DECW (SPC700): Difference between revisions

Latest revision as of 11:51, 28 November 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
Direct Page	1A	2 bytes	6 cycles


Flags Affected
N	V	P	B	H	I	Z	C
	.	.	.	.	.		.

DECW is an SPC700 command that decrements a 16-bit word of the direct page.

Official Super Nintendo development manual on DECW: Table C-12 in Appendix C-8 of Book I

@@ Line 1: / Line 1: @@
-'''DECW''' is an [[SPC700]] command that decrements a word.
+{| class="wikitable" style="float:right;clear:right;width:40%"
+!colspan="8"|Basic Info
+|+
+|'''Addressing Mode'''
+|'''Opcode'''
+|'''Length'''
+|'''Speed'''
+|+
+|[[Direct Page Addressing | Direct Page]]
+|1A
+|2 bytes
+|6 cycles
+|}
+{| class="wikitable" style="float:right;clear:right;width:30%"
+!colspan="8"|Flags Affected
+|+
+|[[Negative Flag|N]]
+|[[Overflow Flag|V]]
+|[[Direct Page Flag|P]]
+|[[Break Flag|B]]
+|[[Half-Carry Flag|H]]
+|[[Interrupt Enable Flag|I]]
+|[[Zero Flag|Z]]
+|[[Carry Flag|C]]
+|+
+|
+|.
+|.
+|.
+|.
+|.
+|
+|.
+|}
+'''DECW''' is an [[SPC700]] command that decrements a 16-bit word of the [[direct page]].
+=== See Also ===
+* [[INCW]]
+* [[MOVW]]
+=== External Links ===
+* Official Super Nintendo development manual on DECW: Table C-12 in [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I]
 [[Category:ASM]]
 [[Category:SPC700]]
 [[Category:16-bit Operation Commands]]
+[[Category:Two-byte Instructions]]