Voici un tableau de référence des différents instructions du microprocesseur 6502 avec les opcodes du code machine :
| Nom | Syntaxe | Code machine | Algorithme |
|---|---|---|---|
| ADC | ADC n | 69h nnh | A ← A+n+C |
| ADC | ADC pq | 6Dh qqh pph | A ← A+(pq)+C |
| ADC | ADC q | 65h qqh | A ← A+(oq)+C |
| ADC | ADC pq,X | 7Dh qqh pph | A ← A+(pq+X)+C |
| ADC | ADC pq,Y | 79h qqh pph | A ← A+(pq+Y)+C |
| ADC | ADC q,X | 75h qqh | A ← A+(oq+X)+C |
| ADC | ADC d,X | 61h ddh | l ← (od+X) h ← (od+X+1) A ← A+(hl)+C |
| ADC | ADC d,Y | 71h ddh | l ← (od) h ← (od+1) A ← A+(hl)+C |
| AND | AND n | 29h nnh | A ← A ∩ n |
| AND | AND pq | 2Dh qqh pph | A ← A ∩ (pq) |
| AND | AND q | 25h qqh | A ← A ∩ (oq) |
| AND | AND pq,X | 3Dh qqh pph | A ← A ∩ (pq+X) |
| AND | AND pq,Y | 39h qqh pph | A ← A ∩ (pq+Y) |
| AND | AND q,X | 35h qqh | A ← A ∩ (oq+X) |
| AND | AND d,X | 21h ddh | l ← (od+X) h ← (od+X+1) A ← A ∩ (hl) |
| AND | AND d,Y | 31h ddh | l ← (od) h ← (od+1) A ← A ∩ (hl+Y) |
| ASL | ASL | 0Ah | C ← 7 ← 0 ← 0 |
| ASL | ASL pq | 0Eh qqh pph | p ↔ q |
| ASL | ASL q | 06h qqh | o ↔ q |
| ASL | ASL pq,X | 1Eh qqh pph | p ↔ q + X |
| ASL | ASL q,X | 16h qqh | o ↔ q + X |
| BCC | BCC e | 90h eeh | SI C = 0 ALORS PC ← PC + 2+e FIN SI SI C = 1 ALORS PC ← PC + 2 FIN SI |
| BCS | BCS e | B0h eeh | SI C = 1 ALORS PC ← PC + 2+e FIN SI SI C = 0 ALORS PC ← PC + 2 FIN SI |
| BEQ | BEQ e | F0h eeh | SI Z = 1 ALORS PC ← PC + 2+e FIN SI SI Z = 0 ALORS PC ← PC + 2 FIN SI |
| BIT | BIT pq | 2Ch qqh pph | Z ← A ∩ (pq) N ← (pq)7 V ← (pq)6 |
| BIT | BIT q | 24h qqh | Z ← A ∩ (pq) N ← (oq)7 V ← (oq)6 |
| BMI | BMI e | 30h eeh | SI N = 1 ALORS PC ← PC + 2+e FIN SI SI N = 0 ALORS PC ← PC + 2 FIN SI |
| BNE | BNE e | D0h eeh | SI Z = 0 ALORS PC ← PC + 2+e FIN SI SI Z = 1 ALORS PC ← PC + 2 FIN SI |
| BPL | BPL e | 10h eeh | SI N = 0 ALORS PC ← PC + 2+e FIN SI SI N = 1 ALORS PC ← PC + 2 FIN SI |
| BRK | BRK | 00h | PC ← PC+2 (SP)=PCh SP ← SP-1 (SP) ← PCb SP ← SP-1 (SP) ← P SP ← SP-1 PCb ← (FFFE) PCh ← (FFFE) |
| BVC | BVC e | 50h eeh | SI V = 0 ALORS PC ← PC + 2+e FIN SI SI V = 1 ALORS PC ← PC + 2 FIN SI |
| BVS | BVS e | 70h eeh | SI V = 1 ALORS PC ← PC + 2+e FIN SI SI V = 0 ALORS PC ← PC + 2 FIN SI |
| CLC | CLC | 18h | C ← 0 |
| CLD | CLD | D8h | D ← 0 |
| CLI | CLI | 58h | I ← 0 |
| CLV | CLV | B8h | V ← 0 |
| CMP | CMP n | C9h nnh | A = n |
| CMP | CMP pq | CDh qqh pph | A = (pq) |
| CMP | CMP q | C5h qqh | A = (oq) |
| CMP | CMP pq,X | DDh qqh pph | A = (pq+X) |
| CMP | CMP pq,Y | D9h qqh pph | A = (pq+Y) |
| CMP | CMP q,X | D5h qqh | A = (oq+X) |
| CMP | CMP d,X | C1h ddh | l ← (od+X) h ← (od+X+1) A = (hl) |
| CMP | CMP d,Y | D1h ddh | l ← (od) h ← (od+1) A = (hl+Y) |
| CPX | CPX n | E0h nnh | X = n |
| CPX | CPX pq | ECh qqh pph | X = (pq) |
| CPX | CPX q | E4h qqh | X = (oq) |
| CPY | CPY n | C0h nnh | Y = n |
| CPY | CPY pq | CCh qqh pph | Y = (pq) |
| CPY | CPY q | C4h qqh | Y = (oq) |
| DEC | DEC pq | CEh qqh pph | (pq) ← (pq) - 1 |
| DEC | DEC q | C6h qqh | (oq) ← (oq) - 1 |
| DEC | DEC pq,X | DEh qqh pph | (pq+X) ← (pq+X) - 1 |
| DEC | DEC q,X | D6h qqh | (oq+X) ← (oq+X) - 1 |
| DEX | DEX | CAh | X ← X - 1 |
| DEY | DEY | 88h | Y ← Y - 1 |
| EOR | EOR n | 49h nnh | A ← A ^ n |
| EOR | EOR pq | 4Dh qqh pph | A ← A ^ (pq) |
| EOR | EOR q | 45h qqh | A ← A ^ (oq) |
| EOR | EOR pq,X | 5Dh qqh pph | A ← A ^ (pq+X) |
| EOR | EOR pq,Y | 59h qqh pph | A ← A ^ (pq+Y) |
| EOR | EOR q,X | 55h qqh | A ← A ^ (oq+X) |
| EOR | EOR d,X | 41h ddh | l ← (od+X) h ← (od+X+1) A ← A ^ (hl) |
| EOR | EOR d,Y | 51h ddh | l ← (od) h ← (od+1) A ← A ^ (hl+Y) |
| INC | INC pq | EEh qqh pph | (pq) ← (pq) + 1 |
| INC | INC q | E6h qqh | (oq) ← (oq) + 1 |
| INC | INC pq,X | FEh qqh pph | (pq+X) ← (pq+X) + 1 |
| INC | INC q,X | F6h qqh | (oq+X) ← (oq+X) + 1 |
| INX | INX | E8h | X ← X + 1 |
| INY | INY | C8h | Y ← Y + 1 |
| JMP | JMP pq | 4Ch qqh pph | PC ← pq |
| JMP | JMP pq,IND | 6Ch qqh pph | l ← (pq) h ← (pq+1) PC ← hl |
| JSR | JSR pq | 20h qqh pph | PC ← PC + 2 (SP) ← PCh SP ← SP - 1 (SP) ← PCb SP ← SP - 1 PC ← pq |
| LDA | LDA n | A9h nnh | A ← n |
| LDA | LDA pq | ADh qqh pph | A ← (pq) |
| LDA | LDA q | A5h qqh | A ← (oq) |
| LDA | LDA pq,X | BDh qqh pph | A ← (pq+X) |
| LDA | LDA pq,Y | B9h qqh pph | A ← (pq+Y) |
| LDA | LDA q,X | B5h qqh | A ← (oq+X) |
| LDA | LDA d,X | A1h ddh | l ← (od+X) h ← (od+X+1) A ← (hl) |
| LDA | LDA d,Y | B1h ddh | l ← (od) h ← (od+1) A ← (hl+Y) |
| LDX | LDX n | A2h nnh | X ← n |
| LDX | LDX pq | AEh qqh pph | X ← (pq) |
| LDX | LDX q | A6h qqh | X ← (oq) |
| LDX | LDX pq,Y | BEh qqh pph | X ← (pq+Y) |
| LDX | LDX q,Y | B6h qqh | X ← (oq+Y) |
| LDY | LDY n | A0h nnh | Y ← n |
| LDY | LDY pq | ACh qqh pph | Y ← (pq) |
| LDY | LDY q | A4h qqh | Y ← (oq) |
| LDY | LDY pq,X | BCh qqh pph | Y ← (pq+X) |
| LDY | LDY q,X | B4h qqh | Y ← (oq+X) |
| LSR | LSR | 4Ah | 0 → 7 → 0 → C |
| LSR | LSR pq | 4Eh qqh pph | p ↔ q |
| LSR | LSR q | 46h qqh | o ↔ q |
| LSR | LSR pq,X | 5Eh qqh pph | p ↔ q + X |
| LSR | LSR q,X | 56h qqh | o ↔ q + X |
| NOP | NOP | EAh | |
| ORA | ORA n | 09h nnh | A ← A U n |
| ORA | ORA pq | 0Dh qqh pph | A ← A U (pq) |
| ORA | ORA q | 05h qqh | A ← A U (oq) |
| ORA | ORA pq,X | 1Dh qqh pph | A ← A U (pq+X) |
| ORA | ORA pq,Y | 19h qqh pph | A ← A U (pq+Y) |
| ORA | ORA q,X | 15h qqh | A ← A U (oq+X) |
| ORA | ORA d,X | 01h ddh | l ← (od+X) h ← (od+X+1) A ← A U (hl) |
| ORA | ORA d,Y | 11h ddh | l ← (od) h ← (od+1) A ← A U (hl+Y) |
| PHA | PHA | 48h | (SP) ← A SP ← SP - 1 |
| PHP | PHP | 08h | (SP) ← P SP ← SP - 1 |
| PLA | PLA | 68h | (SP) ← A SP ← SP + 1 |
| PLP | PLP | 28h | (SP) ← P SP ← SP + 1 |
| ROL | ROL | 2Ah | A ↔ C ← 7 ↔ 0 |
| ROL | ROL pq | 2Eh qqh pph | pq ← 7 ↔ 0 |
| ROL | ROL q | 26h qqh | oq ← 7 ↔ 0 |
| ROL | ROL pq,X | 3Eh qqh pph | pq ← 7 ↔ 0 |
| ROL | ROL q,X | 36h qqh | oq ← 7 ↔ 0 |
| ROR | ROR | 6Ah | A ↔ C ← 7 ↔ 0 |
| ROR | ROR pq | 6Eh qqh pph | pq ← 7 ↔ 0 |
| ROR | ROR q | 66h qqh | oq ← 7 ↔ 0 |
| ROR | ROR pq,X | 7Eh qqh pph | pq ← 7 ↔ 0 |
| ROR | ROR q,X | 76h qqh | oq ← 7 ↔ 0 |
| RTI | RTI | 40h | P ← (SP) SP ← SP + 1 PCb ← (SP) SP ← SP + 1 PCh ← (SP) SP ← SP + 1 |
| RTS | RTS | 60h | PCb ← (SP) SP ← SP + 1 PCh ← (SP) SP ← SP + 1 PC ← PC + 1 |
| SBC | SBC n | E9h nnh | A ← A - n - C |
| SBC | SBC pq | E9h qqh pph | A ← A - (pq) - C |
| SBC | SBC oq | E5h qqh | A ← A - (oq) - C |
| SBC | SBC pq,X | FDh qqh pph | A ← A - (pq+X) - C |
| SBC | SBC pq,Y | F9h qqh pph | A ← A - (pq+Y) - C |
| SBC | SBC q,X | F5h qqh | A ← A - (oq+X) - C |
| SBC | SBC d,X | E1h ddh | A ← A - (od+X) - C A ← A - (od+X+1) - C A ← A - (hl) - C |
| SBC | SBC d,Y | F1h ddh | A ← A - (od) - C A ← A - (od+1) - C A ← A - (hl+Y) - C |
| SEC | SEC | 38h | C ← 1 |
| SED | SED | F8h | D ← 1 |
| SEI | SEI | 78h | I ← 1 |
| STA | STA pq | 8Dh qqh pph | (pq) ← A |
| STA | STA oq | 85h qqh | (oq) ← A |
| STA | STA pq,X | 9Dh qqh pph | (pq+X) ← A |
| STA | STA pq,Y | 99h qqh pph | (pq+Y) ← A |
| STA | STA oq,X | 95h qqh | (oq+X) ← A |
| STA | STA oq,X | 81h ddh | l ← (od+X) h ← (od+X+1) (hl) ← A |
| STA | STA oq,Y | 91h ddh | l ← (od) h ← (od+1) (hl+Y) ← A |
| STX | STX pq | 8Eh qqh pph | (pq) ← X |
| STX | STX oq | 86h qqh | (oq) ← X |
| STX | STX q,Y | 96h qqh | (oq+Y) ← X |
| STY | STY pq | 8Ch qqh pph | (pq) ← Y |
| STY | STY oq | 84h qqh | (oq) ← Y |
| STY | STY q,X | 94h qqh | (oq+X) ← Y |
| TAX | TAX | AAh | X ← A |
| TAY | TAY | A8h | Y ← A |
| TSX | TSX | BAh | X ← S |
| TXA | TXA | 8Ah | A ← X |
| TXS | TXS | 9Ah | S ← X |
| TYA | TYA | 98h | A ← Y |
Dernière mise à jour : Mardi, le 6 décembre 2016