GETC (Super FX): Difference between revisions

Latest revision as of 21:08, 16 July 2024


Basic Info
Addressing Mode	Opcode	Length	ROM Speed	RAM Speed	Cache Speed
Implied (type 1)	DF	1 byte	3 to 10 cycles	3 to 9 cycles	1 to 6 cycles


Flags Affected
B	ALT1	ALT2	O/V	S	CY	Z
0	0	0	.	.	.	.

GETC (Get Color) is a Super FX instruction that loads a color into the color register from the ROM buffer.

The reason the cycle times can vary is because of the ROM buffer. The ALT0 state is restored.

Syntax

GETC

Example

Let:

(ROM buffer) = 4bh

After GETC is executed:

color reg = 4bh

External Links

Official Super Nintendo development manual on GETC: paragraph 9.39 on page 2-9-57 of Book II
subparagraph 8.1.2 SET COLOR (COLOR, GETC) on page 2-8-4, lbid.

@@ Line 1: / Line 1: @@
-'''GETC''' is a [[Super FX]] instruction that loads a color into the [[color register]].
+{| 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)
 |DF
 |1 byte
@@ 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 37: / Line 37: @@
 |}
-=== See Also ===
+'''GETC''' (Get Color) is a [[Super FX]] instruction that loads a color into the [[color register]] from the [[ROM buffer]].
-* [[GETB]]
-=== External Links ===
+The reason the cycle times can vary is because of the [[ROM buffer]].  The [[ALT0]] state is restored.
-* Official Nintendo documentation on GETC: [https://archive.org/details/SNESDevManual/book2/page/n213 Page 2-9-57 of Book II]
+==== Syntax ====
+<pre>
+GETC
+</pre>
+==== Example ====
+Let:
+ (ROM buffer) = 4bh
+After GETC is executed:
+ color reg = 4bh
+=== See Also ===
+* [[GETB]]
+* [[GETBL]]
+* [[GETBH]]
+* [[GETBS]]
+* [[COLOR]]
+* [[Bitmap Emulation]]
+=== External Links ===
+* Official Super Nintendo development manual on GETC: paragraph 9.39 on [https://archive.org/details/SNESDevManual/book2/page/n213 page 2-9-57 of Book II]
+* subparagraph 8.1.2 SET COLOR (COLOR, GETC) on [https://archive.org/details/SNESDevManual/book2/page/n143 page 2-8-4], lbid.
 [[Category:ASM]]
 [[Category:Super FX]]
 [[Category:Data Transfer Instructions]]
+[[Category:One-byte Instructions]]