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MICROPROCESSOR INSTRUCTION REFERENCE->DEC
DEC Decrement Operand
The operand is decremented by one.
No flags are affected.
Formats:
| Description | Mnemonic | Bytes | Cycles |
| Decrement accumulator: | DEC A | 1 | 1 |
| Decrement register: | DEC Rn | 1 | 1 |
| Decrement memory: | DEC <direct address> | 2 | 1 |
| Decrement indirect address: | DEC @Ri | 1 | 1 |