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.

CMODE

Let:

S_reg : R₀
R₀ = 0002h

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

@@ Line 26: / Line 26: @@
 |[[Sign Flag|S]]
 |[[CY]]
-|Z
+|[[Zero Flag|Z]]
 |+
 |0
@@ Line 54: / Line 54: @@
 '''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 ===
@@ Line 59: / Line 72: @@
 * [[Dither Flag]]
 * [[ALT1]]
+* [[Plot Options Register]]
+* [[COLOR]]
 === External Links ===
 * 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]]