XBA: Difference between revisions

Revision as of 17:08, 13 July 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
implied	EB	1 byte	3 cycles


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

XBA is an instruction that exchanges the high byte (B) and low byte (typically called A) of the C accumulator. It works even in 6502 emulation mode. In 65816 native mode, its mnemonic is still "XBA" even when the accumulator is 16-bits wide.

External Links

Eyes & Lichty page on XBA: https://archive.org/details/0893037893ProgrammingThe65816/page/n550
Labiak page on XBA: https://archive.org/details/Programming_the_65816/page/n214
snes9x implementation of XBA: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L3261
undisbeliever on XBA: https://undisbeliever.net/snesdev/65816-opcodes.html#xba-exchange-the-b-and-a-accumulators

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-'''XBA''' is an instruction that exchanges the high byte (B) and low byte (typically called A) of the [[C accumulator]].  It works even in [[6502 emulation mode]].  In [[65816 native mode]], its mnemonic is still "XBA" even when the accumulator is 16-bits wide.
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+'''XBA''' is an instruction that exchanges the high byte (B) and low byte (typically called A) of the [[C accumulator]].  It works even in [[6502 emulation mode]].  In [[65816 native mode]], its mnemonic is still "XBA" even when the accumulator is 16-bits wide.
 === External Links ===