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BCS (Super FX): Difference between revisions
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{| class="wikitable" style="float:right;clear:right;width: | {| class="wikitable" style="float:right;clear:right;width:50%" | ||
!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 | ||
| Line 24: | Line 26: | ||
|[[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. | 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 51: | Line 64: | ||
[[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.