Zilog Z08470 - Manual (Page 185)

UM008007-0715 Z80 Instruction Description
Z80 CPU
User Manual
173
CPL
Operation
A ← A
Op Code
CPL
Operands
None.
Description
The contents of the Accumulator (Register A) are inverted (one’s complement).
Condition Bits Affected
S is not affected.
Z is not affected.
H is set.
P/V is not affected.
N is set.
C is not affected.
Example
If the Accumulator contains 1011 0100 , then upon the execution of a CPL instruction, the
Accumulator contains 0100 1011 .
M Cycles T States 4 MHz E.T.
1 4 1.00
0 0 0 1 1 1 1 1 2F