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SBC (Super FX): Difference between revisions
From SnesLab
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=== Reference === | === Reference === | ||
* [https://archive.org/details/SNESDevManual/book2/page/n264 page 2-9-108 of Book II] of the official Super Nintendo development manual | * 9.78 on [https://archive.org/details/SNESDevManual/book2/page/n264 page 2-9-108 of Book II] of the official Super Nintendo development manual | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Super FX]] | [[Category:Super FX]] | ||
[[Category:Two-byte Instructions]] | [[Category:Two-byte Instructions]] | ||
Revision as of 01:53, 8 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| 3D6n | 2 bytes | 6 cycles | 6 cycles | 2 cycle | |||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | ||||||
SBC (SuBtract with Carry) is a Super FX instruction that performs a subtraction with regards to the carry flag. Unlike ADD (Super FX), ADC (Super FX) and SUB (Super FX), this one can only be used with registers, not with constant values since since the ALT3 version of SUB is a CMP (Super FX) instead.
Syntax
SBC Rn
See Also
Reference
- 9.78 on page 2-9-108 of Book II of the official Super Nintendo development manual