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BCS (SPC700): Difference between revisions
From SnesLab
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!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
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|'''Speed''' | |'''Speed''' | ||
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| | |[[Program Counter Relative]] | ||
|B0 | |B0 | ||
|2 bytes | |2 bytes | ||
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!colspan="8"|Flags | !colspan="8"|Flags Affected | ||
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|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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|. | |. | ||
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'''BCS''' is an [[SPC700]] instruction that performs a branch when the [[carry flag]] is set. If the carry flag is clear, control simply falls through BCS to the next instruction. | |||
No flags are affected. | |||
==== Syntax ==== | |||
<pre> | |||
BCS rel | |||
</pre> | |||
Where rel is a two's complement offset. | |||
=== See Also === | === See Also === | ||
* [[BCS]] | * [[BCS]] | ||
* [[BCC (SPC700)]] | |||
=== External Links === | === External Links === | ||
* Official Super Nintendo development manual on BCS: [https://archive.org/details/SNESDevManual/book1/page/ | * Official Super Nintendo development manual on BCS: 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#L359 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Branching Commands]] | [[Category:Branching Commands]] | ||
[[Category:Two-byte Instructions]] | |||
Latest revision as of 15:26, 14 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Program Counter Relative | B0 | 2 bytes | when condition false: 2 cycles
when condition true: 4 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | . | . | . |
BCS is an SPC700 instruction that performs a branch when the carry flag is set. If the carry flag is clear, control simply falls through BCS to the next instruction.
No flags are affected.
Syntax
BCS rel
Where rel is a two's complement offset.
See Also
External Links
- Official Super Nintendo development manual on BCS: Table C-15, Appendix C-8 of Book I
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L359