xor

The Language Reference - Instructions - xor

The command a: xor src performs a bitwise XOR (exclusive OR) of the accumulator with contents of source argument src. The zero and negative p-flags are modified accordingly.

Usage	Opcode, 6502 mnemonic
a: xor #immediate	0x49, xor
a: xor @direct	0x4D, xor
a: xor @direct[x]	0x5D, xor
a: xor @direct[y]	0x59, xor
a: xor @zp	0x45, xor
a: xor @zp[x]	0x55, xor
a: xor @[zp[x]]	0x41, xor
a: xor @[zp][y]	0x51, xor

See also: or, and, not