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BVC (Super FX): Difference between revisions
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'''BVC''' (Branch Overflow Clear) is a [[Super FX]] instruction that performs a branch when the overflow flag is clear. | '''BVC''' (Branch Overflow Clear) is a [[Super FX]] instruction that performs a branch when the overflow flag is clear. | ||
If the overflow flag is set, control simply falls through and the branch does not happen. | |||
No flags are affected. | No flags are affected. | ||
Revision as of 04:18, 11 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Program Counter Relative | 0E?? | 2 bytes | 6 cycles | 6 cycles | 2 cycles | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| . | . | . | . | . | . | . | ||
BVC (Branch Overflow Clear) is a Super FX instruction that performs a branch when the overflow flag is clear.
If the overflow flag is set, control simply falls through and the branch does not happen.
No flags are affected.
Syntax
BVC e
where e is a relative offset from -128 to 127.
Example
Let the O/V flag be clear. This instruction jumps the program forward 4 bytes:
BVC $+4h
See Also
External Links
- Official Nintendo documentation on BVC: 9.25 on Page 2-9-34 of Book II
- example: Page 2-9-35 of Book II, lbid.