XCN (SPC700): Difference between revisions

Latest revision as of 03:14, 25 July 2024


Basic Info
Addressing Mode	Opcode	Length	Speed
Accumulator	9F	1 byte	5 cycles


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

XCN is an SPC700 instruction that swaps the high and low nibbles of the accumulator. Bits 0 to 3 become bits 4 to 7 and vice versa.

XCN
XCN A

@@ Line 1: / Line 1: @@
-'''XCN''' is an [[SPC700]] instruction that swaps the high and low nibbles of the accumulator.
+{| 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'''
 |+
-|implied
+|[[Accumulator Addressing|Accumulator]]
 |9F
 |1 byte
@@ Line 16: / Line 14: @@
 {| class="wikitable" style="float:right;clear:right;width:30%"
-!colspan="8"|Flags Clobbered
+!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]]
 |+
 |N
-|V
-|P
-|B
-|H
-|I
-|Z
-|C
-|+
-|
 |.
 |.
@@ Line 33: / Line 31: @@
 |.
 |.
-|
+|Z
 |.
 |}
+'''XCN''' is an [[SPC700]] instruction that swaps the high and low nibbles of the [[accumulator]].  Bits 0 to 3 become bits 4 to 7 and vice versa.
+==== Syntax ====
+<pre>
+XCN
+XCN A
+</pre>
+[[File:xcn.png]]
 === See Also ===
 * [[XBA]]
+* [[XCE]]
 * [[SWAP]]
+=== External Links ===
+* Official Nintendo documentation on XCN: Table C-10 in [https://archive.org/details/SNESDevManual/book1/page/n232 Appendix C-7 of Book I]
+* anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L609
 [[Category:ASM]]
 [[Category:SPC700]]
 [[Category:Shift Rotation Commands]]