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ADDW (SPC700): Difference between revisions
From SnesLab
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|[[Negative Flag|N]] | |[[Negative Flag|N]] | ||
|[[Overflow Flag|V]] | |[[Overflow Flag|V]] | ||
|P | |[[Direct Page Flag|P]] | ||
|B | |[[Break Flag|B]] | ||
|H | |[[Half-Carry Flag|H]] | ||
|I | |[[Interrupt Enable Flag|I]] | ||
|[[Zero Flag|Z]] | |[[Zero Flag|Z]] | ||
|[[Carry Flag|C]] | |[[Carry Flag|C]] | ||
|+ | |+ | ||
| | |N | ||
| | |V | ||
|. | |. | ||
|. | |. | ||
| | |H | ||
|. | |. | ||
| | |Z | ||
| | |C | ||
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'''ADDW''' (Add Word) is an [[SPC700]] command that adds a 16-bit [[direct page]] value to [[YA]]. | '''ADDW''' (Add Word) is an [[SPC700]] command that adds a 16-bit [[direct page]] value to [[YA]]. The sum is stored in YA. | ||
==== Syntax ==== | |||
<pre> | |||
ADDW YA, dp | |||
</pre> | |||
=== See Also === | === See Also === | ||
| Line 45: | Line 50: | ||
=== External Links === | === External Links === | ||
* Official Super Nintendo development manual on ADDW: Table C-12 in [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I] | * Official Super Nintendo development manual on ADDW: 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/8fabc9764c33a7ae2520a76d80ed7220bb939f12/spc700.txt#L317 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:16-bit Operation Commands]] | [[Category:16-bit Operation Commands]] | ||
[[Category:Two-byte Instructions]] | |||
Latest revision as of 13:50, 30 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Direct Page | 7A | 2 bytes | 5 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| N | V | . | . | H | . | Z | C |
ADDW (Add Word) is an SPC700 command that adds a 16-bit direct page value to YA. The sum is stored in YA.
Syntax
ADDW YA, dp
See Also
External Links
- Official Super Nintendo development manual on ADDW: Table C-12 in Appendix C-8 of Book I
- anomie: https://github.com/yupferris/TasmShiz/blob/8fabc9764c33a7ae2520a76d80ed7220bb939f12/spc700.txt#L317