TXA: Difference between revisions

Revision as of 04:31, 21 November 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
Implied (type 1)	8A	1 byte	2 cycles


Flags Affected
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 58: / Line 58: @@
 === External Links ===
-* [[Eyes & Lichty]] page on TXA: https://archive.org/details/0893037893ProgrammingThe65816/page/n543
+* [[Eyes & Lichty]] page 517, on TXA: https://archive.org/details/0893037893ProgrammingThe65816/page/n543
 * [[Labiak]] page on TXA: https://archive.org/details/Programming_the_65816/page/n208
 * [[MCS6500 Manual]] page on TXA: https://archive.org/details/mos_microcomputers_programming_manual/page/n118