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SMS (Super FX): Difference between revisions
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!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
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|'''Addressing Mode''' | |||
|'''Opcode''' | |'''Opcode''' | ||
|'''Length''' | |'''Length''' | ||
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|'''Cache Speed''' | |'''Cache Speed''' | ||
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|[[Implied Indirect]] | |||
|3EAnkk | |3EAnkk | ||
|3 bytes | |3 bytes | ||
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|[[Sign Flag|S]] | |[[Sign Flag|S]] | ||
|[[CY]] | |[[CY]] | ||
|Z | |[[Zero Flag|Z]] | ||
|+ | |+ | ||
|0 | |0 | ||
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'''SMS''' is a [[Super FX]] instruction that stores a value to the [[Game Pak]]. | '''SMS''' (Store to raM Short address) is a [[Super FX]] instruction that stores a value to the [[Game Pak]]. The bank must be specified with [[RAMB]]. | ||
The selectable RAM address must be an even number between 0 and 510. | The selectable RAM address must be an even number between 0 and 510. | ||
The number of cycles varies because of the [[RAM buffer]]. | |||
The [[ALT0]] state is restored. | |||
==== Syntax ==== | |||
<pre> | |||
SMS (yy), Rn | |||
</pre> | |||
==== Example ==== | |||
Let: | |||
R<sub>11</sub> = abcdh | |||
RAMBR = 71h | |||
After executing this program: | |||
<pre> | |||
Syntax Opcode | |||
SMS (194h), R11 3e ab ca | |||
</pre> | |||
We have: | |||
(71:0194h) = cdh | |||
(71:0195h) = abh | |||
=== See Also === | === See Also === | ||
* [[SM]] | * [[SM]] | ||
* [[ALT2]] | |||
* [[LMS]] | |||
* [[LM]] | |||
=== External Links === | === External Links === | ||
* Official Nintendo documentation on SMS: [https://archive.org/details/SNESDevManual/book2/page/n269 | * Official Nintendo documentation on SMS: 9.82 on [https://archive.org/details/SNESDevManual/book2/page/n269 page 2-9-113 of Book II] | ||
* example: [https://archive.org/details/SNESDevManual/book2/page/n270 Page 2-9-114], lbid. | * example: [https://archive.org/details/SNESDevManual/book2/page/n270 Page 2-9-114], lbid. | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Super FX]] | [[Category:Super FX]] | ||
[[Category:Data Transfer Instructions]] | [[Category:Data Transfer Instructions]] | ||
Latest revision as of 05:45, 16 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied Indirect | 3EAnkk | 3 bytes | 9 to 14 cycles | 13 to 17 cycles | 3 to 8 cycles | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | . | . | ||
SMS (Store to raM Short address) is a Super FX instruction that stores a value to the Game Pak. The bank must be specified with RAMB.
The selectable RAM address must be an even number between 0 and 510.
The number of cycles varies because of the RAM buffer.
The ALT0 state is restored.
Syntax
SMS (yy), Rn
Example
Let:
R11 = abcdh RAMBR = 71h
After executing this program:
Syntax Opcode SMS (194h), R11 3e ab ca
We have:
(71:0194h) = cdh (71:0195h) = abh
See Also
External Links
- Official Nintendo documentation on SMS: 9.82 on page 2-9-113 of Book II
- example: Page 2-9-114, lbid.