0 FD BNE *-1 28 PLP	Clobbers Y; and writes in stack
11 bytes
48 PHA 8C TXA 48 PHA A2 15 LDX #21 CA DEX D0 FD BNE *-1 68 PLA AA TAX 68 PLA	Clobbers Z&N; and writes in stack
E6 xx INC @zptemp A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C; and requires @zptemp
12 bytes
EA NOP 08 PHP 48 PHA 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
EA NOP A5 A5 LDA $A5 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
31 bytes
68 ... PLA × 31	Clobbers A, S, and Z&N
36 bytes
36 36 ROL $36,X 76 36 ROR $36,X 68 PLA \ × 16 48 PHA /	Clobbers A, and Z&N
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

6 bytes
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
68 PLA A9 LDA #94 20 xx xx JSR delay_a_25_clocks	Clobbers A, S, Z&N, C, and V; and requires delay_a_25_clocks
7 bytes
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 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
EA ... NOP × 2 A9 LDA #94 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
08 PHP A9 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 18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
EA NOP 38 SEC A9 18 LDA #24 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
08 PHP 18 CLC A9 E9 LDA #$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
F6 F6 INC $F6,X A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C; and requires @zptemp, and writable $00-$FF
EA NOP 68 PLA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, S, Z&N, and C
12 bytes
EA ... NOP × 3 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
32 bytes
EA NOP 68 PLA 48 PHA 68 ... PLA × 29	Clobbers A, S, and Z&N
36 bytes
EA NOP 68 PLA \ × 8 48 PHA / A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 14 10 EE BPL *-16	Clobbers A, and Z&N
42 bytes
E6 xx INC @zptemp 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	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

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
7 bytes
48 PHA A9 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
68 PLA 48 PHA A9 LDA #92 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
08 PHP A9 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 #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers S, Z&N, C, and V; and writes in stack
EA NOP 68 ... PLA × 2 A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2	Clobbers A, S, Z&N, C, and V
48 PHA 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A, and S; and writes in stack
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
24 24 BIT $24 48 PHA A9 E9 LDA #$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
A5 A5 LDA $A5 38 SEC A9 18 LDA #24 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
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
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 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 0A LDA #$0A ;hides 'ASL A' 08 PHP 24 24 BIT $24 28 PLP D0 F9 BNE *-5 68 PLA	Clobbers Z&N, and C; and writes in stack
11 bytes
68 PLA 48 PHA A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 4 18 CLC D0 F8 BNE *-6	Clobbers A, Z&N, and C
12 bytes
EA NOP 48 PHA 8C TXA 48 PHA A2 15 LDX #21 CA DEX D0 FD BNE *-1 68 PLA AA TAX 68 PLA	Clobbers Z&N; and writes in stack
48 PHA 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	Clobbers S; requires dummy interrupt handler; and writes in stack
13 bytes
EA ... NOP × 2 08 PHP 48 PHA 38 SEC A9 15 LDA #21 E9 01 SBC #1 D0 FB BNE *-3 68 PLA 28 PLP	Writes in stack
32 bytes
EA NOP 68 ... PLA × 31	Clobbers A, S, and Z&N
36 bytes
68 PLA \ × 18 48 PHA /	Clobbers A, and Z&N
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
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 12 LDY #18 EA NOP 88 DEY D0 FC BNE *-2	Clobbers Y, and Z&N
7 bytes
48 PHA A9 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
68 PLA 48 PHA A9 LDA #93 20 xx xx JSR delay_a_25_clocks	Clobbers A, Z&N, C, and V; and requires delay_a_25_clocks
08 PHP A9 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
A9 0A LDA #$0A ;hides 'ASL A' EA NOP 08 PHP 28 PLP 18 CLC D0 F9 BNE *-5	Clobbers A, Z&N, and C; and writes in stack
08 PHP A2 11 LDX #17 EA NOP CA DEX D0 FC BNE *-2 28 PLP	Clobbers X; and writes in stack
08 PHP A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 28 PLP	Clobbers Y; and writes in stack
68 PLA 38 SEC A9 18 LDA #24 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, S, Z&N, C, and V
68 PLA 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A, S, and Z&N; and writes in stack
9 bytes
EA ... NOP × 2 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 68 PLA	Clobbers Z&N, C, and V; and writes in stack
EA ... NOP × 2 38 SEC A9 18 LDA #24 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
EA ... NOP × 2 08 PHP A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only B0 FC BCS *-2 28 PLP	Clobbers A; and writes in stack
08 PHP 48 PHA A9 LDA #86 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
10 bytes
08 PHP 48 PHA 18 CLC A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
A9 0A LDA #$0A ;hides 'ASL A' 18 ... CLC × 3 90 00 BCC *+2 18 CLC D0 F7 BNE *-7	Clobbers A, Z&N, and C
32 bytes
68 PLA 48 PHA 68 ... PLA × 30	Clobbers A, S, and Z&N
37 bytes
68 PLA \ × 8 48 PHA / 36 36 ROL $36,X 76 36 ROR $36,X A9 09 LDA #$09 ;hides 'ORA #$EA' EA NOP ;first loop only EA ... NOP × 12 10 F0 BPL *-14	Clobbers A, and Z&N
43 bytes
EA NOP E6 xx INC @zptemp 36 36 ROL $36,X \ × 10 76 36 ROR $36,X /	Clobbers Z&N; and requires @zptemp
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

128 cycles

7 bytes
38 SEC A9 19 LDA #25 E9 01 SBC #1 D0 FB BNE *-3	Clobbers A, Z&N, C, and V
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 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 LDA #94 20 xx xx JSR delay_a_25_clocks 28 PLP	Clobbers A; requires delay_a_25_clocks; and writes in stack
8 bytes
A2 14 LDX #20 ;hides 'NOP zp,X' 04 EA NOP $EA ;hides 'NOP' CA ... DEX × 2 D0 F9 BNE *-5	Clobbers X, and Z&N; and requires support for unofficial opcodes
A0 14 LDY #20 ;hides 'NOP zp,X' 04 EA NOP $EA ;hides 'NOP' 88 ... DEY × 2 D0 F9 BNE *-5	Clobbers Y, and Z&N; and requires support for unofficial opcodes
9 bytes
48 PHA A9 E9 LDA #$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
A2 0B LDX #11 F6 F6 INC $F6,X CA DEX D0 FB BNE *-3 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp, and writable $00-$FF
08 PHP 48 PHA A9 LDA #87 20 xx xx JSR delay_a_25_clocks 68 PLA 28 PLP	Requires delay_a_25_clocks; and writes in stack
A2 0B LDX #11 EA NOP 68 PLA CA DEX D0 FB BNE *-3 F6 xx INC @zptemp,X	Clobbers A, X, S, and Z&N; and requires @zptemp
10 bytes
A2 05 LDX #5 ;hides 'ORA zp' CA DEX ;first loop only A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 CA DEX D0 F7 BNE *-7	Clobbers A, X, Z&N, and C
A0 05 LDY #5 ;hides 'ORA zp' 88 DEY ;first loop only A9 0A LDA #$0A ;hides 'ASL A' 10 FD BPL *-1 88 DEY D0 F7 BNE *-7	Clobbers A, Y, Z&N, and C
A2 0B LDX #11 EA ... NOP × 3 CA DEX D0 FA BNE *-4 F6 xx INC @zptemp,X	Clobbers X, and Z&N; and requires @zptemp
A2 09 LDX #9 ;hides 'ORA #imm' FE B5 02 INC $02B5,X ;hides 'LDA $02,X' A5 A5 LDA $A5 CA DEX D0 F7 BNE *-7	Clobbers A, X, and Z&N; and requires writable $200-$2FF, and writable $300-$3FF
A0 09 LDY #9 ;hides 'ORA #imm' FE B5 02 INC $02B5,X ;hides 'LDA $02,X' A5 A5 LDA $A5 88 DEY D0 F7 BNE *-7	Clobbers A, Y, and Z&N; and requires writable $200-$2FF, and writable $300-$3FF
A2 09 LDX #9 ;hides 'ORA #imm' FE B5 03 INC $03B5,X ;hides 'LDA $03,X' A5 A5 LDA $A5 CA DEX D0 F7 BNE *-7	Clobbers A, X, and Z&N; and requires writable $300-$3FF, and writable $400-$4FF
A0 09 LDY #9 ;hides 'ORA #imm' FE B5 03 INC $03B5,X ;hides 'LDA $03,X' A5 A5 LDA $A5 88 DEY D0 F7 BNE *-7	Clobbers A, Y, and Z&N; and requires writable $300-$3FF, and writable $400-$4FF
A2 09 LDX #9 ;hides 'ORA #imm' FE B5 04 INC $04B5,X ;hides 'LDA $04,X' A5 A5 LDA $A5 CA DEX D0 F7 BNE *-7	Clobbers A, X, and Z&N; and requires writable $400-$4FF, and writable $500-$5FF
A0 09 LDY #9 ;hides 'ORA #imm' FE B5 04 INC $04B5,X ;hides 'LDA $04,X' A5 A5 LDA $A5 88 DEY D0 F7 BNE *-7	Clobbers A, Y, and Z&N; and requires writable $400-$4FF, and writable $500-$5FF
A2 09 LDX #9 ;hides 'ORA #imm' FE B5 05 INC $05B5,X ;hides 'LDA $05,X' A5 A5 LDA $A5 CA DEX D0 F7 BNE *-7	Clobbers A, X, and Z&N; and requires writable $500-$5FF, and writable $600-$6FF
A0 09 LDY #9 ;hides 'ORA #imm' FE B5 05 INC $05B5,X ;hides 'LDA $05,X' A5 A5 LDA $A5 88 DEY D0 F7 BNE *-7	Clobbers A, Y, and Z&N; and requires writable $500-$5FF, and writable $600-$6FF
A2 09 LDX #9 ;hides 'ORA #imm' FE B5 07 INC $07B5,X ;hides 'LDA $07,X' A5 A5 LDA $A5 CA DEX D0 F7 BNE *-7	Clobbers A, X, and Z&N; and requires writable $00-$FF, and writable $700-$7FF
A0 09 LDY #9 ;hides 'ORA #imm' FE B5 07 INC $07B5,X ;hides 'LDA $07,X' A5 A5 LDA $A5 88 DEY D0 F7 BNE *-7	Clobbers A, Y, and Z&N; and requires writable $00-$FF, and writable $700-$7FF
A2 09 LDX #9 ;hides 'ORA #imm' FE B5 06 INC $06B5,X ;hides 'LDA $06,X' A5 A5 LDA $A5 CA DEX D0 F7 BNE *-7	Clobbers A, X, and Z&N; and requires writable $600-$6FF, and writable $700-$7FF
A0 09 LDY #9 ;hides 'ORA #imm' FE B5 06 INC $06B5,X ;hides 'LDA $06,X' A5 A5 LDA $A5 88 DEY D0 F7 BNE *-7	Clobbers A, Y, and Z&N; and requires writable $600-$6FF, and writable $700-$7FF
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
11 bytes
08 PHP 24 24 BIT $24 48 PHA A9 E9 LDA #$E9 ;hides 'SBC #$0A' 0A ASL A ;first loop only D0 FC BNE *-2 68 PLA 28 PLP	Writes in stack
BA TSX A0 09 LDY #9 ;hides 'ORA #imm' A5 68 LDA $68 ;hides 'PLA' A5 A5 LDA $A5 88 DEY D0 F8 BNE *-6 9A TXS	Clobbers A, X, Y, and Z&N; and unsafe for interrupts
A2 05 LDX #5 ;hides 'ORA zp' B5 68 LDA $68,X ;hides 'PLA' 68 PLA \ × 2 48 PHA / CA DEX D0 F6 BNE *-8	Clobbers A, X, S, and Z&N
A0 05 LDY #5 ;hides 'ORA zp' B5 68 LDA $68,X ;hides 'PLA' 68 PLA \ × 2 48 PHA / 88 DEY D0 F6 BNE *-8	Clobbers A, Y, S, and Z&N
12 bytes
A2 05 LDX #5 ;hides 'ORA zp' AD EA EA LDA $EAEA ;hides two 'NOP's 68 PLA \ × 2 48 PHA / CA DEX D0 F5 BNE *-9	Clobbers A, X, and Z&N
A0 05 LDY #5 ;hides 'ORA zp' AD EA EA LDA $EAEA ;hides two 'NOP's 68 PLA \ × 2 48 PHA / 88 DEY D0 F5 BNE *-9	Clobbers A, Y, and Z&N
A2 01 LDX #1 EA NOP A0 11 LDY #17 EA NOP 88 DEY D0 FC BNE *-2 CA DEX D0 F6 BNE *-8	Clobbers X, Y, and Z&N
16 bytes
18 ... CLC × 2 A9 0A LDA #$0A ;hides 'ASL A' EA ... NOP × 9 18 CLC 10 F3 BPL *-11	Clobbers A, Z&N, and C
32 bytes
68 ... PLA × 32	Clobbers A, S, and Z&N
64 bytes
EA ... NOP × 64	No requirements

• From 128 cycles onwards, these tables quit considering RTI options.

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