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CMPW (SPC700): Difference between revisions
From SnesLab
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=== External Links === | === External Links === | ||
* Official Nintendo documentation on CMPW: [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I] | * Official Nintendo documentation on CMPW: Table C-12 in [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I] | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:16-bit Operation Commands]] | [[Category:16-bit Operation Commands]] | ||
Revision as of 10:02, 20 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Direct Page | 5A | 2 bytes | 4 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | |||
CMPW (Compare Word) is an SPC700 command that performs a comparsion between YA and a 16-bit word in the direct page. Internally, this is done by the ALU subtracting the direct page word from YA, but the difference is not stored anywhere.
See Also
External Links
- Official Nintendo documentation on CMPW: Table C-12 in Appendix C-8 of Book I