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BVC (SPC700): Difference between revisions
From SnesLab
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|'''Speed''' | |'''Speed''' | ||
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| | |[[Program Counter Relative]] | ||
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!colspan="8"|Flags Affected | !colspan="8"|Flags Affected | ||
|+ | |+ | ||
|N | |[[Negative Flag|N]] | ||
|V | |[[Overflow Flag|V]] | ||
|P | |[[Direct Page Flag|P]] | ||
|B | |[[Break Flag|B]] | ||
|H | |[[Half-Carry Flag|H]] | ||
|I | |[[Interrupt Enable Flag|I]] | ||
|Z | |[[Zero Flag|Z]] | ||
|C | |[[Carry Flag|C]] | ||
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'''BVC''' is an [[SPC700]] instruction that performs a branch when the overflow flag is clear. | '''BVC''' is an [[SPC700]] instruction that performs a branch when the [[overflow flag]] is clear. | ||
No flags are affected. | |||
==== Syntax ==== | |||
<pre> | |||
BVC rel | |||
</pre> | |||
Where rel is a two's complement offset. | |||
=== See Also === | === See Also === | ||
* [[BVS (SPC700)]] | * [[BVS (SPC700)]] | ||
* [[BVC]] | * [[BVC]] | ||
* [[CLRV]] | |||
=== External Links === | === External Links === | ||
* Official Super Nintendo development manual on BVC: [https://archive.org/details/SNESDevManual/book1/page/ | * Official Super Nintendo development manual on BVC: Table C-15, [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I] | ||
* anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L364 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Branching Commands]] | [[Category:Branching Commands]] | ||
[[Category:Two-byte Instructions]] | |||
Latest revision as of 21:59, 4 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Program Counter Relative | 50 | 2 bytes | when condition false: 2 cycles
when condition true: 4 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | . | . | . |
BVC is an SPC700 instruction that performs a branch when the overflow flag is clear.
No flags are affected.
Syntax
BVC rel
Where rel is a two's complement offset.
See Also
External Links
- Official Super Nintendo development manual on BVC: Table C-15, Appendix C-8 of Book I
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L364