CMODE (Super FX): Difference between revisions

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:

S_reg : R₀
R₀ = 0002h

After CMODE runs, the transparency and dither modes are set.

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.

@@ Line 1: / Line 1: @@
-'''CMODE''' is a [[Super FX]] instruction that specifies [[execution modes]].
+{| class="wikitable" style="float:right;clear:right;width:50%"
-{| class="wikitable" style="float:right;clear:right;width:40%"
 !colspan="8"|Basic Info
 |+
+|'''Addressing Mode'''
 |'''Opcode'''
 |'''Length'''
@@ Line 10: / Line 9: @@
 |'''Cache Speed'''
 |+
+|[[Implied]] (type 1)
 |3D4E
 |2 bytes
@@ Line 18: / Line 18: @@
 {| class="wikitable" style="float:right;clear:right;width:30%"
-!colspan="9"|Flags Clobbered
+!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
@@ Line 36: / Line 36: @@
 |.
 |}
+{| class="wikitable" style="float:right;clear:right;width:45%"
+!colspan="9"|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 ====
+<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 ===
-* Official Nintendo documentation on CMODE: https://archive.org/details/SNESDevManual/book2/page/n195
+* 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:Super FX]]
 [[Category:Plot-related Instructions]]
+[[Category:Two-byte Instructions]]