SUBW (SPC700): Difference between revisions

Latest revision as of 11:54, 28 November 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
Direct Page	9A	2 bytes	5 cycles


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

SUBW (Subtract Word) is an SPC700 command that subtracts a 16-bit direct page word from YA.

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

@@ Line 1: / Line 1: @@
-'''SUBW''' (Subtract Word) is an [[SPC700]] command that stores a difference in [[YA]].
+{| class="wikitable" style="float:right;clear:right;width:40%"
-{| class="wikitable" style="float:right;clear:right;width:30%"
 !colspan="8"|Basic Info
 |+
@@ Line 9: / Line 7: @@
 |'''Speed'''
 |+
-|direct page
+|[[Direct Page Addressing | Direct Page]]
 |9A
 |2 bytes
@@ Line 16: / Line 14: @@
 {| class="wikitable" style="float:right;clear:right;width:30%"
-!colspan="8"|Flags Clobbered
+!colspan="8"|Flags Affected
 |+
-|N
+|[[Negative Flag|N]]
-|V
+|[[Overflow Flag|V]]
-|P
+|[[Direct Page Flag|P]]
-|B
+|[[Break Flag|B]]
-|H
+|[[Half-Carry Flag|H]]
-|I
+|[[Interrupt Enable Flag|I]]
-|Z
+|[[Zero Flag|Z]]
-|C
+|[[Carry Flag|C]]
 |+
 |
@@ Line 36: / Line 34: @@
 |
 |}
+'''SUBW''' (Subtract Word) is an [[SPC700]] command that subtracts a 16-bit [[direct page]] word from [[YA]].
 === See Also ===
 * [[ADDW]]
+* [[CMPW]]
+* [[MOVW]]
+* [[SBC (SPC700)]]
 === External Links ===
-* Official Super Nintendo development manual on SUBW: [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I]
+* Official Super Nintendo development manual on SUBW: 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]]