MOVW (SPC700): Difference between revisions

Revision as of 02:43, 22 June 2023

MOVW is an SPC700 instruction that moves a 16-bit ARAM value to or from the YA register.

Example

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


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
.	.	.	.	.	.	.	.

External Links

Official Nintendo documentation on MOVW: https://archive.org/details/SNESDevManual/book1/page/n233

@@ Line 1: / Line 1: @@
-'''MOVW''' is an [[SPC700]] instruction that moves a value to or from [[YA]].
+'''MOVW''' is an [[SPC700]] instruction that moves a 16-bit [[ARAM]] value to or from the [[YA]] register.
+=== 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%"

Revision as of 02:43, 22 June 2023

Example

See Also

External Links