6502 Reference
Ordered by Opcode
| Opcode |
Instruction |
Addressing Mode |
Flags |
| $00 | BRK | Implied | - - - - - - - |
| $01 | ORA ($NN,X) | Indexed Indirect | - Z- - - - N |
| $05 | ORA $NN | Zero Page | - Z- - - - N |
| $06 | ASL $NN | Zero Page | CZ- - - - N |
| $08 | PHP | Implied | - - - - - - - |
| $09 | ORA #$NN | Immediate | - Z- - - - N |
| $0a | ASL A | Accumulator | CZ- - - - N |
| $0d | ORA $NNNN | Absolute | - Z- - - - N |
| $0e | ASL $NNNN | Absolute | CZ- - - - N |
| $10 | BPL $NN | Relative | - - - - - - - |
| $11 | ORA ($NN),Y | Indirect Indexed | - Z- - - - N |
| $15 | ORA $NN,X | Zero Page,X | - Z- - - - N |
| $16 | ASL $NN,X | Zero Page,X | CZ- - - - N |
| $18 | CLC | Implied | C- - - - - - |
| $19 | ORA $NNNN,Y | Absolute,Y | - Z- - - - N |
| $1d | ORA $NNNN,X | Absolute,X | - Z- - - - N |
| $1e | ASL $NNNN,X | Absolute,X | CZ- - - - N |
| $20 | JSR $NNNN | Absolute | - - - - - - - |
| $21 | AND ($NN,X) | Indexed Indirect | - Z- - - - N |
| $24 | BIT $NN | Zero Page | - Z- - - VN |
| $25 | AND $NN | Zero Page | - Z- - - - N |
| $26 | ROL $NN | Zero Page | CZ- - - - N |
| $28 | PLP | Implied | CZIDBVN |
| $29 | AND #$NN | Immediate | - Z- - - - N |
| $2a | ROL A | Accumulator | CZ- - - - N |
| $2c | BIT $NNNN | Absolute | - Z- - - VN |
| $2d | AND $NNNN | Absolute | - Z- - - - N |
| $2e | ROL $NNNN | Absolute | CZ- - - - N |
| $30 | BMI $NN | Relative | - - - - - - - |
| $31 | AND ($NN),Y | Indirect Indexed | - Z- - - - N |
| $35 | AND $NN,X | Zero Page,X | - Z- - - - N |
| $36 | ROL $NN,X | Zero Page,X | CZ- - - - N |
| $38 | SEC | Implied | C- - - - - - |
| $39 | AND $NNNN,Y | Absolute,Y | - Z- - - - N |
| $3d | AND $NNNN,X | Absolute,X | - Z- - - - N |
| $3e | ROL $NNNN,X | Absolute,X | CZ- - - - N |
| $40 | RTI | Implied | - - - - - - - |
| $41 | EOR ($NN,X) | Indexed Indirect | - Z- - - - N |
| $45 | EOR $NN | Zero Page | - Z- - - - N |
| $46 | LSR $NN | Zero Page | CZ- - - - N |
| $48 | PHA | Implied | - - - - - - - |
| $49 | EOR #$NN | Immediate | - Z- - - - N |
| $4a | LSR A | Accumulator | CZ- - - - N |
| $4c | JMP $NNNN | Absolute | - - - - - - - |
| $4d | EOR $NNNN | Absolute | - Z- - - - N |
| $4e | LSR $NNNN | Absolute | CZ- - - - N |
| $50 | BVC $NN | Relative | - - - - - - - |
| $51 | EOR ($NN),Y | Indirect Indexed | - Z- - - - N |
| $55 | EOR $NN,X | Zero Page,X | - Z- - - - N |
| $56 | LSR $NN,X | Zero Page,X | CZ- - - - N |
| $58 | CLI | Implied | - - I- - - - |
| $59 | EOR $NNNN,Y | Absolute,Y | - Z- - - - N |
| $5d | EOR $NNNN,X | Absolute,X | - Z- - - - N |
| $5e | LSR $NNNN,X | Absolute,X | CZ- - - - N |
| $60 | RTS | Implied | - - - - - - - |
| $61 | ADC ($NN,X) | Indexed Indirect | CZ- - - VN |
| $65 | ADC $NN | Zero Page | CZ- - - VN |
| $66 | ROR $NN | Zero Page | CZ- - - - N |
| $68 | PLA | Implied | - Z- - - - N |
| $69 | ADC #$NN | Immediate | CZ- - - VN |
| $6a | ROR A | Accumulator | CZ- - - - N |
| $6c | JMP $NN | Indirect | - - - - - - - |
| $6d | ADC $NNNN | Absolute | CZ- - - VN |
| $6e | ROR $NNNN,X | Absolute,X | CZ- - - - N |
| $70 | BVS $NN | Relative | - - - - - - - |
| $71 | ADC ($NN),Y | Indirect Indexed | CZ- - - VN |
| $75 | ADC $NN,X | Zero Page,X | CZ- - - VN |
| $76 | ROR $NN,X | Zero Page,X | CZ- - - - N |
| $78 | SEI | Implied | - - I- - - - |
| $79 | ADC $NNNN,Y | Absolute,Y | CZ- - - VN |
| $7d | ADC $NNNN,X | Absolute,X | CZ- - - VN |
| $7e | ROR $NNNN | Absolute | CZ- - - - N |
| $81 | STA ($NN,X) | Indexed Indirect | - - - - - - - |
| $84 | STY $NN | Zero Page | - - - - - - - |
| $85 | STA $NN | Zero Page | - - - - - - - |
| $86 | STX $NN | Zero Page | - - - - - - - |
| $88 | DEY | Implied | - Z- - - - N |
| $8a | TXA | Implied | - Z- - - - N |
| $8c | STY $NNNN | Absolute | - - - - - - - |
| $8d | STA $NNNN | Absolute | - - - - - - - |
| $8e | STX $NNNN | Absolute | - - - - - - - |
| $90 | BCC $NN | Relative | - - - - - - - |
| $91 | STA ($NN),Y | Indirect Indexed | - - - - - - - |
| $94 | STY $NN,X | Zero Page,X | - - - - - - - |
| $95 | STA $NN,X | Zero Page,X | - - - - - - - |
| $96 | STX $NN,Y | Zero Page,Y | - - - - - - - |
| $98 | TYA | Implied | - Z- - - - N |
| $99 | STA $NNNN,Y | Absolute,Y | - - - - - - - |
| $9a | TXS | Implied | - - - - - - - |
| $9d | STA $NNNN,X | Absolute,X | - - - - - - - |
| $a0 | LDY #$NN | Immediate | - Z- - - - N |
| $a1 | LDA ($NN,X) | Indexed Indirect | - Z- - - - N |
| $a2 | LDX #$NN | Immediate | - Z- - - - N |
| $a4 | LDY $NN | Zero Page | - Z- - - - N |
| $a5 | LDA $NN | Zero Page | - Z- - - - N |
| $a6 | LDX $NN | Zero Page | - Z- - - - N |
| $a8 | TAY | Implied | - Z- - - - N |
| $a9 | LDA #$NN | Immediate | - Z- - - - N |
| $aa | TAX | Implied | - Z- - - - N |
| $ac | LDY $NNNN | Absolute | - Z- - - - N |
| $ad | LDA $NNNN | Absolute | - Z- - - - N |
| $ae | LDX $NNNN | Absolute | - Z- - - - N |
| $b0 | BCS $NN | Relative | - - - - - - - |
| $b1 | LDA ($NN),Y | Indirect Indexed | - Z- - - - N |
| $b4 | LDY $NN,X | Zero Page,X | - Z- - - - N |
| $b5 | LDA $NN,X | Zero Page,X | - Z- - - - N |
| $b6 | LDX $NN,Y | Zero Page,Y | - Z- - - - N |
| $b8 | CLV | Implied | - - - - - V- |
| $b9 | LDA $NNNN,Y | Absolute,Y | - Z- - - - N |
| $ba | TSX | Implied | - Z- - - - N |
| $bc | LDY $NNNN,X | Absolute,X | - Z- - - - N |
| $bd | LDA $NNNN,X | Absolute,X | - Z- - - - N |
| $be | LDX $NNNN,Y | Absolute,Y | - Z- - - - N |
| $c0 | CPY #$NN | Immediate | CZ- - - - N |
| $c1 | CMP ($NN,X) | Indexed Indirect | CZ- - - - N |
| $c4 | CPY $NN | Zero Page | CZ- - - - N |
| $c5 | CMP $NN | Zero Page | CZ- - - - N |
| $c6 | DEC $NN | Zero Page | - Z- - - - N |
| $c8 | INY | Implied | - Z- - - - N |
| $c9 | CMP #$NN | Immediate | CZ- - - - N |
| $ca | DEX | Implied | - Z- - - - N |
| $cc | CPY $NNNN | Absolute | CZ- - - - N |
| $cd | CMP $NNNN | Absolute | CZ- - - - N |
| $ce | DEC $NNNN | Absolute | - Z- - - - N |
| $d0 | BNE $NN | Relative | - - - - - - - |
| $d1 | CMP ($NN),Y | Indirect Indexed | CZ- - - - N |
| $d5 | CMP $NN,X | Zero Page,X | CZ- - - - N |
| $d6 | DEC $NN,X | Zero Page,X | - Z- - - - N |
| $d8 | CLD | Implied | - - - D- - - |
| $d9 | CMP $NNNN,Y | Absolute,Y | CZ- - - - N |
| $dd | CMP $NNNN,X | Absolute,X | CZ- - - - N |
| $de | DEC $NNNN,X | Absolute,X | - Z- - - - N |
| $e0 | CPX #$NN | Immediate | CZ- - - - N |
| $e1 | SBC ($NN,X) | Indexed Indirect | CZ- - - VN |
| $e4 | CPX $NN | Zero Page | CZ- - - - N |
| $e5 | SBC $NN | Zero Page | CZ- - - VN |
| $e6 | INC $NN | Zero Page | - Z- - - - N |
| $e8 | INX | Implied | - Z- - - - N |
| $e9 | SBC #$NN | Immediate | CZ- - - VN |
| $ea | NOP | Implied | - - - - - - - |
| $ec | CPX $NNNN | Absolute | CZ- - - - N |
| $ed | SBC $NNNN | Absolute | CZ- - - VN |
| $ee | INC $NNNN | Absolute | - Z- - - - N |
| $f0 | BEQ $NN | Relative | - - - - - - - |
| $f1 | SBC ($NN),Y | Indirect Indexed | CZ- - - VN |
| $f5 | SBC $NN,X | Zero Page,X | CZ- - - VN |
| $f6 | INC $NN,X | Zero Page,X | - Z- - - - N |
| $f8 | SED | Implied | - - - D- - - |
| $f9 | SBC $NNNN,Y | Absolute,Y | CZ- - - VN |
| $fd | SBC $NNNN,X | Absolute,X | CZ- - - VN |
| $fe | INC $NNNN,X | Absolute,X | - Z- - - - N |
Ordered by Nemonic
| Instruction |
Addressing Mode |
Opcode |
Flags |
| ADC #$NN | Immediate | $69 | CZ- - - VN |
| ADC $NNNN | Absolute | $6d | CZ- - - VN |
| ADC $NNNN,X | Absolute,X | $7d | CZ- - - VN |
| ADC $NNNN,Y | Absolute,Y | $79 | CZ- - - VN |
| ADC $NN | Zero Page | $65 | CZ- - - VN |
| ADC $NN,X | Zero Page,X | $75 | CZ- - - VN |
| ADC ($NN,X) | Indexed Indirect | $61 | CZ- - - VN |
| ADC ($NN),Y | Indirect Indexed | $71 | CZ- - - VN |
| AND #$NN | Immediate | $29 | - Z- - - - N |
| AND $NNNN | Absolute | $2d | - Z- - - - N |
| AND $NNNN,X | Absolute,X | $3d | - Z- - - - N |
| AND $NNNN,Y | Absolute,Y | $39 | - Z- - - - N |
| AND $NN | Zero Page | $25 | - Z- - - - N |
| AND $NN,X | Zero Page,X | $35 | - Z- - - - N |
| AND ($NN,X) | Indexed Indirect | $21 | - Z- - - - N |
| AND ($NN),Y | Indirect Indexed | $31 | - Z- - - - N |
| ASL A | Accumulator | $0a | CZ- - - - N |
| ASL $NNNN | Absolute | $0e | CZ- - - - N |
| ASL $NNNN,X | Absolute,X | $1e | CZ- - - - N |
| ASL $NN | Zero Page | $06 | CZ- - - - N |
| ASL $NN,X | Zero Page,X | $16 | CZ- - - - N |
| BCC $NN | Relative | $90 | - - - - - - - |
| BCS $NN | Relative | $b0 | - - - - - - - |
| BEQ $NN | Relative | $f0 | - - - - - - - |
| BIT $NNNN | Absolute | $2c | - Z- - - VN |
| BIT $NN | Zero Page | $24 | - Z- - - VN |
| BMI $NN | Relative | $30 | - - - - - - - |
| BNE $NN | Relative | $d0 | - - - - - - - |
| BPL $NN | Relative | $10 | - - - - - - - |
| BRK | Implied | $00 | - - - - - - - |
| BVC $NN | Relative | $50 | - - - - - - - |
| BVS $NN | Relative | $70 | - - - - - - - |
| CLC | Implied | $18 | C- - - - - - |
| CLD | Implied | $d8 | - - - D- - - |
| CLI | Implied | $58 | - - I- - - - |
| CLV | Implied | $b8 | - - - - - V- |
| CMP #$NN | Immediate | $c9 | CZ- - - - N |
| CMP $NNNN | Absolute | $cd | CZ- - - - N |
| CMP $NNNN,X | Absolute,X | $dd | CZ- - - - N |
| CMP $NNNN,Y | Absolute,Y | $d9 | CZ- - - - N |
| CMP $NN | Zero Page | $c5 | CZ- - - - N |
| CMP $NN,X | Zero Page,X | $d5 | CZ- - - - N |
| CMP ($NN,X) | Indexed Indirect | $c1 | CZ- - - - N |
| CMP ($NN),Y | Indirect Indexed | $d1 | CZ- - - - N |
| CPX #$NN | Immediate | $e0 | CZ- - - - N |
| CPX $NNNN | Absolute | $ec | CZ- - - - N |
| CPX $NN | Zero Page | $e4 | CZ- - - - N |
| CPY #$NN | Immediate | $c0 | CZ- - - - N |
| CPY $NNNN | Absolute | $cc | CZ- - - - N |
| CPY $NN | Zero Page | $c4 | CZ- - - - N |
| DEC $NNNN | Absolute | $ce | - Z- - - - N |
| DEC $NNNN,X | Absolute,X | $de | - Z- - - - N |
| DEC $NN | Zero Page | $c6 | - Z- - - - N |
| DEC $NN,X | Zero Page,X | $d6 | - Z- - - - N |
| DEX | Implied | $ca | - Z- - - - N |
| DEY | Implied | $88 | - Z- - - - N |
| EOR #$NN | Immediate | $49 | - Z- - - - N |
| EOR $NNNN | Absolute | $4d | - Z- - - - N |
| EOR $NNNN,X | Absolute,X | $5d | - Z- - - - N |
| EOR $NNNN,Y | Absolute,Y | $59 | - Z- - - - N |
| EOR $NN | Zero Page | $45 | - Z- - - - N |
| EOR $NN,X | Zero Page,X | $55 | - Z- - - - N |
| EOR ($NN,X) | Indexed Indirect | $41 | - Z- - - - N |
| EOR ($NN),Y | Indirect Indexed | $51 | - Z- - - - N |
| INC $NNNN | Absolute | $ee | - Z- - - - N |
| INC $NNNN,X | Absolute,X | $fe | - Z- - - - N |
| INC $NN | Zero Page | $e6 | - Z- - - - N |
| INC $NN,X | Zero Page,X | $f6 | - Z- - - - N |
| INX | Implied | $e8 | - Z- - - - N |
| INY | Implied | $c8 | - Z- - - - N |
| JMP $NNNN | Absolute | $4c | - - - - - - - |
| JMP $NN | Indirect | $6c | - - - - - - - |
| JSR $NNNN | Absolute | $20 | - - - - - - - |
| LDA #$NN | Immediate | $a9 | - Z- - - - N |
| LDA $NNNN | Absolute | $ad | - Z- - - - N |
| LDA $NNNN,X | Absolute,X | $bd | - Z- - - - N |
| LDA $NNNN,Y | Absolute,Y | $b9 | - Z- - - - N |
| LDA $NN | Zero Page | $a5 | - Z- - - - N |
| LDA $NN,X | Zero Page,X | $b5 | - Z- - - - N |
| LDA ($NN,X) | Indexed Indirect | $a1 | - Z- - - - N |
| LDA ($NN),Y | Indirect Indexed | $b1 | - Z- - - - N |
| LDX #$NN | Immediate | $a2 | - Z- - - - N |
| LDX $NNNN | Absolute | $ae | - Z- - - - N |
| LDX $NNNN,Y | Absolute,Y | $be | - Z- - - - N |
| LDX $NN | Zero Page | $a6 | - Z- - - - N |
| LDX $NN,Y | Zero Page,Y | $b6 | - Z- - - - N |
| LDY #$NN | Immediate | $a0 | - Z- - - - N |
| LDY $NNNN | Absolute | $ac | - Z- - - - N |
| LDY $NNNN,X | Absolute,X | $bc | - Z- - - - N |
| LDY $NN | Zero Page | $a4 | - Z- - - - N |
| LDY $NN,X | Zero Page,X | $b4 | - Z- - - - N |
| LSR A | Accumulator | $4a | CZ- - - - N |
| LSR $NNNN | Absolute | $4e | CZ- - - - N |
| LSR $NNNN,X | Absolute,X | $5e | CZ- - - - N |
| LSR $NN | Zero Page | $46 | CZ- - - - N |
| LSR $NN,X | Zero Page,X | $56 | CZ- - - - N |
| NOP | Implied | $ea | - - - - - - - |
| ORA #$NN | Immediate | $09 | - Z- - - - N |
| ORA $NNNN | Absolute | $0d | - Z- - - - N |
| ORA $NNNN,X | Absolute,X | $1d | - Z- - - - N |
| ORA $NNNN,Y | Absolute,Y | $19 | - Z- - - - N |
| ORA $NN | Zero Page | $05 | - Z- - - - N |
| ORA $NN,X | Zero Page,X | $15 | - Z- - - - N |
| ORA ($NN,X) | Indexed Indirect | $01 | - Z- - - - N |
| ORA ($NN),Y | Indirect Indexed | $11 | - Z- - - - N |
| PHA | Implied | $48 | - - - - - - - |
| PHP | Implied | $08 | - - - - - - - |
| PLA | Implied | $68 | - Z- - - - N |
| PLP | Implied | $28 | CZIDBVN |
| ROL A | Accumulator | $2a | CZ- - - - N |
| ROL $NNNN | Absolute | $2e | CZ- - - - N |
| ROL $NNNN,X | Absolute,X | $3e | CZ- - - - N |
| ROL $NN | Zero Page | $26 | CZ- - - - N |
| ROL $NN,X | Zero Page,X | $36 | CZ- - - - N |
| ROR A | Accumulator | $6a | CZ- - - - N |
| ROR $NNNN | Absolute | $7e | CZ- - - - N |
| ROR $NNNN,X | Absolute,X | $6e | CZ- - - - N |
| ROR $NN | Zero Page | $66 | CZ- - - - N |
| ROR $NN,X | Zero Page,X | $76 | CZ- - - - N |
| RTI | Implied | $40 | - - - - - - - |
| RTS | Implied | $60 | - - - - - - - |
| SBC #$NN | Immediate | $e9 | CZ- - - VN |
| SBC $NNNN | Absolute | $ed | CZ- - - VN |
| SBC $NNNN,X | Absolute,X | $fd | CZ- - - VN |
| SBC $NNNN,Y | Absolute,Y | $f9 | CZ- - - VN |
| SBC $NN | Zero Page | $e5 | CZ- - - VN |
| SBC $NN,X | Zero Page,X | $f5 | CZ- - - VN |
| SBC ($NN,X) | Indexed Indirect | $e1 | CZ- - - VN |
| SBC ($NN),Y | Indirect Indexed | $f1 | CZ- - - VN |
| SEC | Implied | $38 | C- - - - - - |
| SED | Implied | $f8 | - - - D- - - |
| SEI | Implied | $78 | - - I- - - - |
| STA $NNNN | Absolute | $8d | - - - - - - - |
| STA $NNNN,X | Absolute,X | $9d | - - - - - - - |
| STA $NNNN,Y | Absolute,Y | $99 | - - - - - - - |
| STA $NN | Zero Page | $85 | - - - - - - - |
| STA $NN,X | Zero Page,X | $95 | - - - - - - - |
| STA ($NN,X) | Indexed Indirect | $81 | - - - - - - - |
| STA ($NN),Y | Indirect Indexed | $91 | - - - - - - - |
| STX $NNNN | Absolute | $8e | - - - - - - - |
| STX $NN | Zero Page | $86 | - - - - - - - |
| STX $NN,Y | Zero Page,Y | $96 | - - - - - - - |
| STY $NNNN | Absolute | $8c | - - - - - - - |
| STY $NN | Zero Page | $84 | - - - - - - - |
| STY $NN,X | Zero Page,X | $94 | - - - - - - - |
| TAX | Implied | $aa | - Z- - - - N |
| TAY | Implied | $a8 | - Z- - - - N |
| TSX | Implied | $ba | - Z- - - - N |
| TXA | Implied | $8a | - Z- - - - N |
| TXS | Implied | $9a | - - - - - - - |
| TYA | Implied | $98 | - Z- - - - N |
Post questions or comments on Twitter @realemulator101, or if you find issues in the code, file them on
the github repository.