Bit b, (hl) – Zilog Z08470 User Manual
Page 255
UM008007-0715
Z80 Instruction Description
Z80 CPU
User Manual
243
BIT b, (HL)
Operation
Z ← (HL)b
Op Code
BIT
Operands
b, (HL)
Description
This instruction tests bit b in the memory location specified by the contents of the HL reg-
ister pair and sets the Z flag accordingly. In the assembled object code, operand b is speci-
fied as follows:
Condition Bits Affected
S is unknown.
Bit Tested
b
0
000
1
001
2
010
3
011
4
100
5
101
6
110
1
111
M Cycles
T States
4 MHz E.T.
3
12 (4, 4, 4) 4
3.00
1
1
0
1
1
0
0
1
CB
0
1
b
1
0
1