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CMODE (Super FX): Difference between revisions
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{| class="wikitable" style="float:right;clear:right;width: | |||
!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
|+ | |+ | ||
|'''Addressing Mode''' | |||
|'''Opcode''' | |'''Opcode''' | ||
|'''Length''' | |'''Length''' | ||
| Line 10: | Line 9: | ||
|'''Cache Speed''' | |'''Cache Speed''' | ||
|+ | |+ | ||
|[[Implied]] (type 1) | |||
|3D4E | |3D4E | ||
|2 bytes | |2 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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|} | |} | ||
{| class="wikitable" style="float:right;clear:right;width: | {| class="wikitable" style="float:right;clear:right;width:45%" | ||
!colspan="9"|Color/Plot flags | !colspan="9"|Color/Plot flags | ||
|+ | |+ | ||
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|Bit 4 of src | |Bit 4 of src | ||
|} | |} | ||
'''CMODE''' is a [[Super FX]] instruction that specifies [[execution modes]]. It sets plot and color related flags based on the low 5 bits of the [[source register]]. | |||
The [[ALT0]] state is restored. | |||
==== Syntax ==== | |||
<pre> | |||
CMODE | |||
</pre> | |||
==== Example ==== | |||
Let: | |||
S<sub>reg</sub> : R<sub>0</sub> | |||
R<sub>0</sub> = 0002h | |||
After CMODE runs, the transparency and dither modes are set. | |||
=== See Also === | |||
* [[Transparency Flag]] | |||
* [[Dither Flag]] | |||
* [[ALT1]] | |||
* [[Plot Options Register]] | |||
* [[COLOR]] | |||
=== External Links === | === External Links === | ||
* Official Nintendo documentation on CMODE: [https://archive.org/details/SNESDevManual/book2/page/n195 Page 2-9-39 of Book II] | * Official Nintendo documentation on CMODE: 9.28 on [https://archive.org/details/SNESDevManual/book2/page/n195 Page 2-9-39 of Book II] | ||
* example: [https://archive.org/details/SNESDevManual/book2/page/n196 Page 2-9-40], lbid. | |||
* 8.1.4 Plot Function and CMODE on page 2-8-9, lbid. | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Super FX]] | [[Category:Super FX]] | ||
[[Category:Plot-related Instructions]] | [[Category:Plot-related Instructions]] | ||
[[Category:Two-byte Instructions]] | |||
Latest revision as of 18:12, 16 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied (type 1) | 3D4E | 2 bytes | 6 cycles | 6 cycles | 2 cycle | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | . | . | ||
| Color/Plot flags | ||||||||
|---|---|---|---|---|---|---|---|---|
| Plot Transparent | Plot Dither | Color Src High | Color Frz High | Object Mode | ||||
| Bit 0 of src | Bit 1 of src | Bit 2 of src | Bit 3 of src | Bit 4 of src | ||||
CMODE is a Super FX instruction that specifies execution modes. It sets plot and color related flags based on the low 5 bits of the source register.
The ALT0 state is restored.
Syntax
CMODE
Example
Let:
Sreg : R0 R0 = 0002h
After CMODE runs, the transparency and dither modes are set.
See Also
External Links
- Official Nintendo documentation on CMODE: 9.28 on Page 2-9-39 of Book II
- example: Page 2-9-40, lbid.
- 8.1.4 Plot Function and CMODE on page 2-8-9, lbid.