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SM (Super FX): Difference between revisions
From SnesLab
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'''SM''' is a [[Super FX]] instruction that stores a value to the [[Game Pak]]. | '''SM''' is a [[Super FX]] instruction that stores a value to the [[Game Pak]]. The bank must be specified with [[RAMB]]. | ||
The number of cycles varies because of the [[RAM buffer]]. | The number of cycles varies because of the [[RAM buffer]]. | ||
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=== See Also === | === See Also === | ||
* [[SMS]] | * [[SMS]] | ||
* [[ALT2]] | * [[ALT2]] | ||
Revision as of 05:15, 16 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied Indirect | 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 bank must be specified with RAMB.
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