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BCS (Super FX): Difference between revisions
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!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
|+ | |+ | ||
|'''Addressing Mode''' | |||
|'''Opcode''' | |'''Opcode''' | ||
|'''Length''' | |'''Length''' | ||
| Line 8: | Line 9: | ||
|'''Cache Speed''' | |'''Cache Speed''' | ||
|+ | |+ | ||
|[[Program Counter Relative]] | |||
|0D?? | |0D?? | ||
|2 bytes | |2 bytes | ||
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!colspan="9"|Flags Affected | !colspan="9"|Flags Affected | ||
|+ | |+ | ||
|B | |[[B Flag|B]] | ||
|[[ALT1]] | |[[ALT1]] | ||
|[[ALT2]] | |[[ALT2]] | ||
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|[[Sign Flag|S]] | |[[Sign Flag|S]] | ||
|[[CY]] | |[[CY]] | ||
|Z | |[[Zero Flag|Z]] | ||
|+ | |+ | ||
|. | |. | ||
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|} | |} | ||
'''BCS''' (Branch on | '''BCS''' (Branch on Carry Set) is a [[Super FX]] instruction that performs a conditional jump. The instruction after BCS is already in the pipeline and will run even if the branch occurs. | ||
If [[CY]] is clear, BCS does not jump. | If [[CY]] is clear, BCS does not jump. | ||
No flags are affected. | |||
==== Syntax ==== | |||
<pre> | |||
BCS e | |||
</pre> | |||
==== Example ==== | |||
Let the carry flag be set. This instruction jumps the program backward 1 byte: | |||
<pre> | |||
BCS $-1h | |||
</pre> | |||
=== See Also === | === See Also === | ||
| Line 44: | Line 59: | ||
=== External Links === | === External Links === | ||
* Official Nintendo documentation on BCS: [https://archive.org/details/SNESDevManual/book2/page/n172 Page 2-9-16 of Book II] | * Official Nintendo documentation on BCS: 9.15 on [https://archive.org/details/SNESDevManual/book2/page/n172 Page 2-9-16 of Book II] | ||
* example: [https://archive.org/details/SNESDevManual/book2/page/n173 page 2-9-17], lbid. | * example: [https://archive.org/details/SNESDevManual/book2/page/n173 page 2-9-17], lbid. | ||
[[Category:Super FX]] | [[Category:Super FX]] | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Instructions with Delay Slots]] | |||
Latest revision as of 08:12, 14 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Program Counter Relative | 0D?? | 2 bytes | 6 cycles | 6 cycles | 2 cycles | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| . | . | . | . | . | . | . | ||
BCS (Branch on Carry Set) is a Super FX instruction that performs a conditional jump. The instruction after BCS is already in the pipeline and will run even if the branch occurs.
If CY is clear, BCS does not jump.
No flags are affected.
Syntax
BCS e
Example
Let the carry flag be set. This instruction jumps the program backward 1 byte:
BCS $-1h
See Also
External Links
- Official Nintendo documentation on BCS: 9.15 on Page 2-9-16 of Book II
- example: page 2-9-17, lbid.