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SM (Super FX): Difference between revisions
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!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
|+ | |+ | ||
|'''Addressing Mode''' | |||
|'''Opcode''' | |'''Opcode''' | ||
|'''Length''' | |'''Length''' | ||
| Line 8: | Line 9: | ||
|'''Cache Speed''' | |'''Cache Speed''' | ||
|+ | |+ | ||
|[[Implied Indirect]] | |||
|3EFnxxxx | |3EFnxxxx | ||
|4 bytes | |4 bytes | ||
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{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!colspan="9"|Flags | !colspan="9"|Flags Affected | ||
|+ | |+ | ||
|B | |[[B Flag|B]] | ||
|[[ALT1]] | |[[ALT1]] | ||
|[[ALT2]] | |[[ALT2]] | ||
|[[O/V]] | |[[O/V]] | ||
|S | |[[Sign Flag|S]] | ||
|[[CY]] | |[[CY]] | ||
|Z | |[[Zero Flag|Z]] | ||
|+ | |+ | ||
|0 | |0 | ||
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|} | |} | ||
'''SM''' is a [[Super FX]] instruction that stores a value to the [[Game Pak]]. | '''SM''' (Store to raM) 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 ==== | |||
<pre> | |||
SM (xx), Rn | |||
</pre> | |||
==== Example ==== | |||
Let: | |||
R<sub>4</sub> = 438ch | |||
RAMBR = 70h | |||
After executing SM (0b492h), R<sub>4</sub>: | |||
(70:b492h) = 8ch | |||
(70:b493h) = 43h | |||
=== See Also === | === See Also === | ||
* [[SMS]] | * [[SMS]] | ||
* [[LM (Super FX)|LM]] | |||
* [[LMS]] | |||
* [[ALT2]] | |||
=== External Links === | === External Links === | ||
* Official Nintendo documentation on SM: [https://archive.org/details/SNESDevManual/book2/page/n268 | * Official Nintendo documentation on SM: 9.81 on [https://archive.org/details/SNESDevManual/book2/page/n268 page 2-9-112 of Book II] | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Super FX]] | [[Category:Super FX]] | ||
[[Category:Data Transfer Instructions]] | [[Category:Data Transfer Instructions]] | ||
Latest revision as of 05:46, 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 (Store to raM) 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