DEC
Decrement Memory by One
Operation: M - 1 -> M
N V - B D I Z C / . . . . . / .
| Addressing Mode | Assembly Language Form | OP CODE | No. Bytes | No. Cycles |
|---|---|---|---|---|
| ZeroPage | DEC $FF | $C6 | 2 | 5 |
| ZeroPage,X | DEC $FF,X | $D6 | 2 | 6 |
| Absolute | DEC $FFFF | $CE | 3 | 6 |
| Absolute,X | DEC $FFFF,X | $DE | 3 | 7 |
For penalty cycles on the 65816, check the desired addressing mode.