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BVS (Super FX): Difference between revisions
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'''BVS''' (Branch Overflow Set) is a [[Super FX]] instruction that performs a branch when the overflow flag is set. | '''BVS''' (Branch Overflow Set) is a [[Super FX]] instruction that performs a branch when the overflow flag ([[O/V]]) is set. | ||
If the overflow flag is clear, control simply falls through and the branch does not happen. | |||
No flags are affected. | No flags are affected. |
Revision as of 04:19, 11 July 2024
Basic Info | |||||||
---|---|---|---|---|---|---|---|
Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
Program Counter Relative | 0F?? | 2 bytes | 6 cycles | 6 cycles | 2 cycles |
Flags Affected | ||||||||
---|---|---|---|---|---|---|---|---|
B | ALT1 | ALT2 | O/V | S | CY | Z | ||
. | . | . | . | . | . | . |
BVS (Branch Overflow Set) is a Super FX instruction that performs a branch when the overflow flag (O/V) is set.
If the overflow flag is clear, control simply falls through and the branch does not happen.
No flags are affected.
Syntax
BVS e
Example
Let the O/V flag be set. This instruction jumps the program backward 2 bytes:
BVS $-2h
See Also
External Links
- Official Nintendo documentation on BVS: 9.26 on Page 2-9-36 of Book II
- example: Page 2-9-37 of Book II, lbid.