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DEC (Super FX): Difference between revisions
From SnesLab
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* [[DEC (SPC700)]] | * [[DEC (SPC700)]] | ||
* [[DEX]] | |||
* [[DEY]] | |||
=== External Links === | === External Links === | ||
Latest revision as of 18:43, 30 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied (type 1) | En | 1 byte | 3 cycles | 3 cycles | 1 cycle | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | S | . | Z | ||
DEC is a Super FX instruction that decrements a register by one. The register selected can be from R0 to R14.
The ALT0 state is restored.
Syntax
DEC Rn
Example
Let:
R9 = a3f7h
After executing DEC R9:
R9 = a3f6h
See Also
External Links
- Official Nintendo documentation on DEC: 9.31 on page 2-9-43 of Book II