Back to Atari Technical Information page| \ LSD MSD \ |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | LSD / / MSD |
| 0 | BRK | ORA (IND,X) |
JAM * | SRA * (IND,X) |
NOP * Z-Page |
ORA Z-Page |
ASL Z-Page |
SRA * Z-Page |
PHP | ORA IMM |
ASL A |
ANC * IMM |
NOP * ABS |
ORA ABS |
ASL ABS |
SRA * ABS |
0 |
| 1 | BPL | ORA (IND),Y |
JAM * | SRA * (IND),Y |
NOP * Z-Page,X |
ORA Z-Page,X |
ASL Z-Page,X |
SRA * Z-Page,X |
CLC | ORA ABS,Y |
NOP * | SRA * ABS,Y |
NOP * ABS,X |
ORA ABS,X |
ASL ABS,X |
SRA * ABS,X |
1 |
| 2 | JSR ABS |
AND (IND,X) |
JAM * | RLA * (IND,X) |
BIT Z-Page |
AND Z-Page |
ROL Z-Page |
RLA * Z-Page |
PLP | AND IMM |
ROL A |
ANC * IMM |
BIT ABS |
AND ABS |
ROL ABS |
RLA * ABS |
2 |
| 3 | BMI | AND (IND),Y |
JAM * | RLA * (IND),Y |
NOP * Z-Page,X |
AND Z-Page,X |
ROL Z-Page,X |
RLA * Z-Page,X |
SEC | AND ABS,Y |
NOP * | RLA * ABS,Y |
NOP * ABS,X |
AND ABS,X |
ROL ABS,X |
RLA * ABS,X |
3 |
| 4 | RTI | EOR (IND,X) |
JAM * | SLO * (IND,X) |
NOP * Z-Page |
EOR Z-Page |
LSR Z-Page |
SLO * Z-Page |
PHA | EOR IMM |
LSR A |
ASR * IMM |
JMP ABS |
EOR ABS |
LSR ABS |
SLO * ABS |
4 |
| 5 | BVC | EOR (IND),Y |
JAM * | SLO * (IND),Y |
NOP * Z-Page,X |
EOR Z-Page,X |
LSR Z-Page,X |
SLO * Z-Page,X |
CLI | EOR ABS,Y |
NOP * | SLO * ABS,Y |
NOP * ABS,X |
EOR ABS,X |
LSR ABS,X |
SLO * ABS,X |
5 |
| 6 | RTS | ADC (IND,X) |
JAM * | RRA * (IND,X) |
NOP * Z-Page |
ADC Z-Page |
ROR Z-Page |
RRA * Z-Page |
PLA | ADC IMM |
ROR A |
ARR * IMM |
JMP Indirect |
ADC ABS |
ROR ABS |
RRA * ABS |
6 |
| 7 | BVS | ADC (IND),Y |
JAM * | RRA * (IND),Y |
NOP * Z-Page,X |
ADC Z-Page,X |
ROR Z-Page,X |
RRA * Z-Page,X |
SEI | ADC ABS,Y |
NOP * | RRA * ABS,Y |
NOP * ABS,X |
ADC ABS,X |
ROR ABS,X |
RRA * ABS,X |
7 |
| 8 | NOP * IMM |
STA (IND,X) |
NOP * IMM |
SAX * (IND,X) |
STY Z-Page |
STA Z-Page |
STX Z-Page |
SAX * Z-Page |
DEY | NOP * IMM |
TXA | AXE * IMM |
STY ABS |
STA ABS |
STX ABS |
SAX * ABS |
8 |
| 9 | BCC | STA (IND),Y |
JAM * | AX7 * (IND),Y |
STY Z-Page,X |
STA Z-Page,X |
STX Z-Page,Y |
SAX * Z-Page,Y |
TYA | STA ABS,Y |
TXS | XS7 * ABS,Y |
SY7 * ABS,X |
STA ABS,X |
SX7 * ABS,Y |
AX7 * ABS,Y |
9 |
| A | LDY IMM |
LDA (IND,X) |
LDX IMM |
LAX * (IND,X) |
LDY Z-Page |
LDA Z-Page |
LDX Z-Page |
LAX * Z-Page |
TAY | LDA IMM |
TAX | XEA * IMM |
LDY ABS |
LDA ABS |
LDX ABS |
LAX * ABS |
A |
| B | BCS | LDA (IND),Y |
JAM * | LAX * (IND),Y |
LDY Z-Page,X |
LDA Z-Page,X |
LDX Z-Page,Y |
LAX * Z-Page,Y |
CLV | LDA ABS,Y |
TSX | LAS * ABS,Y |
LDY ABS,X |
LDA ABS,X |
LDX ABS,Y |
LAX * ABS,Y |
B |
| C | CPY IMM |
CMP (IND,X) |
NOP * IMM |
DCP * (IND,X) |
CPY Z-Page |
CMP Z-Page |
DEC Z-Page |
DCP * Z-Page |
INY | CMP IMM |
DEX | ASX * IMM |
CPY ABS |
CMP ABS |
DEC ABS |
DCP * ABS |
C |
| D | BNE | CMP (IND),Y |
JAM * | DCP * (IND),Y |
NOP * Z-Page,X |
CMP Z-Page,X |
DEC Z-Page,X |
DCP * Z-Page,X |
CLD | CMP ABS,Y |
NOP * | DCP * ABS,Y |
NOP * ABS,X |
CMP ABS,X |
DEC ABS,X |
DCP * ABS,X |
D |
| E | CPX IMM |
SBC (IND,X) |
NOP * IMM |
ISB * (IND,X) |
CPX Z-Page |
SBC Z-Page |
INC Z-Page |
ISB * Z-Page |
INX | SBC IMM |
NOP | SBC * IMM |
CPX ABS |
SBC ABS |
INC ABS |
ISB * ABS |
E |
| F | BEQ | SBC (IND),Y |
JAM * | ISB * (IND),Y |
NOP * Z-Page,X |
SBC Z-Page,X |
INC Z-Page,X |
ISB * Z-Page,X |
SED | SBC ABS,Y |
NOP * | ISB * ABS,Y |
NOP * ABS,X |
SBC ABS,X |
INC ABS,X |
ISB * ABS,X |
F |
| MSD / / LSD |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | \ MSD LSD \ |
* Undocumented instruction. The behavior of these opcodes was observed on an Atari 800. It may vary with other 6502-based CPU's.
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