EOR: Difference between revisions

Revision as of 20:42, 17 May 2023

EOR is a 65x instruction that performs an exclusive or.


Basic Info
Addressing Mode	Opcode	Length	Speed
immediate	49	2 bytes	2 cycles
absolute	4D	3 bytes	4 cycles
absolute long	4F	4 bytes	5 cycles
direct page	45	2 bytes	3 cycles
direct page indirect	52	2 bytes	5 cycles
direct page indirect long	47	2 bytes	6 cycles
absolute indexed by X	5D	3 bytes	4 cycles
absolute long indexed by X	5F	4 bytes	5 cycles
absolute indexed by Y	59	3 bytes	4 cycles
direct page indexed by X	55	2 bytes	4 cycles
direct page indexed indirect by X	41	2 bytes	6 cycles
direct page indirect indexed by Y	51	2 bytes	5 cycles
direct page indirect long indexed by Y	57	2 bytes	6 cycles
stack relative	43	2 bytes	4 cycles
stack relative indirect indexed by Y	53	2 bytes	7 cycles


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

@@ Line 116: / Line 116: @@
 * [[Carr]] page on EOR: https://archive.org/details/6502UsersManual/page/n272
 * [[Leventhal]] page on EOR: https://archive.org/details/6502-assembly-language-programming/page/n112
+* snes9x implementation of EOR: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L533
 [[Category:ASM]]
 [[Category:Group One Instructions]]
 [[Category:Inherited from 6502]]