ALT3: Difference between revisions

Latest revision as of 00:54, 22 July 2024


Basic Info
Addressing Mode	Opcode	Length	ROM Speed	RAM Speed	Cache Speed
Implied (type 2)	3F	1 byte	3 cycles	3 cycles	1 cycle


Flags Affected
B	ALT1	ALT2	O/V	S	CY	Z
.	1	1	.	.	.	.

ALT3 is a Super FX flag prefix instruction that sets both the ALT1 and ALT2 flags.

Unlike ALT1 and ALT2 however, ALT3 is only an instruction and not also the name of a flag itself.

ALT3

The following instructions require ALT3:

@@ Line 26: / Line 26: @@
 |[[Sign Flag|S]]
 |[[CY]]
-|Z
+|[[Zero Flag|Z]]
 |+
 |.
@@ Line 40: / Line 40: @@
 Unlike ALT1 and ALT2 however, ALT3 is only an instruction and not also the name of a flag itself.
+==== Syntax ====
+<pre>
+ALT3
+</pre>
+The following instructions require ALT3:
+* [[ADC (Super FX)|ADC]] #n
+* [[BIC]] #n
+* [[CMP (Super FX)|CMP]] R<sub>n</sub>
+* [[GETBS]]
+* [[ROMB]]
+* [[XOR]] #n
 ==== See Also ====
 * [[ALT0]]
+* [[Super_FX_Opcode_Matrices#ALT1_=_1,_ALT2_=_1]]
 === External Links ===
 * Official Nintendo documentation on ALT3: 9.10 on [https://archive.org/details/SNESDevManual/book2/page/n165 page 2-9-9 of Book II]
+* Table 2-4-2 on [https://archive.org/details/SNESDevManual/book2/page/n110 page 2-4-4], lbid.
+* https://en.wikibooks.org/wiki/Super_NES_Programming/Super_FX_tutorial#Instruction_Set_Table
 [[Category:ASM]]