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BCC (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]] | ||
|90 | |90 | ||
|2 bytes | |2 bytes | ||
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{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!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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|} | |} | ||
'''BCC''' is an [[SPC700]] instruction that performs a branch when the [[carry flag]] is clear. If the carry flag is set, control simply falls through BCC to the next instruction. | |||
No flags are affected. | |||
==== Syntax ==== | |||
<pre> | |||
BCC rel | |||
</pre> | |||
Where rel is a two's complement offset. | |||
=== See Also === | === See Also === | ||
* [[BCC]] | * [[BCC]] | ||
* [[BCS (SPC700)]] | |||
=== External Links === | |||
* Table C-15, [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I] of the official Super Nintendo development manual | |||
* anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L358 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Branching Commands]] | [[Category:Branching Commands]] | ||
[[Category:Two-byte Instructions]] | |||
Latest revision as of 15:24, 14 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Program Counter Relative | 90 | 2 bytes | when condition false: 2 cycles
when condition true: 4 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | . | . | . |
BCC is an SPC700 instruction that performs a branch when the carry flag is clear. If the carry flag is set, control simply falls through BCC to the next instruction.
No flags are affected.
Syntax
BCC rel
Where rel is a two's complement offset.
See Also
External Links
- Table C-15, Appendix C-8 of Book I of the official Super Nintendo development manual
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L358