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CACHE (Super FX): Difference between revisions
From SnesLab
(see also cache ram) |
(→External Links: cautions) |
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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]] (type 2) | |||
|02 | |02 | ||
|1 byte | |1 byte | ||
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!colspan="9"|Flags Affected | !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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|} | |} | ||
'''CACHE''' is a [[Super FX]] instruction that might reset all cache flags. | '''CACHE''' is a [[Super FX]] instruction that might reset all cache flags. If the [[cache base register]] is equal to R<sub>15</sub> & 0fff0h, nothing happens. Otherwise, set the cache base register to R<sub>15</sub> & 0fff0h and reset all cache flags. | ||
The [[ALT0]] state is restored. | |||
==== Syntax ==== | |||
<pre> | |||
CACHE | |||
</pre> | |||
=== See Also === | === See Also === | ||
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=== External Links === | === External Links === | ||
* Official Nintendo documentation on CACHE: [https://archive.org/details/SNESDevManual/book2/page/n194 | * Official Nintendo documentation on CACHE: 9.27 on [https://archive.org/details/SNESDevManual/book2/page/n194 page 2-9-38 of Book II] | ||
* cautions for 7.1.1 on [https://archive.org/details/SNESDevManual/book2/page/n135 page 2-7-1 of Book II] | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Latest revision as of 01:47, 12 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied (type 2) | 02 | 1 byte | 3 or 4 cycles | 3 or 4 cycles | 1 cycle | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | . | . | ||
CACHE is a Super FX instruction that might reset all cache flags. If the cache base register is equal to R15 & 0fff0h, nothing happens. Otherwise, set the cache base register to R15 & 0fff0h and reset all cache flags.
The ALT0 state is restored.
Syntax
CACHE
See Also
External Links
- Official Nintendo documentation on CACHE: 9.27 on page 2-9-38 of Book II
- cautions for 7.1.1 on page 2-7-1 of Book II