XOR = Logical Exclusive-OR
| Hex | Mnemonic | Cycles |
|---|---|---|
| 38 | XOR A, A | 8 |
| 39 | XOR A, B | 8 |
| 3A nn | XOR A, #nn | 8 |
| 3B | XOR A, [HL] | 8 |
| 3C nn | XOR A, [N+#nn] | 12 |
| 3D nn nn | XOR A, [#nnnn] | 16 |
| 3E | XOR A, [X] | 8 |
| 3F | XOR A, [Y] | 8 |
| 9E nn | XOR F, #nn | 12 |
| CE B8 nn | XOR B, #nn | 12 |
| CE B9 nn | XOR L, #nn | 12 |
| CE BA nn | XOR H, #nn | 12 |
| DA nn nn | XOR [N+#nn], #nn | 20 |
| CE 38 ss | XOR A, [X+#ss] | 16 |
| CE 39 ss | XOR A, [Y+#ss] | 16 |
| CE 3A | XOR A, [X+L] | 16 |
| CE 3B | XOR A, [Y+L] | 16 |
| CE 3C | XOR [HL], A | 16 |
| CE 3D nn | XOR [HL], #nn | 20 |
| CE 3E | XOR [HL], [X] | 20 |
| CE 3F | XOR [HL], [Y] | 20 |
Execute
#nn = Immediate unsigned 8-Bits
A = Register A
B = Register B
L = Register L
H = Register H
F = Register F
[N+#nn] = Memory: (I shl 16) or (N shl 8) or #nn
[HL] = Memory: (I shl 16) or HL
[X] = Memory: (XI shl 16) or X
[Y] = Memory: (YI shl 16) or Y
[#nnnn] = Memory: #nnnn
[X+#ss] = Memory: (XI shl 16) or (X + #ss)
[Y+#ss] = Memory: (YI shl 16) or (Y + #ss)
[X+L] = Memory: (XI shl 16) or (X + signed(L))
[Y+L] = Memory: (YI shl 16) or (Y + signed(L))
; XOR Ds, Sc
;
; Ds = Destination
; Sc = Source
Ds = Ds XOR Sc
Description
"8-Bits Destination" Logic XOR (Exclusive-OR) with "8-Bits Source".
Can be used to toggle one or multiple bits.
Bit 0 - Mask $01
Bit 1 - Mask $02
Bit 2 - Mask $04
Bit 3 - Mask $08
Bit 4 - Mask $10
Bit 5 - Mask $20
Bit 6 - Mask $40
Bit 7 - Mask $80
All - Mask $FF
Conditions
Zero: Set when result is 0
Sign: Set when 7th bit of the result is 1
Carry and Overflow remain unchanged
Examples
; A = 0x45
XOR A, $40
; A = 0x05
; F = (Zero=0):(Sign=0)
; B = 0xF0
XOR B, $04
; B = 0xF4
; F = (Zero=0):(Sign=1)
; A = 0xF0
XOR A, $55
; A = 0xA5
; F = (Zero=0):(Sign=1)