Nintendo GAME BOY Programming Manual page 105

Examples: When A = 5Ah, (HL) = 0Fh,
OR A ;
OR 3 ;
OR (HL) ; A ← 5Fh, Z ← 0
XOR
Takes the logical exclusive-OR for each bit of the contents of operand s and register A. and stores the
results in register A. r, n, and (HL) are used for operand s.
Examples: When A = FFh and (HL) = 8Ah,
XOR A ; A ← 00h, Z ← 1
XOR 0x0F ; A ← F0h, Z ← 0
XOR (HL) ; A ← 75h, Z ← 0
CP s
Compares the contents of operand s and register A and sets the flag if they are equal.
r, n, and (HL) are used for operand s.
OR r
OR n
OR (HL)
A ← 5Ah, Z ← 0
A ← 5Bh, Z ← 0
A ⊕ s
s
XOR r
XOR n
XOR (HL)
A  s
CYCL 7 6 5 4 3 2
1
10 110
2
11 110 110
n
2
10 110 110
CY H
0 0 0
CYCL 7 6 5 4 3 2
1 10 101 r
2 11 101 110
n
2 10 101 110
CY H
* * 1
105
Chapter 4: CPU Instruction Set
1 0
r
N Z CYCL 7 6 5 4 3
* -- --
1 0
N Z CYCL 7 6 5 4 3
* -- --
2 1 0
-- --
2 1 0
-- --