Instruction Reference Manual
29
Description
Tests bit b (any of the bits 0, 1, 2, 3, 4, 5, 6, or 7) of the byte in r (any of the registers A, B, C, D, E, H, or L).
The Z flag is set if the tested bit is 0, reset if the bit is 1.
BIT
b
,
r
Opcode
Instruction
Clocks
Operation
b,r
A
B
C
D
E
H
L
BIT b,r
4(2,2)
r & bit
CB (0)
47
40
41
42
43
44
45
CB (1)
4F
48
49
4A
4B
4C
4D
CB (2)
57
50
51
52
53
54
55
CB (3)
5F
58
59
5A
5B
5C
5D
CB (4)
67
60
61
62
63
64
65
CB (5)
6F
68
69
6A
6B
6C
6D
CB (6)
77
70
71
72
73
74
75
CB (7)
7F
78
79
7A
7B
7C
7D
Flags
ALTD
I/O
S
Z
L/V
C
F
R
SP
S
D
-
•
-
-
•
Содержание 2000
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