TXA: Difference between revisions

Revision as of 06:22, 16 July 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
implied	8A	1 byte	2 cycles


Flags Clobbered
N	V	M	X	D	I	Z	C
	.	.	.	.	.		.

TXA is a 65x instruction that transfers the value of the X index register to the accumulator.


Instruction Behavior
	8-bit accumulator (m=1)	16-bit accumulator (m=0)
8-bit index registers (x=1)	8 bits are transferred	8 bits are transferred to the low byte of accumulator and high byte of the accumulator is zeroed
16-bit index registers (x=0)	8 bits are transferred	16 bits are transferred

@@ Line 1: / Line 1: @@
-'''TXA''' is a 65x instruction that transfers the value of the [[X index register]] to the [[accumulator]].
 {| class="wikitable" style="float:right;clear:right;width:30%"
 !colspan="8"|Basic Info
@@ Line 36: / Line 34: @@
 |.
 |}
+'''TXA''' is a 65x instruction that transfers the value of the [[X index register]] to the [[accumulator]].
 {| class="wikitable" style="float:right;clear:right;width:40%"