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ADC (Super FX): Difference between revisions
From SnesLab
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| | |O/V | ||
| | |S | ||
| | |CY | ||
| | |Z | ||
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Latest revision as of 18:30, 30 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied (type 1) | 3D5n | 2 bytes | 6 cycles | 6 cycles | 2 cycles | ||
| Immediate | 3F5n | 2 bytes | 6 cycles | 6 cycles | 2 cycles | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | O/V | S | CY | Z | ||
ADC (Add with carry) is a Super FX instruction that performs an addition. The source register is always the first addend. The second addend may be any of the 16 R registers or an immediate value. The third addend is CY. The sum is stored in the destination register.
The ALT0 state is restored.
The source and destination registers should be specified in advance using WITH, FROM, or TO. Otherwise, R0 serves as the default.
Syntax
ADC Rn ADC #n
Example 1
ADC R1 ; R0 + R1 + CY -> R0 WITH R2 ; set the source/destination regs to R2 ADC R3 ; R2 + R3 + CY -> R2 ADC R2 ; R0 + R2 + CY -> R0
Example 2
ADC #9h ; R0 + 0009h + CY -> R0 FROM R3 ; set the source reg to R3 ADC #5h ; R3 + 0005h + CY -> R0 ADC #0ah ; R0 + 000ah + CY -> R0
See Also
External Links
- Official Nintendo documentation on ADC: Page 2-9-3 of Book II
- ADC with immediate addressing: Page 2-9-4 of Book II, lbid.