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SM (Super FX): Difference between revisions
From SnesLab
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The number of cycles varies because of the [[RAM buffer]]. | The number of cycles varies because of the [[RAM buffer]]. | ||
The [[ALT0]] state is restored. | |||
==== Syntax ==== | ==== Syntax ==== | ||
Revision as of 00:24, 13 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| 3EFnxxxx | 4 bytes | 12 to 17 cycles | 16 to 20 cycles | 4 to 9 cycles | |||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | . | . | ||
SM is a Super FX instruction that stores a value to the Game Pak.
The number of cycles varies because of the RAM buffer.
The ALT0 state is restored.
Syntax
SM (xx), Rn
Example
Let:
R4 = 438ch RAMBR = 70h
After executing SM (0b492h), R4:
(70:b492h) = 8ch (70:b493h) = 43h
See Also
External Links
- Official Nintendo documentation on SM: 9.81 on page 2-9-112 of Book II