Fixed cycle delay

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Revision as of 01:21, 14 March 2016 by Bisqwit (talk | contribs) (update)
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Delay code

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

All branch instructions assume that no page wrap occurs.

Explanations on the requirements:

  • @zp_temp means you have a zeropage address that you can write random data into.
  • @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, @rts15 means you know a memory address that contains a harmless 3-cycle instruction that fits your constraints (such as LDA $00), followed by RTS.
  • @A, @X, @Y are local labels.


2 cycles

1 bytes 
NOP
 Clobbers nothing, requires nothing


3 cycles

1 bytes 
PHA
 Clobbers S
2 bytes 
LDA $00
 Clobbers A, and Z&N 
BIT $00
 Clobbers Z&N, and V 
STA @zptemp
 Requires @zptemp 
NOP $00
 Requires support for unofficial opcodes
3 bytes 
JMP *+3
 Clobbers nothing, requires nothing


4 cycles

1 bytes 
PLA
 Clobbers A, S, and Z&N
2 bytes 
NOP
NOP
 Clobbers nothing, requires nothing


5 cycles

2 bytes 
NOP
PHA
 Clobbers S
3 bytes 
NOP
LDA $00
 Clobbers A, and Z&N 
NOP
BIT $00
 Clobbers Z&N, and V 
NOP
STA @zptemp
 Requires @zptemp 
NOP
NOP $00
 Requires support for unofficial opcodes
4 bytes 
NOP
JMP *+3
 Clobbers nothing, requires nothing


6 cycles

2 bytes 
PHA
PHA
 Clobbers S
3 bytes 
NOP
NOP
NOP
 Clobbers nothing, requires nothing


7 cycles

2 bytes 
PHP
PLP
 Clobbers nothing, requires nothing


8 cycles

2 bytes 
PLA
PLA
 Clobbers A, S, and Z&N
3 bytes 
TSX
PLA
TXS
 Clobbers A, X, and Z&N 
NOP
PHA
PHA
 Clobbers S
4 bytes 
NOP
NOP
NOP
NOP
 Clobbers nothing, requires nothing


9 cycles

3 bytes 
NOP
PHP
PLP
 Clobbers nothing, requires nothing


10 cycles

3 bytes 
PHA
PHP
PLP
 Clobbers S
4 bytes 
PHP
BIT $00
PLP
 Clobbers nothing, requires nothing


11 cycles

3 bytes 
PHA
PLA
PLA
 Clobbers A, S, and Z&N
4 bytes 
NOP
NOP
PHP
PLP
 Clobbers nothing, requires nothing


12 cycles

3 bytes 
JSR @rts12
 Requires @rts12 
PLA
PLA
PLA
 Clobbers A, S, and Z&N
4 bytes 
ROL $00,X
ROR $00,X
 Clobbers Z&N 
NOP
PHA
PHP
PLP
 Clobbers S
5 bytes 
NOP
PHP
BIT $00
PLP
 Clobbers nothing, requires nothing


13 cycles

4 bytes 
PHA
PHA
PHP
PLP
 Clobbers S
5 bytes 
NOP
NOP
NOP
PHP
PLP
 Clobbers nothing, requires nothing


14 cycles

3 bytes 
JSR @rts14
 Requires @rts14
4 bytes 
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


15 cycles

3 bytes 
JSR @rts15
 Requires @rts15
4 bytes 
PHA
JSR @rts12
 Clobbers S; and requires @rts12 
PHA
PLA
PLA
PLA
 Clobbers A, S, and Z&N
5 bytes 
LDA $00
JSR @rts12
 Clobbers A, and Z&N; and requires @rts12 
PHA
TSX
PLA
TXS
PLA
 Clobbers X, and Z&N 
PHP
TSX
PLA
TXS
PLP
 Clobbers A, and X 
BIT $00
JSR @rts12
 Clobbers Z&N, and V; and requires @rts12 
STA @zptemp
JSR @rts12
 Requires @zptemp, and @rts12 
NOP
PHA
PHA
PHP
PLP
 Clobbers S 
NOP $00
JSR @rts12
 Requires @rts12, and support for unofficial opcodes
6 bytes 
NOP
NOP
NOP
NOP
PHP
PLP
 Clobbers nothing, requires nothing


16 cycles

4 bytes 
NOP
JSR @rts14
 Requires @rts14 
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N
5 bytes 
NOP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


17 cycles

4 bytes 
NOP
JSR @rts15
 Requires @rts15 
PHA
JSR @rts14
 Clobbers S; and requires @rts14
5 bytes 
LDA $00
JSR @rts14
 Clobbers A, and Z&N; and requires @rts14 
BIT $00
JSR @rts14
 Clobbers Z&N, and V; and requires @rts14 
STA @zptemp
JSR @rts14
 Requires @zptemp, and @rts14 
PHA
PHP
PLP
PHP
PLP
 Clobbers S 
NOP $00
JSR @rts14
 Requires @rts14, and support for unofficial opcodes
6 bytes 
PHP
PLP
PHP
BIT $00
PLP
 Clobbers nothing, requires nothing


18 cycles

4 bytes 
PHA
JSR @rts15
 Clobbers S; and requires @rts15 
PLA
JSR @rts14
 Clobbers A, S, and Z&N; and requires @rts14
5 bytes 
LDA $00
JSR @rts15
 Clobbers A, and Z&N; and requires @rts15 
BIT $00
JSR @rts15
 Clobbers Z&N, and V; and requires @rts15 
NOP
NOP
JSR @rts14
 Requires @rts14 
STA @zptemp
JSR @rts15
 Requires @zptemp, and @rts15 
PHA
PHA
JSR @rts12
 Clobbers S; and requires @rts12 
NOP
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
NOP $00
JSR @rts15
 Requires @rts15, and support for unofficial opcodes
6 bytes 
NOP
NOP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


19 cycles

4 bytes 
PLA
JSR @rts15
 Clobbers A, S, and Z&N; and requires @rts15
5 bytes 
PHP
PLP
JSR @rts12
 Requires @rts12 
NOP
NOP
JSR @rts15
 Requires @rts15 
PHA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
NOP
PHA
JSR @rts14
 Clobbers S; and requires @rts14
6 bytes 
PHP
ROL $00,X
ROR $00,X
PLP
 Clobbers nothing, requires nothing


20 cycles

5 bytes 
NOP
PHA
JSR @rts15
 Clobbers S; and requires @rts15 
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
PHA
PHA
JSR @rts14
 Clobbers S; and requires @rts14
6 bytes 
NOP
LDA $00
JSR @rts15
 Clobbers A, and Z&N; and requires @rts15 
TSX
PLA
PLA
PLA
PLA
TXS
 Clobbers A, X, and Z&N 
NOP
BIT $00
JSR @rts15
 Clobbers Z&N, and V; and requires @rts15 
NOP
NOP
NOP
JSR @rts14
 Requires @rts14 
NOP
STA @zptemp
JSR @rts15
 Requires @zptemp, and @rts15 
PHA
PHA
PHP
PLP
PHP
PLP
 Clobbers S 
NOP
NOP $00
JSR @rts15
 Requires @rts15, and support for unofficial opcodes
7 bytes 
NOP
NOP
NOP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


21 cycles

5 bytes 
LDY #4
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #4
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
PHP
PLP
JSR @rts14
 Requires @rts14 
PHA
PHA
JSR @rts15
 Clobbers S; and requires @rts15
6 bytes 
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


22 cycles

5 bytes 
PHP
PLP
JSR @rts15
 Requires @rts15 
PLA
PLA
JSR @rts14
 Clobbers A, S, and Z&N; and requires @rts14
6 bytes 
LDY #3
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #3
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
PHA
PHP
PLP
JSR @rts12
 Clobbers S; and requires @rts12 
NOP
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
NOP
PHA
PHA
JSR @rts14
 Clobbers S; and requires @rts14
7 bytes 
PHP
BIT $00
PLP
JSR @rts12
 Requires @rts12 
PHP
PHA
TSX
PLA
TXS
PLA
PLP
 Clobbers X 
NOP
NOP
NOP
NOP
JSR @rts14
 Requires @rts14 
NOP
PHA
PHA
PHP
PLP
PHP
PLP
 Clobbers S 
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA44 ;hides 'NOP zp'
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
8 bytes 
NOP
NOP
NOP
NOP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


23 cycles

5 bytes 
PLA
PLA
JSR @rts15
 Clobbers A, S, and Z&N; and requires @rts15
6 bytes 
NOP
LDX #4
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #4
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
PHP
PLP
JSR @rts14
 Requires @rts14 
NOP
PHA
PHA
JSR @rts15
 Clobbers S; and requires @rts15 
PHA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N
7 bytes 
NOP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


24 cycles

6 bytes 
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
PHP
PLP
JSR @rts15
 Requires @rts15 
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
PHA
LDX #4
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #4
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
PHA
PHP
PLP
JSR @rts14
 Clobbers S; and requires @rts14
7 bytes 
NOP
LDX #3
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #3
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
PHP
BIT $00
PLP
JSR @rts14
 Requires @rts14 
PHA
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
.byte $0C,$E6,@zptemp ;NOP abs; hides 'INC @zptemp'
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires @zptemp, and support for unofficial opcodes
8 bytes 
PHP
PLP
PHP
PLP
PHP
BIT $00
PLP
 Clobbers nothing, requires nothing


25 cycles

6 bytes 
PHA
PHP
PLP
JSR @rts15
 Clobbers S; and requires @rts15 
LDY #3
@Y:
PHA
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
LDX #3
@X:
PHA
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
PLA
PLA
JSR @rts14
 Clobbers A, S, and Z&N; and requires @rts14
7 bytes 
PHP
BIT $00
PLP
JSR @rts15
 Requires @rts15 
LDY #2
@Y:
PHP
PLP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #2
@X:
PHP
PLP
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
PHP
PLP
JSR @rts14
 Requires @rts14 
PHA
PHA
PHP
PLP
JSR @rts12
 Clobbers S; and requires @rts12 
NOP
PHA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N
8 bytes 
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


26 cycles

5 bytes 
LDY #5
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #5
@X:
DEX
BNE @X
 Clobbers X, and Z&N
6 bytes 
JSR @rts12
JSR @rts14
 Requires @rts12, and @rts14 
PHA
PLA
PLA
JSR @rts15
 Clobbers A, S, and Z&N; and requires @rts15 
PLA
PLA
PLA
JSR @rts14
 Clobbers A, S, and Z&N; and requires @rts14
7 bytes 
NOP
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
NOP
PHP
PLP
JSR @rts15
 Requires @rts15 
ROL $00,X
ROR $00,X
JSR @rts14
 Clobbers Z&N; and requires @rts14 
NOP
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
NOP
PHA
PHP
PLP
JSR @rts14
 Clobbers S; and requires @rts14 
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $2808 ;hides 'PHP' and 'PLP'; reads from $2000
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
8 bytes 
PHP
PLP
PHP
ROL $00,X
ROR $00,X
PLP
 Clobbers nothing, requires nothing


27 cycles

6 bytes 
JSR @rts12
JSR @rts15
 Requires @rts12, and @rts15 
PLA
PLA
PLA
JSR @rts15
 Clobbers A, S, and Z&N; and requires @rts15
7 bytes 
ROL $00,X
ROR $00,X
JSR @rts15
 Clobbers Z&N; and requires @rts15 
PHA
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12 
NOP
PHA
PHP
PLP
JSR @rts15
 Clobbers S; and requires @rts15 
PHA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
NOP
LDX #3
@X:
PHA
DEX
BNE @X
 Clobbers X, S, and Z&N 
NOP
LDY #3
@Y:
PHA
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
PHA
PHA
PHP
PLP
JSR @rts14
 Clobbers S; and requires @rts14
8 bytes 
NOP
PHP
BIT $00
PLP
JSR @rts15
 Requires @rts15 
LDA $00
JSR @rts12
JSR @rts12
 Clobbers A, and Z&N; and requires @rts12 
PHA
TSX
PLA
PLA
PLA
PLA
TXS
PLA
 Clobbers X, and Z&N 
NOP
LDY #2
@Y:
PHP
PLP
DEY
BNE @Y
 Clobbers Y, and Z&N 
PHP
TSX
PLA
PLA
PLA
PLA
TXS
PLP
 Clobbers A, and X 
BIT $00
JSR @rts12
JSR @rts12
 Clobbers Z&N, and V; and requires @rts12 
NOP
NOP
NOP
PHP
PLP
JSR @rts14
 Requires @rts14 
STA @zptemp
JSR @rts12
JSR @rts12
 Requires @zptemp, and @rts12 
PHA
PHA
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
NOP $00
JSR @rts12
JSR @rts12
 Requires @rts12, and support for unofficial opcodes 
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EAEA ;hides two 'NOP's
NOP
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
9 bytes 
NOP
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


28 cycles

6 bytes 
NOP
LDX #5
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #5
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
JSR @rts14
JSR @rts14
 Requires @rts14
7 bytes 
PHP
LDX #4
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #4
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #5
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHA
PHA
PHP
PLP
JSR @rts15
 Clobbers S; and requires @rts15 
PLA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N
8 bytes 
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


29 cycles

6 bytes 
LDX #4
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #4
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
JSR @rts14
JSR @rts15
 Requires @rts14, and @rts15
7 bytes 
PHP
PLP
PHP
PLP
JSR @rts15
 Requires @rts15 
PHA
JSR @rts12
JSR @rts14
 Clobbers S; and requires @rts12, and @rts14 
PHA
PLA
PLA
PLA
JSR @rts14
 Clobbers A, S, and Z&N; and requires @rts14
8 bytes 
PHP
LDY #3
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #3
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
LDA $00
JSR @rts12
JSR @rts14
 Clobbers A, and Z&N; and requires @rts12, and @rts14 
BIT $00
JSR @rts12
JSR @rts14
 Clobbers Z&N, and V; and requires @rts12, and @rts14 
STA @zptemp
JSR @rts12
JSR @rts14
 Requires @zptemp, @rts12, and @rts14 
NOP
PHA
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12 
NOP
PHA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
NOP
PHA
PHA
PHP
PLP
JSR @rts14
 Clobbers S; and requires @rts14 
NOP $00
JSR @rts12
JSR @rts14
 Requires @rts12, @rts14, and support for unofficial opcodes
9 bytes 
PHP
PLP
PHP
BIT $00
PLP
JSR @rts12
 Requires @rts12 
NOP
NOP
NOP
NOP
PHP
PLP
JSR @rts14
 Requires @rts14 
NOP
PHA
PHA
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
PHP
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA44 ;hides 'NOP zp'
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA44 ;hides 'NOP zp'
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
10 bytes 
NOP
NOP
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


30 cycles

6 bytes 
JSR @rts15
JSR @rts15
 Requires @rts15 
PLA
LDX #5
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N 
PLA
LDY #5
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N
7 bytes 
NOP
NOP
LDY #5
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
NOP
LDX #5
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
JSR @rts14
JSR @rts14
 Requires @rts14
8 bytes 
NOP
PHP
LDY #4
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #4
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #5
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHA
PHA
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12 
NOP
PLA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N
9 bytes 
NOP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


31 cycles

5 bytes 
LDX #6
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #6
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
NOP
JSR @rts14
JSR @rts15
 Requires @rts14, and @rts15 
PLA
PLA
PLA
PLA
JSR @rts15
 Clobbers A, S, and Z&N; and requires @rts15 
PHA
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14
8 bytes 
PHP
PLP
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
PHP
PLP
PHP
PLP
JSR @rts15
 Requires @rts15 
SEC
LDA #4
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
LDA $00
JSR @rts14
JSR @rts14
 Clobbers A, and Z&N; and requires @rts14 
BIT $00
JSR @rts14
JSR @rts14
 Clobbers Z&N, and V; and requires @rts14 
STA @zptemp
JSR @rts14
JSR @rts14
 Requires @zptemp, and @rts14 
PHA
PLA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
PHA
PHP
LDY #4
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #4
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
NOP $00
JSR @rts14
JSR @rts14
 Requires @rts14, and support for unofficial opcodes
9 bytes 
NOP
PHP
LDX #3
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
NOP
PHP
LDY #3
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
JMP *+3
JSR @rts14
JSR @rts14
 Requires @rts14 
PHA
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
PHP
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
.byte $0C,$E6,@zptemp ;NOP abs; hides 'INC @zptemp'
SBC #1
BMI @A
PLP
 Clobbers A; and requires @zptemp, and support for unofficial opcodes 
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
.byte $0C,$E6,@zptemp ;NOP abs; hides 'INC @zptemp'
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires @zptemp, and support for unofficial opcodes
10 bytes 
PHP
PLP
PHP
PLP
PHP
PLP
PHP
BIT $00
PLP
 Clobbers nothing, requires nothing


32 cycles

7 bytes 
NOP
JSR @rts15
JSR @rts15
 Requires @rts15 
PHA
LDX #4
@X:
NOP
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #4
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
PLA
JSR @rts14
JSR @rts14
 Clobbers A, S, and Z&N; and requires @rts14
8 bytes 
NOP
NOP
NOP
LDY #5
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
NOP
NOP
LDX #5
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
JSR @rts14
JSR @rts14
 Requires @rts14 
PLA
PLA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N
9 bytes 
TYA
PHA
LDY #4
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
PHP
LDX #2
@X:
PHP
PLP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #2
@Y:
PHP
PLP
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHA
PHA
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12
10 bytes 
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


33 cycles

6 bytes 
NOP
LDY #6
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
LDX #6
@X:
DEX
BNE @X
 Clobbers X, and Z&N
7 bytes 
PHP
LDY #5
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #5
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #6
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHA
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15
8 bytes 
LDA $00
JSR @rts15
JSR @rts15
 Clobbers A, and Z&N; and requires @rts15 
BIT $00
JSR @rts15
JSR @rts15
 Clobbers Z&N, and V; and requires @rts15 
PHP
PLP
JSR @rts12
JSR @rts14
 Requires @rts12, and @rts14 
NOP
NOP
JSR @rts14
JSR @rts15
 Requires @rts14, and @rts15 
STA @zptemp
JSR @rts15
JSR @rts15
 Requires @zptemp, and @rts15 
NOP
PHA
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14 
NOP $00
JSR @rts15
JSR @rts15
 Requires @rts15, and support for unofficial opcodes
9 bytes 
NOP
PHP
PLP
JSR @rts12
JSR @rts12
 Requires @rts12 
JMP *+3
JSR @rts15
JSR @rts15
 Requires @rts15 
JSR @rts14
PHP
ROL $00,X
ROR $00,X
PLP
 Requires @rts14 
NOP
PHA
PLA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
PHP
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $2808 ;hides 'PHP' and 'PLP'; reads from $2000
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $2808 ;hides 'PHP' and 'PLP'; reads from $2000
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
10 bytes 
PHP
PLP
PHP
PLP
PHP
ROL $00,X
ROR $00,X
PLP
 Clobbers nothing, requires nothing


34 cycles

6 bytes 
PHA
LDX #6
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #6
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
LDA $00
LDX #6
@X:
DEX
BNE @X
 Clobbers A, X, and Z&N 
LDA $00
LDY #6
@Y:
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
BIT $00
LDX #6
@X:
DEX
BNE @X
 Clobbers X, Z&N, and V 
BIT $00
LDY #6
@Y:
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
STA @zptemp
LDX #6
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
STA @zptemp
LDY #6
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
PLA
JSR @rts15
JSR @rts15
 Clobbers A, S, and Z&N; and requires @rts15 
NOP $00
LDY #6
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes 
NOP $00
LDX #6
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes
8 bytes 
NOP
NOP
JSR @rts15
JSR @rts15
 Requires @rts15 
JMP *+3
LDY #6
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
JMP *+3
LDX #6
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
PHA
PHA
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14
9 bytes 
NOP
NOP
NOP
JSR @rts14
JSR @rts14
 Requires @rts14 
PHA
PHP
PLP
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12 
NOP
PLA
PLA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
PHA
PHA
PHP
LDX #4
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHA
PHP
LDY #4
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA ;hides 'NOP'
PHP
PLP
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
10 bytes 
PHP
BIT $00
PLP
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
TYA
PHA
LDY #4
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
PHP
LDY #2
@Y:
PHP
PLP
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
PHA
TSX
PLA
PLA
PLA
PLA
TXS
PLA
PLP
 Clobbers X 
PHA
PHA
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
PHP
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EAEA ;hides two 'NOP's
NOP
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EAEA ;hides two 'NOP's
NOP
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
11 bytes 
NOP
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


35 cycles

6 bytes 
PLA
LDY #6
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N 
PLA
LDX #6
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N
7 bytes 
NOP
NOP
LDX #6
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
LDY #6
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
NOP
PHP
LDY #5
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #5
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #6
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHP
PLP
JSR @rts14
JSR @rts14
 Requires @rts14 
NOP
PHA
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15
9 bytes 
PHP
SEC
LDA #5
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #5
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
NOP
BIT $00
JSR @rts15
JSR @rts15
 Clobbers Z&N, and V; and requires @rts15 
NOP
STA @zptemp
JSR @rts15
JSR @rts15
 Requires @zptemp, and @rts15 
NOP
NOP $00
JSR @rts15
JSR @rts15
 Requires @rts15, and support for unofficial opcodes
10 bytes 
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


36 cycles

5 bytes 
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #7
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHP
LDX #4
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #4
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
PLP
JSR @rts14
JSR @rts15
 Requires @rts14, and @rts15 
PHA
PHA
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15 
PHA
SEC
LDA #6
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C 
PLA
PLA
JSR @rts14
JSR @rts14
 Clobbers A, S, and Z&N; and requires @rts14
9 bytes 
JSR @rts12
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
NOP
NOP
JSR @rts15
JSR @rts15
 Requires @rts15 
LDA $00
SEC
LDA #6
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PLA
PLA
PLA
PLA
PLA
PLA
PLA
PLA
PLA
 Clobbers A, S, and Z&N 
NOP
PHA
PHA
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14
10 bytes 
NOP
NOP
NOP
NOP
JSR @rts14
JSR @rts14
 Requires @rts14 
PHA
PHP
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $2808 ;hides 'PHP' and 'PLP'; reads from $2000
SBC #1
BMI @A
PLP
 Clobbers A, and S; and requires support for unofficial opcodes 
PHA
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $2808 ;hides 'PHP' and 'PLP'; reads from $2000
SBC #1
BMI @A
PLA
 Clobbers S, Z&N, and C; and requires support for unofficial opcodes
11 bytes 
TYA
PHA
LDY #2
@Y:
PHP
PLP
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
PHA
PHA
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
PHP
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA44 ;hides 'NOP zp'
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
12 bytes 
NOP
NOP
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


37 cycles

6 bytes 
LDY #4
@Y:
PLA
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N 
LDX #4
@X:
PLA
DEX
BNE @X
 Clobbers A, X, S, and Z&N
7 bytes 
LDX #3
@X:
PHP
PLP
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #3
@Y:
PHP
PLP
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
PHP
PLP
JSR @rts15
JSR @rts15
 Requires @rts15 
PLA
SEC
LDA #6
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TYA
PHA
LDY #5
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
PHP
LDX #5
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
NOP
PHP
LDY #5
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
PLP
JSR @rts14
JSR @rts14
 Requires @rts14
10 bytes 
NOP
PHP
SEC
LDA #5
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #5
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
PHA
PHA
PHP
PLP
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12
11 bytes 
NOP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


38 cycles

6 bytes 
NOP
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
LDX #7
@X:
DEX
BNE @X
 Clobbers X, and Z&N
7 bytes 
PHP
LDY #6
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #6
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #7
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
8 bytes 
PLA
PLA
JSR @rts15
JSR @rts15
 Clobbers A, S, and Z&N; and requires @rts15
9 bytes 
JSR @rts12
JSR @rts12
JSR @rts14
 Requires @rts12, and @rts14 
NOP
PHP
PLP
JSR @rts14
JSR @rts15
 Requires @rts14, and @rts15 
NOP
PHA
PHA
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15 
PHA
PHP
PLP
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14
10 bytes 
NOP
JSR @rts12
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
NOP
NOP
NOP
JSR @rts15
JSR @rts15
 Requires @rts15 
PHP
SEC
LDA #4
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #4
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
PHP
BIT $00
PLP
JSR @rts14
JSR @rts14
 Requires @rts14
11 bytes 
PHA
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
PHP
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
.byte $0C,$E6,@zptemp ;NOP abs; hides 'INC @zptemp'
SBC #1
BMI @A
PLA
PLP
 Requires @zptemp, and support for unofficial opcodes
12 bytes 
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
BIT $00
PLP
 Clobbers nothing, requires nothing


39 cycles

6 bytes 
PHA
LDX #7
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
LDA $00
LDY #7
@Y:
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
LDA $00
LDX #7
@X:
DEX
BNE @X
 Clobbers A, X, and Z&N 
BIT $00
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
BIT $00
LDX #7
@X:
DEX
BNE @X
 Clobbers X, Z&N, and V 
STA @zptemp
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
STA @zptemp
LDX #7
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
NOP $00
LDX #7
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes 
NOP $00
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes
8 bytes 
JMP *+3
LDX #7
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
JMP *+3
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
9 bytes 
NOP
PHP
PLP
JSR @rts15
JSR @rts15
 Requires @rts15 
SEC
LDA #3
@A:
PHP
PLP
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHA
PHP
LDY #4
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #4
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PLA
PLA
JSR @rts14
JSR @rts14
 Clobbers A, S, and Z&N; and requires @rts14
10 bytes 
NOP
TYA
PHA
LDY #5
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
NOP
PHP
LDX #5
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
NOP
NOP
PHP
LDY #5
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
NOP
PHP
PLP
JSR @rts14
JSR @rts14
 Requires @rts14 
PHA
JSR @rts12
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12
11 bytes 
PHA
TYA
PHA
LDY #4
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #5
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
STA @zptemp
JSR @rts12
JSR @rts12
JSR @rts12
 Requires @zptemp, and @rts12 
NOP $00
JSR @rts12
JSR @rts12
JSR @rts12
 Requires @rts12, and support for unofficial opcodes
12 bytes 
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


40 cycles

6 bytes 
PLA
LDX #7
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N 
PLA
LDY #7
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N
7 bytes 
NOP
NOP
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
NOP
LDX #7
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #6
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #6
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #7
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #6
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
JSR @rts12
JSR @rts14
JSR @rts14
 Requires @rts12, and @rts14 
PHA
PHP
PLP
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15
10 bytes 
PHP
BIT $00
PLP
JSR @rts15
JSR @rts15
 Requires @rts15 
ROL $00,X
ROR $00,X
JSR @rts14
JSR @rts14
 Clobbers Z&N; and requires @rts14 
NOP
PHA
PHP
PLP
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14
11 bytes 
NOP
NOP
JSR @rts12
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
PHP
BIT $00
PLP
JSR @rts14
JSR @rts14
 Requires @rts14 
PHP
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $2808 ;hides 'PHP' and 'PLP'; reads from $2000
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
12 bytes 
PHP
PLP
PHP
PLP
PHP
PLP
PHP
ROL $00,X
ROR $00,X
PLP
 Clobbers nothing, requires nothing


41 cycles

5 bytes 
LDX #8
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #8
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
PHA
PHP
LDX #6
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHP
LDY #6
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
BIT $00
LDY #6
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
BIT $00
LDX #6
@X:
DEX
BNE @X
PLP
 Clobbers X 
LDA $00
SEC
LDA #7
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
JSR @rts12
JSR @rts14
JSR @rts15
 Requires @rts12, @rts14, and @rts15 
PHA
PLA
PLA
JSR @rts15
JSR @rts15
 Clobbers A, S, and Z&N; and requires @rts15
10 bytes 
NOP
NOP
PHP
PLP
JSR @rts15
JSR @rts15
 Requires @rts15 
PLA
TYA
PHA
LDY #5
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N 
PHA
PHA
PHP
PLP
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14
11 bytes 
NOP
NOP
TYA
PHA
LDY #5
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
NOP
PHP
PLP
JSR @rts14
JSR @rts14
 Requires @rts14 
NOP
PHA
JSR @rts12
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12 
PHA
PHP
SEC
LDA #4
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #4
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C 
PHP
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA ;hides 'NOP'
PHP
PLP
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA ;hides 'NOP'
PHP
PLP
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
12 bytes 
PHP
PLP
PHP
BIT $00
PLP
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
PHA
TYA
PHA
LDY #4
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
NOP
PHP
SEC
LDA #5
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
PHA
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
PHP
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EAEA ;hides two 'NOP's
NOP
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
13 bytes 
NOP
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


42 cycles

7 bytes 
PHA
PHA
LDX #7
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
PHA
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
8 bytes 
NOP
NOP
NOP
LDX #7
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
NOP
LDY #7
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
PLA
SEC
LDA #7
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
JSR @rts12
JSR @rts15
JSR @rts15
 Requires @rts12, and @rts15 
TYA
PHA
LDY #6
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
PHP
LDX #6
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
NOP
PHP
LDY #6
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14
10 bytes 
ROL $00,X
ROR $00,X
JSR @rts15
JSR @rts15
 Clobbers Z&N; and requires @rts15 
NOP
PHP
SEC
LDA #6
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
NOP
PHA
PHP
PLP
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15
11 bytes 
PHP
PHA
SEC
LDA #5
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


43 cycles

6 bytes 
LDX #6
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #6
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDX #7
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #7
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #8
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
JSR @rts14
JSR @rts14
JSR @rts15
 Requires @rts14, and @rts15
10 bytes 
PHA
PHA
PHP
PLP
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15 
PHA
PHP
SEC
LDA #6
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C 
PHA
JSR @rts12
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts12, and @rts14
11 bytes 
PHP
PLP
JSR @rts12
JSR @rts12
JSR @rts12
 Requires @rts12 
NOP
NOP
NOP
PHP
PLP
JSR @rts15
JSR @rts15
 Requires @rts15 
PHP
LDA $00
SEC
LDA #6
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
NOP
PHA
PHA
PHP
PLP
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14
12 bytes 
NOP
NOP
NOP
NOP
PHP
PLP
JSR @rts14
JSR @rts14
 Requires @rts14 
PHA
PHP
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $2808 ;hides 'PHP' and 'PLP'; reads from $2000
SBC #1
BMI @A
PLA
PLP
 Clobbers S; and requires support for unofficial opcodes
13 bytes 
PHA
TYA
PHA
LDY #2
@Y:
PHP
PLP
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
PHA
PHA
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers S 
PHP
PLP
PHP
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA44 ;hides 'NOP zp'
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
14 bytes 
NOP
NOP
NOP
NOP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
PHP
PLP
 Clobbers nothing, requires nothing


44 cycles

6 bytes 
PHA
LDY #8
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
PHA
LDX #8
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N
7 bytes 
LDA $00
LDY #8
@Y:
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
LDA $00
LDX #8
@X:
DEX
BNE @X
 Clobbers A, X, and Z&N 
BIT $00
LDY #8
@Y:
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
BIT $00
LDX #8
@X:
DEX
BNE @X
 Clobbers X, Z&N, and V 
STA @zptemp
LDY #8
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
STA @zptemp
LDX #8
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
NOP $00
LDY #8
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes 
NOP $00
LDX #8
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes
8 bytes 
JMP *+3
LDY #8
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
JMP *+3
LDX #8
@X:
DEX
BNE @X
 Clobbers X, and Z&N
9 bytes 
PHP
LDY #3
@Y:
PHP
PLP
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #3
@X:
PHP
PLP
DEX
BNE @X
PLP
 Clobbers X 
JSR @rts14
JSR @rts15
JSR @rts15
 Requires @rts14, and @rts15 
NOP
PLA
SEC
LDA #7
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
10 bytes 
PHP
PLP
PHP
PLP
JSR @rts15
JSR @rts15
 Requires @rts15 
NOP
TYA
PHA
LDY #6
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14
11 bytes 
PHA
TYA
PHA
LDY #5
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #6
@A:
SBC #1
BNE @A
PLP
 Clobbers A
12 bytes 
NOP
PHP
PHA
SEC
LDA #5
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


45 cycles

6 bytes 
PLA
LDY #8
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N 
PLA
LDX #8
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N
7 bytes 
NOP
LDY #6
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
LDX #6
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #7
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #7
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #6
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @rts15 
PHP
SEC
LDA #7
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
10 bytes 
PHA
JSR @rts14
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14
11 bytes 
PHP
PLP
JSR @rts12
JSR @rts12
JSR @rts14
 Requires @rts12, and @rts14 
BIT $00
JSR @rts14
JSR @rts14
JSR @rts14
 Clobbers Z&N, and V; and requires @rts14 
STA @zptemp
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @zptemp, and @rts14 
NOP $00
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14, and support for unofficial opcodes
12 bytes 
PHP
PHA
SEC
LDA #4
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


46 cycles

5 bytes 
LDX #9
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #9
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
PHA
PHP
LDX #7
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHP
LDY #7
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
SEC
LDA #8
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
BIT $00
LDX #7
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
BIT $00
LDY #7
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
LDA $00
SEC
LDA #8
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
NOP
JSR @rts14
JSR @rts15
JSR @rts15
 Requires @rts14, and @rts15 
PLA
TYA
PHA
LDY #6
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N
11 bytes 
NOP
PHP
PLP
PHP
PLP
JSR @rts15
JSR @rts15
 Requires @rts15 
PHP
SEC
LDA #3
@A:
PHP
PLP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #3
@A:
PHP
PLP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
NOP
NOP
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14
12 bytes 
NOP
PHA
TYA
PHA
LDY #5
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
PHA
PHP
PLP
JSR @rts12
JSR @rts12
JSR @rts12
 Clobbers S; and requires @rts12
13 bytes 
NOP
NOP
PHP
PHA
SEC
LDA #5
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


47 cycles

7 bytes 
PHA
PHA
LDX #8
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
PHA
LDY #8
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
8 bytes 
NOP
NOP
LDX #6
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
LDY #6
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
PLA
SEC
LDA #8
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TYA
PHA
LDY #7
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
PHP
LDX #7
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
NOP
PHP
LDY #7
@Y:
DEY
BNE @Y
PLP
 Clobbers Y
10 bytes 
NOP
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @rts15 
NOP
PHP
SEC
LDA #7
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


48 cycles

6 bytes 
NOP
LDX #9
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #9
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDX #8
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #8
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #9
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
JSR @rts15
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15 
PHA
PHP
SEC
LDA #7
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
PHP
LDA $00
SEC
LDA #7
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
BIT $00
JSR @rts15
JSR @rts15
JSR @rts15
 Clobbers Z&N, and V; and requires @rts15 
NOP
NOP
JSR @rts14
JSR @rts15
JSR @rts15
 Requires @rts14, and @rts15 
STA @zptemp
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @zptemp, and @rts15 
PHA
PHA
JSR @rts14
JSR @rts14
JSR @rts14
 Clobbers S; and requires @rts14 
NOP $00
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @rts15, and support for unofficial opcodes
12 bytes 
JSR @rts12
JSR @rts12
JSR @rts12
JSR @rts12
 Requires @rts12 
JMP *+3
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @rts15 
NOP
NOP
NOP
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14
13 bytes 
NOP
NOP
PHA
TYA
PHA
LDY #5
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
PHA
PHP
PHA
SEC
LDA #4
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers S 
PHP
PHA
SEC
LDA #130
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA ;hides 'NOP'
PHP
PLP
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
14 bytes 
NOP
NOP
NOP
PHP
PHA
SEC
LDA #5
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


49 cycles

6 bytes 
LDY #6
@Y:
PHA
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
LDX #6
@X:
PHA
DEX
BNE @X
 Clobbers X, S, and Z&N
7 bytes 
LDY #4
@Y:
PHP
PLP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #4
@X:
PHP
PLP
DEX
BNE @X
 Clobbers X, and Z&N
9 bytes 
PHA
PHA
PHP
LDX #7
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHA
PHP
LDY #7
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
NOP
PLA
SEC
LDA #8
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
10 bytes 
NOP
TYA
PHA
LDY #7
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
NOP
PHP
LDY #7
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
NOP
NOP
PHP
LDX #7
@X:
DEX
BNE @X
PLP
 Clobbers X
11 bytes 
NOP
NOP
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @rts15 
PHA
TYA
PHA
LDY #6
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #7
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHP
PLP
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14
12 bytes 
NOP
PHP
PHA
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


50 cycles

6 bytes 
LDX #7
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #7
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
PHP
LDX #6
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #6
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
SEC
LDA #9
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #8
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #8
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PLP
JSR @rts14
JSR @rts14
JSR @rts15
 Requires @rts14, and @rts15 
NOP
PHA
JSR @rts15
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15
12 bytes 
NOP
BIT $00
JSR @rts15
JSR @rts15
JSR @rts15
 Clobbers Z&N, and V; and requires @rts15 
JSR @rts12
JSR @rts12
JSR @rts12
JSR @rts14
 Requires @rts12, and @rts14 
NOP
STA @zptemp
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @zptemp, and @rts15 
PHA
PHP
PHA
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S 
NOP
NOP $00
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @rts15, and support for unofficial opcodes
13 bytes 
PHP
PHA
LDA $00
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


51 cycles

5 bytes 
LDY #10
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #10
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHA
PHP
LDX #8
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHP
LDY #8
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
SEC
LDA #6
@A:
PHA
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
BIT $00
LDY #8
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
BIT $00
LDX #8
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #4
@A:
PHP
PLP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PLA
TYA
PHA
LDY #7
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N
11 bytes 
NOP
NOP
TYA
PHA
LDY #7
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
PHP
PLP
JSR @rts14
JSR @rts15
JSR @rts15
 Requires @rts14, and @rts15 
PHA
PHA
JSR @rts15
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15 
PHA
PHA
PHP
SEC
LDA #7
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
12 bytes 
NOP
NOP
NOP
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @rts15 
NOP
PHA
TYA
PHA
LDY #6
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
NOP
PHP
SEC
LDA #7
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHP
PLP
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14
13 bytes 
NOP
NOP
PHP
PHA
SEC
LDA #6
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


52 cycles

7 bytes 
NOP
LDY #7
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
LDX #7
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
SEC
LDA #7
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
TYA
PHA
LDY #8
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
PHP
LDY #6
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #6
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X
10 bytes 
PHP
SEC
LDA #6
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #6
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


53 cycles

6 bytes 
NOP
LDX #10
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #10
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDX #9
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #9
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #10
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
PHP
SEC
LDA #8
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #8
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
PHP
LDA $00
SEC
LDA #8
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #8
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
NOP
PHP
PLP
JSR @rts14
JSR @rts15
JSR @rts15
 Requires @rts14, and @rts15 
NOP
PHA
PHA
JSR @rts15
JSR @rts15
JSR @rts15
 Clobbers S; and requires @rts15
13 bytes 
PHP
PHA
SEC
LDA #3
@A:
PHP
PLP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


54 cycles

6 bytes 
PHA
LDX #10
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #10
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
LDA $00
LDX #10
@X:
DEX
BNE @X
 Clobbers A, X, and Z&N 
LDA $00
LDY #10
@Y:
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
BIT $00
LDX #10
@X:
DEX
BNE @X
 Clobbers X, Z&N, and V 
BIT $00
LDY #10
@Y:
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
STA @zptemp
LDX #10
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
STA @zptemp
LDY #10
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
NOP $00
LDX #10
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes 
NOP $00
LDY #10
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes
8 bytes 
JMP *+3
LDY #10
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
JMP *+3
LDX #10
@X:
DEX
BNE @X
 Clobbers X, and Z&N
9 bytes 
NOP
SEC
LDA #7
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHA
PHA
PHP
LDY #8
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHA
PHP
LDX #8
@X:
DEX
BNE @X
PLP
 Clobbers X, and S
10 bytes 
TYA
PHA
LDY #6
@Y:
NOP
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
PHP
LDX #6
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
NOP
NOP
PHP
LDY #6
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y
11 bytes 
PHA
TYA
PHA
LDY #7
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
PHP
SEC
LDA #6
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A
12 bytes 
NOP
PHP
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


55 cycles

6 bytes 
LDY #6
@Y:
PLA
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N 
LDX #6
@X:
PLA
DEX
BNE @X
 Clobbers A, X, S, and Z&N
7 bytes 
LDY #6
@Y:
NOP
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #6
@X:
NOP
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #9
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #9
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #10
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #9
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #9
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
JSR @rts12
JSR @rts14
JSR @rts14
JSR @rts15
 Requires @rts12, @rts14, and @rts15 
PHA
PHP
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
13 bytes 
PHP
PHA
LDA $00
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


56 cycles

5 bytes 
LDY #11
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #11
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHA
PHP
LDY #9
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #9
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
SEC
LDA #10
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
LDX #4
@X:
PHP
PLP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #4
@Y:
PHP
PLP
DEY
BNE @Y
PLP
 Clobbers Y 
LDA $00
SEC
LDA #10
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PLA
TYA
PHA
LDY #8
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N
11 bytes 
NOP
TYA
PHA
LDY #6
@Y:
NOP
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
PHA
PHA
PHP
SEC
LDA #8
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
PHA
SEC
LDA #8
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
12 bytes 
NOP
PHA
TYA
PHA
LDY #7
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #6
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
JSR @rts14
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14
13 bytes 
NOP
NOP
PHP
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


57 cycles

6 bytes 
LDX #8
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #8
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
SEC
LDA #136
@A = * - 1
; ^ Hides DEY
SBC #1
BMI @A
 Clobbers A, Z&N, and C
8 bytes 
PHP
LDY #7
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #7
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X
9 bytes 
TYA
PHA
LDY #9
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N
10 bytes 
NOP
PHP
SEC
LDA #9
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #9
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #8
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


58 cycles

6 bytes 
NOP
LDX #11
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #11
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDY #10
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #10
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #11
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
PHP
SEC
LDA #9
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #9
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
PHP
SEC
LDA #4
@A:
PHP
PLP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #4
@A:
PHP
PLP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
JSR @rts14
JSR @rts14
JSR @rts15
JSR @rts15
 Requires @rts14, and @rts15
13 bytes 
NOP
NOP
PHA
TYA
PHA
LDY #7
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
JSR @rts14
JSR @rts14
JSR @rts14
JSR @rts14
 Requires @rts14 
PHA
PHA
PHP
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
14 bytes 
NOP
NOP
NOP
PHP
PHA
SEC
LDA #7
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


59 cycles

6 bytes 
PHA
LDX #11
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #11
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
NOP
LDY #8
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
LDX #8
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
SEC
LDA #8
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
NOP
PHP
LDY #7
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #7
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X
10 bytes 
PHP
SEC
LDA #7
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #7
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHA
TYA
PHA
LDY #8
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N
12 bytes 
PHP
PHA
SEC
LDA #6
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


60 cycles

6 bytes 
PLA
LDX #11
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N 
PLA
LDY #11
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N
7 bytes 
NOP
NOP
LDY #11
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
NOP
LDX #11
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #10
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #10
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #11
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #10
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #10
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
JSR @rts15
JSR @rts15
JSR @rts15
JSR @rts15
 Requires @rts15 
PHA
PHP
PHA
SEC
LDA #8
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
13 bytes 
PHP
PHA
LDA $00
SEC
LDA #8
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


61 cycles

5 bytes 
LDY #12
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #12
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHA
PHP
LDY #10
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #10
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
SEC
LDA #11
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
BIT $00
LDY #10
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
BIT $00
LDX #10
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #8
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
TXA
PHA
LDX #7
@X:
NOP
DEX
BNE @X
PLA
TAX
 Clobbers A, and Z&N
11 bytes 
NOP
PHP
SEC
LDA #7
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #7
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
TYA
PHA
LDY #6
@Y:
NOP
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N
13 bytes 
NOP
PHP
PHA
SEC
LDA #6
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


62 cycles

7 bytes 
PHA
PHA
LDY #11
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
PHA
PHA
LDX #11
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N
8 bytes 
NOP
NOP
NOP
LDX #11
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
NOP
LDY #11
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
PLA
SEC
LDA #11
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TXA
PHA
LDX #10
@X:
DEX
BNE @X
PLA
TAX
 Clobbers A, and Z&N 
PHP
LDX #6
@X:
NOP
NOP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #6
@Y:
NOP
NOP
DEY
BNE @Y
PLP
 Clobbers Y
10 bytes 
NOP
PHP
SEC
LDA #10
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #10
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #9
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


63 cycles

6 bytes 
NOP
LDX #12
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #12
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDX #11
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #11
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #12
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
PHP
SEC
LDA #10
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #10
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
PHP
LDA $00
SEC
LDA #10
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #10
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
13 bytes 
NOP
PHA
TYA
PHA
LDY #6
@Y:
NOP
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
PHA
PHA
PHP
PHA
SEC
LDA #8
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
14 bytes 
NOP
NOP
PHP
PHA
SEC
LDA #6
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


64 cycles

6 bytes 
LDY #9
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #9
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHP
LDY #8
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #8
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X
9 bytes 
PHP
SEC
LDA #136
@A = * - 1
; ^ Hides DEY
SBC #1
BMI @A
PLP
 Clobbers A 
PHA
SEC
LDA #136
@A = * - 1
; ^ Hides DEY
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHA
TYA
PHA
LDY #9
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N
12 bytes 
NOP
PHP
PHA
SEC
LDA #9
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


65 cycles

6 bytes 
LDX #8
@X:
PHA
DEX
BNE @X
 Clobbers X, S, and Z&N 
LDY #8
@Y:
PHA
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
NOP
NOP
LDY #12
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
NOP
LDX #12
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #11
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #11
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #12
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #11
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #11
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
PHP
PHA
SEC
LDA #9
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
13 bytes 
PHP
PHA
SEC
LDA #4
@A:
PHP
PLP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


66 cycles

5 bytes 
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #13
@X:
DEX
BNE @X
 Clobbers X, and Z&N
7 bytes 
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
8 bytes 
SEC
LDA #9
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHA
PHP
LDY #11
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #11
@X:
DEX
BNE @X
PLP
 Clobbers X, and S
9 bytes 
NOP
PHP
LDY #8
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #8
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X
10 bytes 
PHP
SEC
LDA #8
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #8
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHP
PHA
SEC
LDA #7
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


67 cycles

7 bytes 
LDY #6
@Y:
PHA
PHA
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
LDX #6
@X:
PHA
PHA
DEX
BNE @X
 Clobbers X, S, and Z&N
8 bytes 
LDY #6
@Y:
NOP
NOP
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #6
@X:
NOP
NOP
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
SEC
LDA #8
@A:
PHA
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TYA
PHA
LDY #11
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
PHP
LDX #11
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
NOP
PHP
LDY #11
@Y:
DEY
BNE @Y
PLP
 Clobbers Y
10 bytes 
NOP
PHP
SEC
LDA #11
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #11
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #10
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


68 cycles

6 bytes 
NOP
LDX #13
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDX #12
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #12
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #13
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
TXA
PHA
LDX #8
@X:
NOP
DEX
BNE @X
PLA
TAX
 Clobbers A, and Z&N 
PHA
PHP
SEC
LDA #11
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #11
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
NOP
PHP
SEC
LDA #8
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #8
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
TXA
PHA
LDX #7
@X:
NOP
DEX
BNE @X
PLA
TAX
PLA
 Clobbers Z&N
13 bytes 
NOP
PHP
PHA
SEC
LDA #7
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


69 cycles

6 bytes 
PHA
LDX #13
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
LDA $00
LDX #13
@X:
DEX
BNE @X
 Clobbers A, X, and Z&N 
LDA $00
LDY #13
@Y:
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
BIT $00
LDX #13
@X:
DEX
BNE @X
 Clobbers X, Z&N, and V 
BIT $00
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
STA @zptemp
LDX #13
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
STA @zptemp
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
NOP $00
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes 
NOP $00
LDX #13
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes
8 bytes 
JMP *+3
LDX #13
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
JMP *+3
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
 Clobbers A, S, Z&N, and C; and requires support for unofficial opcodes
9 bytes 
PHA
PHA
PHP
LDX #11
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHA
PHP
LDY #11
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
SEC
LDA #6
@A:
PHA
PHA
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C 
LDA $00
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
10 bytes 
NOP
TYA
PHA
LDY #11
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
NOP
PHP
LDY #11
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
NOP
NOP
PHP
LDX #11
@X:
DEX
BNE @X
PLP
 Clobbers X
11 bytes 
PHA
TXA
PHA
LDX #10
@X:
DEX
BNE @X
PLA
TAX
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #11
@A:
SBC #1
BNE @A
PLP
 Clobbers A
12 bytes 
NOP
PHP
PHA
SEC
LDA #10
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


70 cycles

6 bytes 
PLA
LDX #13
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N 
PLA
LDY #13
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N
7 bytes 
NOP
NOP
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
NOP
LDX #13
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #12
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #12
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #13
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #12
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #12
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
PHP
PHA
SEC
LDA #10
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
13 bytes 
PHP
PHA
LDA $00
SEC
LDA #10
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


71 cycles

5 bytes 
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #14
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHP
LDX #9
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #9
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
LDA $00
SEC
LDA #13
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PLA
TYA
PHA
LDY #11
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N
11 bytes 
PHP
PHA
SEC
LDA #136
@A = * - 1
; ^ Hides DEY
SBC #1
BMI @A
PLA
PLP
 Clobbers nothing, requires nothing


72 cycles

7 bytes 
PHA
PHA
LDX #13
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
PHA
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
8 bytes 
NOP
NOP
NOP
LDX #13
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
NOP
LDY #13
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
PLA
SEC
LDA #13
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TYA
PHA
LDY #12
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
PHP
LDX #8
@X:
BIT $00
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #8
@Y:
BIT $00
DEY
BNE @Y
PLP
 Clobbers Y
10 bytes 
NOP
PHP
SEC
LDA #12
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #12
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #11
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


73 cycles

6 bytes 
NOP
LDX #14
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDX #13
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #13
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #14
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
10 bytes 
PHP
SEC
LDA #9
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #9
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHP
PHA
SEC
LDA #8
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


74 cycles

6 bytes 
PHA
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
PHA
LDX #14
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N
7 bytes 
LDA $00
LDY #14
@Y:
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
LDA $00
LDX #14
@X:
DEX
BNE @X
 Clobbers A, X, and Z&N 
BIT $00
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
BIT $00
LDX #14
@X:
DEX
BNE @X
 Clobbers X, Z&N, and V 
STA @zptemp
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
STA @zptemp
LDX #14
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
NOP $00
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes 
NOP $00
LDX #14
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes
8 bytes 
JMP *+3
LDX #14
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
JMP *+3
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
9 bytes 
PHA
PHP
LDY #9
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #9
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X, and S 
NOP
PLA
SEC
LDA #13
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
10 bytes 
NOP
TYA
PHA
LDY #12
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
PHP
LDX #6
@X:
NOP
NOP
NOP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #6
@Y:
NOP
NOP
NOP
DEY
BNE @Y
PLP
 Clobbers Y
11 bytes 
PHA
TYA
PHA
LDY #11
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #12
@A:
SBC #1
BNE @A
PLP
 Clobbers A
12 bytes 
NOP
PHP
PHA
SEC
LDA #11
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


75 cycles

6 bytes 
PLA
LDX #14
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N 
PLA
LDY #14
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N
7 bytes 
NOP
NOP
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
NOP
LDX #14
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #13
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #13
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #14
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #13
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
TXA
PHA
LDX #8
@X:
NOP
DEX
BNE @X
PLA
TAX
PLA
 Clobbers Z&N 
PHA
PHP
PHA
SEC
LDA #11
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
13 bytes 
NOP
PHP
PHA
SEC
LDA #8
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


76 cycles

5 bytes 
LDX #15
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #15
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
PHA
PHP
LDX #13
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHP
LDY #13
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
BIT $00
LDY #13
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
BIT $00
LDX #13
@X:
DEX
BNE @X
PLP
 Clobbers X 
LDA $00
SEC
LDA #14
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PLA
TYA
PHA
LDY #12
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N 
PHA
PHP
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLP
 Clobbers A, and S; and requires support for unofficial opcodes 
PHA
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLA
 Clobbers S, Z&N, and C; and requires support for unofficial opcodes
11 bytes 
TYA
PHA
LDY #8
@Y:
LDA $00
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
PHA
PHP
SEC
LDA #9
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #9
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C 
NOP $00
PHP
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
NOP $00
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
12 bytes 
NOP
PHA
TYA
PHA
LDY #11
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
PHP
SEC
LDA #6
@A:
NOP
NOP
NOP
SBC #1
BNE @A
PLP
 Clobbers A
13 bytes 
NOP
NOP
PHP
PHA
SEC
LDA #11
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


77 cycles

7 bytes 
PHA
PHA
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
PHA
PHA
LDX #14
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N
8 bytes 
NOP
NOP
NOP
LDX #14
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
NOP
LDY #14
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
PLA
SEC
LDA #14
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TYA
PHA
LDY #13
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
PHP
LDY #13
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
NOP
PHP
LDX #13
@X:
DEX
BNE @X
PLP
 Clobbers X
10 bytes 
NOP
PHP
SEC
LDA #13
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #12
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


78 cycles

6 bytes 
LDX #11
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #11
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDY #14
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #14
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #15
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
PHP
SEC
LDA #13
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
PHP
LDA $00
SEC
LDA #13
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
13 bytes 
PHP
PLP
PHP
PHA
SEC
LDA #136
@A = * - 1
; ^ Hides DEY
SBC #1
BMI @A
PLA
PLP
 Clobbers nothing, requires nothing


79 cycles

6 bytes 
PHA
LDY #15
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N 
PHA
LDX #15
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N
7 bytes 
LDA $00
LDY #15
@Y:
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
LDA $00
LDX #15
@X:
DEX
BNE @X
 Clobbers A, X, and Z&N 
BIT $00
LDY #15
@Y:
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
BIT $00
LDX #15
@X:
DEX
BNE @X
 Clobbers X, Z&N, and V 
STA @zptemp
LDY #15
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
STA @zptemp
LDX #15
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
NOP $00
LDY #15
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes 
NOP $00
LDX #15
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes
8 bytes 
JMP *+3
LDY #15
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
JMP *+3
LDX #15
@X:
DEX
BNE @X
 Clobbers X, and Z&N
9 bytes 
PHA
PHA
PHP
LDX #13
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHA
PHP
LDY #13
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
NOP
PLA
SEC
LDA #14
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
10 bytes 
NOP
TYA
PHA
LDY #13
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
NOP
PHP
LDY #13
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
NOP
NOP
PHP
LDX #13
@X:
DEX
BNE @X
PLP
 Clobbers X
11 bytes 
PHA
TYA
PHA
LDY #12
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #13
@A:
SBC #1
BNE @A
PLP
 Clobbers A
12 bytes 
NOP
PHP
PHA
SEC
LDA #12
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


80 cycles

6 bytes 
PLA
LDY #15
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N 
PLA
LDX #15
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N
7 bytes 
NOP
LDY #11
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
LDX #11
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #14
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #14
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #11
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #14
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
12 bytes 
PHP
PHA
SEC
LDA #9
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


81 cycles

5 bytes 
LDY #16
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #16
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHA
PHP
LDY #14
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #14
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
SEC
LDA #15
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
BIT $00
LDY #14
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
BIT $00
LDX #14
@X:
DEX
BNE @X
PLP
 Clobbers X 
LDA $00
SEC
LDA #15
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PLA
TYA
PHA
LDY #13
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N
11 bytes 
NOP
NOP
TYA
PHA
LDY #13
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
PHA
PHA
PHP
SEC
LDA #13
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
12 bytes 
NOP
PHA
TYA
PHA
LDY #12
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
NOP
PHP
SEC
LDA #13
@A:
SBC #1
BNE @A
PLP
 Clobbers A
13 bytes 
NOP
NOP
PHP
PHA
SEC
LDA #12
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


82 cycles

6 bytes 
LDY #9
@Y:
PLA
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N 
LDX #9
@X:
PLA
DEX
BNE @X
 Clobbers A, X, S, and Z&N
7 bytes 
LDY #9
@Y:
NOP
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #9
@X:
NOP
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PLA
SEC
LDA #15
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TYA
PHA
LDY #14
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
PHP
LDX #14
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
NOP
PHP
LDY #14
@Y:
DEY
BNE @Y
PLP
 Clobbers Y
10 bytes 
NOP
PHP
SEC
LDA #14
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


83 cycles

6 bytes 
NOP
LDX #16
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #16
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDX #15
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #15
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #16
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
PHP
SEC
LDA #14
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
PHP
LDA $00
SEC
LDA #14
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
PHP
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLA
PLP
 Clobbers S; and requires support for unofficial opcodes
13 bytes 
PHA
TYA
PHA
LDY #8
@Y:
LDA $00
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
PHA
PHP
PHA
SEC
LDA #9
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers S 
NOP $00
PHP
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
14 bytes 
PHP
PHA
SEC
LDA #6
@A:
NOP
NOP
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


84 cycles

6 bytes 
PHA
LDX #16
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #16
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
LDA $00
LDX #16
@X:
DEX
BNE @X
 Clobbers A, X, and Z&N 
LDA $00
LDY #16
@Y:
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
BIT $00
LDY #16
@Y:
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
BIT $00
LDX #16
@X:
DEX
BNE @X
 Clobbers X, Z&N, and V 
STA @zptemp
LDX #16
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
STA @zptemp
LDY #16
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
NOP $00
LDY #16
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes 
NOP $00
LDX #16
@X:
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes 
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA,X ;hides 'NOP'
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
8 bytes 
JMP *+3
LDX #16
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
JMP *+3
LDY #16
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
9 bytes 
SEC
LDA #9
@A:
NOP
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHA
PHA
PHP
LDX #14
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHA
PHP
LDY #14
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S
10 bytes 
NOP
TYA
PHA
LDY #14
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
NOP
PHP
LDY #14
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
NOP
NOP
PHP
LDX #14
@X:
DEX
BNE @X
PLP
 Clobbers X
11 bytes 
PHA
TYA
PHA
LDY #13
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #14
@A:
SBC #1
BNE @A
PLP
 Clobbers A
12 bytes 
NOP
PHP
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


85 cycles

6 bytes 
LDY #12
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #12
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHP
LDY #11
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #11
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #16
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #15
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #15
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
PHP
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
13 bytes 
PHP
PHA
LDA $00
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


86 cycles

5 bytes 
LDX #17
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #17
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
PHA
PHP
LDY #15
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #15
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
SEC
LDA #16
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C 
NOP
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA,X ;hides 'NOP'
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
9 bytes 
PHP
BIT $00
LDX #15
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
BIT $00
LDY #15
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
LDA $00
SEC
LDA #16
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PLA
TYA
PHA
LDY #14
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N
11 bytes 
NOP
NOP
TYA
PHA
LDY #14
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
PHA
PHA
PHP
SEC
LDA #14
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
12 bytes 
NOP
PHA
TYA
PHA
LDY #13
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
NOP
PHP
SEC
LDA #14
@A:
SBC #1
BNE @A
PLP
 Clobbers A
13 bytes 
NOP
NOP
PHP
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


87 cycles

7 bytes 
NOP
LDX #12
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #12
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
SEC
LDA #12
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
TYA
PHA
LDY #15
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
PHP
LDY #11
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #11
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X
10 bytes 
PHP
SEC
LDA #11
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #11
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


88 cycles

6 bytes 
NOP
LDY #17
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
LDX #17
@X:
DEX
BNE @X
 Clobbers X, and Z&N
7 bytes 
PHP
LDY #16
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #16
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #17
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
PHP
SEC
LDA #15
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #15
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
PHP
LDA $00
SEC
LDA #15
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #15
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
13 bytes 
NOP
NOP
PHA
TYA
PHA
LDY #13
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
PHA
PHA
PHP
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
14 bytes 
NOP
NOP
NOP
PHP
PHA
SEC
LDA #13
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


89 cycles

6 bytes 
LDX #11
@X:
PHA
DEX
BNE @X
 Clobbers X, S, and Z&N 
LDY #11
@Y:
PHA
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
LDX #11
@X:
LDA $00
DEX
BNE @X
 Clobbers A, X, and Z&N 
LDY #11
@Y:
LDA $00
DEY
BNE @Y
 Clobbers A, Y, and Z&N 
LDX #11
@X:
BIT $00
DEX
BNE @X
 Clobbers X, Z&N, and V 
LDY #11
@Y:
BIT $00
DEY
BNE @Y
 Clobbers Y, Z&N, and V 
LDY #11
@Y:
STA @zptemp
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires @zptemp 
LDX #11
@X:
STA @zptemp
DEX
BNE @X
 Clobbers X, and Z&N; and requires @zptemp 
LDY #11
@Y:
NOP $00
DEY
BNE @Y
 Clobbers Y, and Z&N; and requires support for unofficial opcodes 
LDX #11
@X:
NOP $00
DEX
BNE @X
 Clobbers X, and Z&N; and requires support for unofficial opcodes
8 bytes 
LDX #11
@X:
JMP *+3
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #11
@Y:
JMP *+3
DEY
BNE @Y
 Clobbers Y, and Z&N
9 bytes 
PHP
LDY #9
@Y:
NOP
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #9
@X:
NOP
NOP
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #12
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
TXA
PHA
LDX #11
@X:
NOP
DEX
BNE @X
PLA
TAX
 Clobbers A, and Z&N
11 bytes 
PHA
TYA
PHA
LDY #14
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
PHP
SEC
LDA #11
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A
12 bytes 
NOP
PHP
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


90 cycles

6 bytes 
PLA
LDX #17
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N 
PLA
LDY #17
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N
7 bytes 
NOP
NOP
LDX #17
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
NOP
LDY #17
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
NOP
PHP
LDY #16
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #16
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #17
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #16
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #16
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
PHP
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
13 bytes 
PHP
PHA
LDA $00
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


91 cycles

5 bytes 
LDY #18
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #18
@X:
DEX
BNE @X
 Clobbers X, and Z&N
7 bytes 
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $48 ;hides 'PHA'
SBC #1
BMI @A
 Clobbers A, S, Z&N, and C; and requires support for unofficial opcodes
8 bytes 
PHA
PHP
LDX #16
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
PHP
LDY #16
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
SEC
LDA #11
@A:
PHA
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
BIT $00
LDX #16
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
BIT $00
LDY #16
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
LDA $00
SEC
LDA #17
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHP
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA,X ;hides 'NOP'
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA,X ;hides 'NOP'
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
10 bytes 
PLA
TYA
PHA
LDY #15
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, S, and Z&N
11 bytes 
PHP
SEC
LDA #9
@A:
NOP
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #9
@A:
NOP
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
NOP
PHA
TYA
PHA
LDY #14
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N
13 bytes 
NOP
NOP
PHP
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


92 cycles

6 bytes 
LDY #13
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #13
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N
7 bytes 
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA44 ;hides 'NOP zp'
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
8 bytes 
PHP
LDX #12
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #12
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
PLA
SEC
LDA #17
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TYA
PHA
LDY #16
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N
10 bytes 
NOP
PHP
SEC
LDA #16
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #16
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #15
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


93 cycles

6 bytes 
NOP
LDX #18
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #18
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
7 bytes 
PHP
LDX #17
@X:
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #17
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #18
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
PHP
SEC
LDA #16
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #16
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C 
NOP
PHP
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA,X ;hides 'NOP'
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
NOP
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA,X ;hides 'NOP'
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
11 bytes 
PHP
LDA $00
SEC
LDA #16
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #16
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
13 bytes 
NOP
NOP
PHA
TYA
PHA
LDY #14
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
PHA
PHA
PHP
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
14 bytes 
NOP
NOP
NOP
PHP
PHA
SEC
LDA #14
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


94 cycles

6 bytes 
PHA
LDX #18
@X:
DEX
BNE @X
 Clobbers X, S, and Z&N 
PHA
LDY #18
@Y:
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
NOP
LDX #13
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
NOP
LDY #13
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
SEC
LDA #13
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
NOP
PHP
LDY #12
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #12
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X
10 bytes 
PHP
SEC
LDA #12
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #12
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHA
TYA
PHA
LDY #15
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N
12 bytes 
PHP
PHA
SEC
LDA #11
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


95 cycles

6 bytes 
PLA
LDX #18
@X:
DEX
BNE @X
 Clobbers A, X, S, and Z&N 
PLA
LDY #18
@Y:
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N
7 bytes 
NOP
NOP
LDY #18
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
NOP
LDX #18
@X:
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
NOP
PHP
LDY #17
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #17
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #18
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #17
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #17
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
PHP
PHA
SEC
LDA #15
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S
13 bytes 
PHP
PHA
LDA $00
SEC
LDA #15
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


96 cycles

5 bytes 
LDX #19
@X:
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #19
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
PHA
PHP
LDY #17
@Y:
DEY
BNE @Y
PLP
 Clobbers Y, and S 
PHA
PHP
LDX #17
@X:
DEX
BNE @X
PLP
 Clobbers X, and S 
PHA
SEC
LDA #18
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
PHP
LDY #11
@Y:
BIT $00
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #11
@X:
BIT $00
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #13
@A:
NOP
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
TYA
PHA
LDY #12
@Y:
NOP
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N
11 bytes 
NOP
PHP
SEC
LDA #12
@A:
NOP
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #12
@A:
NOP
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
TXA
PHA
LDX #11
@X:
NOP
DEX
BNE @X
PLA
TAX
PLA
 Clobbers Z&N
13 bytes 
NOP
PHP
PHA
SEC
LDA #11
@A:
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


97 cycles

6 bytes 
LDX #12
@X:
PHA
DEX
BNE @X
 Clobbers X, S, and Z&N 
LDY #12
@Y:
PHA
DEY
BNE @Y
 Clobbers Y, S, and Z&N
7 bytes 
LDX #8
@X:
PHP
PLP
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #8
@Y:
PHP
PLP
DEY
BNE @Y
 Clobbers Y, and Z&N
8 bytes 
PLA
SEC
LDA #18
@A:
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
TYA
PHA
LDY #17
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N 
NOP
NOP
PHP
LDY #17
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
NOP
PHP
LDX #17
@X:
DEX
BNE @X
PLP
 Clobbers X
10 bytes 
NOP
PHP
SEC
LDA #17
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
NOP
PHA
SEC
LDA #17
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
11 bytes 
PHP
PHA
SEC
LDA #16
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


98 cycles

6 bytes 
NOP
LDY #19
@Y:
DEY
BNE @Y
 Clobbers Y, and Z&N 
NOP
LDX #19
@X:
DEX
BNE @X
 Clobbers X, and Z&N
7 bytes 
PHP
LDY #18
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
PHP
LDX #18
@X:
DEX
BNE @X
PLP
 Clobbers X 
SEC
LDA #19
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
10 bytes 
PHA
PHP
SEC
LDA #17
@A:
SBC #1
BNE @A
PLP
 Clobbers A, and S 
PHA
PHA
SEC
LDA #17
@A:
SBC #1
BNE @A
PLA
 Clobbers S, Z&N, and C
11 bytes 
PHP
SEC
LDA #11
@A:
BIT $00
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
LDA $00
SEC
LDA #17
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C 
PHP
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA,X ;hides 'NOP'
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
13 bytes 
PHP
PHA
SEC
LDA #9
@A:
NOP
NOP
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


99 cycles

6 bytes 
LDY #14
@Y:
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
LDX #14
@X:
NOP
DEX
BNE @X
 Clobbers X, and Z&N
8 bytes 
PHP
LDX #13
@X:
NOP
DEX
BNE @X
PLP
 Clobbers X 
PHP
LDY #13
@Y:
NOP
DEY
BNE @Y
PLP
 Clobbers Y 
SEC
LDA #12
@A:
PHA
SBC #1
BNE @A
 Clobbers A, S, Z&N, and C
9 bytes 
SEC
LDA #8
@A:
PHP
PLP
SBC #1
BNE @A
 Clobbers A, Z&N, and C 
PHP
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA44 ;hides 'NOP zp'
SBC #1
BMI @A
PLP
 Clobbers A; and requires support for unofficial opcodes 
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA44 ;hides 'NOP zp'
SBC #1
BMI @A
PLA
 Clobbers Z&N, and C; and requires support for unofficial opcodes
10 bytes 
NOP
TYA
PHA
LDY #17
@Y:
DEY
BNE @Y
PLA
TAY
 Clobbers A, and Z&N
11 bytes 
PHA
TYA
PHA
LDY #16
@Y:
DEY
BNE @Y
PLA
TAY
PLA
 Clobbers Z&N 
NOP
NOP
PHP
SEC
LDA #17
@A:
SBC #1
BNE @A
PLP
 Clobbers A
12 bytes 
NOP
PHP
PHA
SEC
LDA #16
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing


100 cycles

6 bytes 
LDY #11
@Y:
PLA
DEY
BNE @Y
 Clobbers A, Y, S, and Z&N 
LDX #11
@X:
PLA
DEX
BNE @X
 Clobbers A, X, S, and Z&N
7 bytes 
LDX #11
@X:
NOP
NOP
DEX
BNE @X
 Clobbers X, and Z&N 
LDY #11
@Y:
NOP
NOP
DEY
BNE @Y
 Clobbers Y, and Z&N 
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EAEA ;hides two 'NOP's
SBC #1
BMI @A
 Clobbers A, Z&N, and C; and requires support for unofficial opcodes
8 bytes 
NOP
PHP
LDY #18
@Y:
DEY
BNE @Y
PLP
 Clobbers Y 
NOP
PHP
LDX #18
@X:
DEX
BNE @X
PLP
 Clobbers X 
NOP
SEC
LDA #19
@A:
SBC #1
BNE @A
 Clobbers A, Z&N, and C
9 bytes 
PHP
SEC
LDA #18
@A:
SBC #1
BNE @A
PLP
 Clobbers A 
PHA
SEC
LDA #18
@A:
SBC #1
BNE @A
PLA
 Clobbers Z&N, and C
12 bytes 
PHA
PHP
PHA
SEC
LDA #16
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers S 
NOP
PHP
PHA
SEC
LDA #137
@A = * - 1
; ^ Hides !NOP #imm
NOP $EA,X ;hides 'NOP'
SBC #1
BMI @A
PLA
PLP
 Requires support for unofficial opcodes
13 bytes 
PHP
PHA
LDA $00
SEC
LDA #16
@A:
SBC #1
BNE @A
PLA
PLP
 Clobbers nothing, requires nothing

More

Bisqwit's 6502 delay_n macro set for ca65: http://bisqwit.iki.fi/src/6502-inline_delay.7z

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