Zilog Z08470 - Manual (Page 257)

UM008007-0715 Z80 Instruction Description
Z80 CPU
User Manual
245
BIT b, (IX+d)
Operation
Z ← (IX+d)b
Op Code
BIT
Operands
b, (IX+d)
Description
This instruction tests bit b in the memory location specified by the contents of register pair
IX combined with the two’s complement displacement d and sets the Z flag accordingly.
In the assembled object code, operand b is specified as follows:
Bit Tested b
0 000
1 001
2 010
3 011
4 100
5 101
6 110
7 111
M Cycles T States 4 MHz E.T.
5 20 (4, 4, 3, 5, 4) 5.00
1 1 1 0 1 1 0 1 DD
1 1 0 1 1 0 0 1 CB
d
0 1 b 1 1 0