We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
SUBW (SPC700): Difference between revisions
From SnesLab
(added syntax) |
(made flags affected more prominent) |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 25: | Line 25: | ||
|[[Carry Flag|C]] | |[[Carry Flag|C]] | ||
|+ | |+ | ||
| | |N | ||
| | |V | ||
|. | |. | ||
|. | |. | ||
| | |H | ||
|. | |. | ||
| | |Z | ||
| | |C | ||
|} | |} | ||
'''SUBW''' (Subtract Word) is an [[SPC700]] command that subtracts a 16-bit [[direct page]] word from [[YA]]. | '''SUBW''' (Subtract Word) is an [[SPC700]] command that subtracts a 16-bit [[direct page]] word from [[YA]]. The difference is stored in YA. | ||
==== Syntax ==== | ==== Syntax ==== | ||
| Line 50: | Line 50: | ||
=== External Links === | === External Links === | ||
* Official Super Nintendo development manual on SUBW: Table C-12 in [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I] | * Official Super Nintendo development manual on SUBW: Table C-12 in [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I] | ||
* anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L587 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Latest revision as of 14:40, 30 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Direct Page | 9A | 2 bytes | 5 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| N | V | . | . | H | . | Z | C |
SUBW (Subtract Word) is an SPC700 command that subtracts a 16-bit direct page word from YA. The difference is stored in YA.
Syntax
SUBW YA, dp
See Also
External Links
- Official Super Nintendo development manual on SUBW: Table C-12 in Appendix C-8 of Book I
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L587