MOVW (SPC700): Difference between revisions

Revision as of 20:02, 13 July 2023


Basic Info (to YA)
Addressing Mode	Opcode	Length	Speed
	BA	2 bytes	5 cycles


Flags Clobbered (to YA)
N	V	P	B	H	I	Z	C
	.	.	.	.	.


Basic Info (from YA)
Addressing Mode	Opcode	Length	Speed
	DA	2 bytes	4 cycles


Flags Clobbered (from YA)
N	V	P	B	H	I	Z	C
.	.	.	.	.	.	.	.

MOVW (Move Word) is an SPC700 instruction that moves a 16-bit ARAM value to or from the YA register. There are no variations of MOVW that do not operate on YA.

Example

From the IPL ROM,

MOVW YA, $F6	; load the byte at ARAM location $F6 into A and the byte at $F7 into Y
MOVW $00, YA	; store the value in Y to ARAM location $01 and the value in A to $00

External Links

Official Super Nintendo development manual on MOVW: Appendix C-8 of Book I

@@ Line 1: / Line 1: @@
-'''MOVW''' (Move Word) is an [[SPC700]] instruction that moves a 16-bit [[ARAM]] value to or from the [[YA]] register.  There are no variations of MOVW that do not operate on YA.
-=== Example ===
-From the [[IPL ROM]],
-<pre>
-MOVW YA, $F6	; load the byte at ARAM location $F6 into A and the byte at $F7 into Y
-MOVW $00, YA	; store the value in Y to ARAM location $01 and the value in A to $00
-</pre>
 {| class="wikitable" style="float:right;clear:right;width:30%"
 !colspan="8"|Basic Info (to YA)
@@ Line 81: / Line 70: @@
 |.
 |}
+'''MOVW''' (Move Word) is an [[SPC700]] instruction that moves a 16-bit [[ARAM]] value to or from the [[YA]] register.  There are no variations of MOVW that do not operate on YA.
+=== Example ===
+From the [[IPL ROM]],
+<pre>
+MOVW YA, $F6	; load the byte at ARAM location $F6 into A and the byte at $F7 into Y
+MOVW $00, YA	; store the value in Y to ARAM location $01 and the value in A to $00
+</pre>
 === See Also ===