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instructions.txt
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ADC Add Memory to Accumulator with Carry
A + M + C -> A, C N Z C I D V
+ + + - - +
addressing assembler opc bytes cyles
--------------------------------------------
immidiate ADC #oper 69 2 2
zeropage ADC oper 65 2 3
zeropage,X ADC oper,X 75 2 4
absolute ADC oper 6D 3 4
absolute,X ADC oper,X 7D 3 4*
absolute,Y ADC oper,Y 79 3 4*
(indirect,X) ADC (oper,X) 61 2 6
(indirect),Y ADC (oper),Y 71 2 5*
AND AND Memory with Accumulator
A AND M -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate AND #oper 29 2 2
zeropage AND oper 25 2 3
zeropage,X AND oper,X 35 2 4
absolute AND oper 2D 3 4
absolute,X AND oper,X 3D 3 4*
absolute,Y AND oper,Y 39 3 4*
(indirect,X) AND (oper,X) 21 2 6
(indirect),Y AND (oper),Y 31 2 5*
ASL Shift Left One Bit (Memory or Accumulator)
C <- [76543210] <- 0 N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
accumulator ASL A 0A 1 2
zeropage ASL oper 06 2 5
zeropage,X ASL oper,X 16 2 6
absolute ASL oper 0E 3 6
absolute,X ASL oper,X 1E 3 7
BCC Branch on Carry Clear
branch on C = 0 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BCC oper 90 2 2**
BCS Branch on Carry Set
branch on C = 1 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BCS oper B0 2 2**
BEQ Branch on Result Zero
branch on Z = 1 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BEQ oper F0 2 2**
BIT Test Bits in Memory with Accumulator
A AND M, M7 -> N, M6 -> V N Z C I D V
M7 + - - - M6
addressing assembler opc bytes cyles
--------------------------------------------
zeropage BIT oper 24 2 3
absolute BIT oper 2C 3 4
BMI Branch on Result Minus
branch on N = 1 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BMI oper 30 2 2**
BNE Branch on Result not Zero
branch on Z = 0 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BNE oper D0 2 2**
BPL Branch on Result Plus
branch on N = 0 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BPL oper 10 2 2**
BRK Force Break
interrupt, N Z C I D V
push PC+2, push SR - - - 1 - -
addressing assembler opc bytes cyles
--------------------------------------------
implied BRK 00 1 7
BVC Branch on Overflow Clear
branch on V = 0 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BVC oper 50 2 2**
BVS Branch on Overflow Set
branch on V = 1 N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
relative BVC oper 70 2 2**
CLC Clear Carry Flag
0 -> C N Z C I D V
- - 0 - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied CLC 18 1 2
CLD Clear Decimal Mode
0 -> D N Z C I D V
- - - - 0 -
addressing assembler opc bytes cyles
--------------------------------------------
implied CLD D8 1 2
CLI Clear Interrupt Disable Bit
0 -> I N Z C I D V
- - - 0 - -
addressing assembler opc bytes cyles
--------------------------------------------
implied CLI 58 1 2
CLV Clear Overflow Flag
0 -> V N Z C I D V
- - - - - 0
addressing assembler opc bytes cyles
--------------------------------------------
implied CLV B8 1 2
CMP Compare Memory with Accumulator
A - M N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate CMP #oper C9 2 2
zeropage CMP oper C5 2 3
zeropage,X CMP oper,X D5 2 4
absolute CMP oper CD 3 4
absolute,X CMP oper,X DD 3 4*
absolute,Y CMP oper,Y D9 3 4*
(indirect,X) CMP (oper,X) C1 2 6
(indirect),Y CMP (oper),Y D1 2 5*
CPX Compare Memory and Index X
X - M N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate CPX #oper E0 2 2
zeropage CPX oper E4 2 3
absolute CPX oper EC 3 4
CPY Compare Memory and Index Y
Y - M N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate CPY #oper C0 2 2
zeropage CPY oper C4 2 3
absolute CPY oper CC 3 4
DEC Decrement Memory by One
M - 1 -> M N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage DEC oper C6 2 5
zeropage,X DEC oper,X D6 2 6
absolute DEC oper CE 3 6
absolute,X DEC oper,X DE 3 7
DEX Decrement Index X by One
X - 1 -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied DEC CA 1 2
DEY Decrement Index Y by One
Y - 1 -> Y N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied DEC 88 1 2
EOR Exclusive-OR Memory with Accumulator
A EOR M -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate EOR #oper 49 2 2
zeropage EOR oper 45 2 3
zeropage,X EOR oper,X 55 2 4
absolute EOR oper 4D 3 4
absolute,X EOR oper,X 5D 3 4*
absolute,Y EOR oper,Y 59 3 4*
(indirect,X) EOR (oper,X) 41 2 6
(indirect),Y EOR (oper),Y 51 2 5*
INC Increment Memory by One
M + 1 -> M N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage INC oper E6 2 5
zeropage,X INC oper,X F6 2 6
absolute INC oper EE 3 6
absolute,X INC oper,X FE 3 7
INX Increment Index X by One
X + 1 -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied INX E8 1 2
INY Increment Index Y by One
Y + 1 -> Y N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied INY C8 1 2
JMP Jump to New Location
(PC+1) -> PCL N Z C I D V
(PC+2) -> PCH - - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
absolute JMP oper 4C 3 3
indirect JMP (oper) 6C 3 5
JSR Jump to New Location Saving Return Address
push (PC+2), N Z C I D V
(PC+1) -> PCL - - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
absolute JSR oper 20 3 6
LDA Load Accumulator with Memory
M -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate LDA #oper A9 2 2
zeropage LDA oper A5 2 3
zeropage,X LDA oper,X B5 2 4
absolute LDA oper AD 3 4
absolute,X LDA oper,X BD 3 4*
absolute,Y LDA oper,Y B9 3 4*
(indirect,X) LDA (oper,X) A1 2 6
(indirect),Y LDA (oper),Y B1 2 5*
LDX Load Index X with Memory
M -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate LDX #oper A2 2 2
zeropage LDX oper A6 2 3
zeropage,Y LDX oper,Y B6 2 4
absolute LDX oper AE 3 4
absolute,Y LDX oper,Y BE 3 4*
LDY Load Index Y with Memory
M -> Y N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate LDY #oper A0 2 2
zeropage LDY oper A4 2 3
zeropage,X LDY oper,X B4 2 4
absolute LDY oper AC 3 4
absolute,X LDY oper,X BC 3 4*
LSR Shift One Bit Right (Memory or Accumulator)
0 -> [76543210] -> C N Z C I D V
0 + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
accumulator LSR A 4A 1 2
zeropage LSR oper 46 2 5
zeropage,X LSR oper,X 56 2 6
absolute LSR oper 4E 3 6
absolute,X LSR oper,X 5E 3 7
NOP No Operation
--- N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied NOP EA 1 2
ORA OR Memory with Accumulator
A OR M -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
immidiate ORA #oper 09 2 2
zeropage ORA oper 05 2 3
zeropage,X ORA oper,X 15 2 4
absolute ORA oper 0D 3 4
absolute,X ORA oper,X 1D 3 4*
absolute,Y ORA oper,Y 19 3 4*
(indirect,X) ORA (oper,X) 01 2 6
(indirect),Y ORA (oper),Y 11 2 5*
PHA Push Accumulator on Stack
push A N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied PHA 48 1 3
PHP Push Processor Status on Stack
push SR N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied PHP 08 1 3
PLA Pull Accumulator from Stack
pull A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied PLA 68 1 4
PLP Pull Processor Status from Stack
pull SR N Z C I D V
from stack
addressing assembler opc bytes cyles
--------------------------------------------
implied PLP 28 1 4
ROL Rotate One Bit Left (Memory or Accumulator)
C <- [76543210] <- C N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
accumulator ROL A 2A 1 2
zeropage ROL oper 26 2 5
zeropage,X ROL oper,X 36 2 6
absolute ROL oper 2E 3 6
absolute,X ROL oper,X 3E 3 7
ROR Rotate One Bit Right (Memory or Accumulator)
C -> [76543210] -> C N Z C I D V
+ + + - - -
addressing assembler opc bytes cyles
--------------------------------------------
accumulator ROR A 6A 1 2
zeropage ROR oper 66 2 5
zeropage,X ROR oper,X 76 2 6
absolute ROR oper 6E 3 6
absolute,X ROR oper,X 7E 3 7
RTI Return from Interrupt
pull SR, pull PC N Z C I D V
from stack
addressing assembler opc bytes cyles
--------------------------------------------
implied RTI 40 1 6
RTS Return from Subroutine
pull PC, PC+1 -> PC N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied RTS 60 1 6
SBC Subtract Memory from Accumulator with Borrow
A - M - C -> A N Z C I D V
+ + + - - +
addressing assembler opc bytes cyles
--------------------------------------------
immidiate SBC #oper E9 2 2
zeropage SBC oper E5 2 3
zeropage,X SBC oper,X F5 2 4
absolute SBC oper ED 3 4
absolute,X SBC oper,X FD 3 4*
absolute,Y SBC oper,Y F9 3 4*
(indirect,X) SBC (oper,X) E1 2 6
(indirect),Y SBC (oper),Y F1 2 5*
SEC Set Carry Flag
1 -> C N Z C I D V
- - 1 - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied SEC 38 1 2
SED Set Decimal Flag
1 -> D N Z C I D V
- - - - 1 -
addressing assembler opc bytes cyles
--------------------------------------------
implied SED F8 1 2
SEI Set Interrupt Disable Status
1 -> I N Z C I D V
- - - 1 - -
addressing assembler opc bytes cyles
--------------------------------------------
implied SEI 78 1 2
STA Store Accumulator in Memory
A -> M N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage STA oper 85 2 3
zeropage,X STA oper,X 95 2 4
absolute STA oper 8D 3 4
absolute,X STA oper,X 9D 3 5
absolute,Y STA oper,Y 99 3 5
(indirect,X) STA (oper,X) 81 2 6
(indirect),Y STA (oper),Y 91 2 6
STX Store Index X in Memory
X -> M N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage STX oper 86 2 3
zeropage,Y STX oper,Y 96 2 4
absolute STX oper 8E 3 4
STY Sore Index Y in Memory
Y -> M N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
zeropage STY oper 84 2 3
zeropage,X STY oper,X 94 2 4
absolute STY oper 8C 3 4
TAX Transfer Accumulator to Index X
A -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TAX AA 1 2
TAY Transfer Accumulator to Index Y
A -> Y N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TAY A8 1 2
TSX Transfer Stack Pointer to Index X
SP -> X N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TSX BA 1 2
TXA Transfer Index X to Accumulator
X -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TXA 8A 1 2
TXS Transfer Index X to Stack Register
X -> SP N Z C I D V
- - - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TXS 9A 1 2
TYA Transfer Index Y to Accumulator
Y -> A N Z C I D V
+ + - - - -
addressing assembler opc bytes cyles
--------------------------------------------
implied TYA 98 1 2