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MOVW (SPC700): Difference between revisions
From SnesLab
(consolidate tables) |
(both are direct page) |
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| Line 9: | Line 9: | ||
|+ | |+ | ||
|to YA | |to YA | ||
| | |direct page | ||
|BA | |BA | ||
|2 bytes | |2 bytes | ||
| Line 15: | Line 15: | ||
|+ | |+ | ||
|from YA | |from YA | ||
| | |direct page | ||
|DA | |DA | ||
|2 bytes | |2 bytes | ||
Revision as of 18:39, 22 July 2023
| Basic Info | ||||
|---|---|---|---|---|
| Direction | Addressing Mode | Opcode | Length | Speed |
| to YA | direct page | BA | 2 bytes | 5 cycles |
| from YA | direct page | DA | 2 bytes | 4 cycles |
| Flags Clobbered | ||||||||
|---|---|---|---|---|---|---|---|---|
| Direction | N | V | P | B | H | I | Z | C |
| to YA | . | . | . | . | . | |||
| from YA | . | . | . | . | . | . | . | . |
MOVW (Move Word) is an SPC700 instruction that moves a 16-bit ARAM value to or from the YA register. There are no variations of MOVW that do not operate on YA.
Example
From the IPL ROM,
MOVW YA, $F6 ; load the byte at ARAM location $F6 into A and the byte at $F7 into Y MOVW $00, YA ; store the value in Y to ARAM location $01 and the value in A to $00
See Also
External Links
- Official Super Nintendo development manual on MOVW: Appendix C-8 of Book I