ZiLOG eZ80 User Manual

eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
119
CP A, ir
Compare with Accumulator
Operation
A – ir
Description
The ir operand is any of the 8-bit registers IXH, IXL, IYH, or IYL. The ir operand is com-
pared with (subtracted from) the contents of the accumulator, A. The execution of this
instruction does not affect the contents of the accumulator or the
ir operand.
Condition Bits Affected
Attributes
S Set if result is negative; reset otherwise.
Z Set if A = ir; reset otherwise.
H Set if borrow from bit 4; reset otherwise.
P/V Set if overflow: reset otherwise.
N Set.
C Set if borrow; reset otherwise.
Mnemonic Operand ADL Mode Cycle Opcode (hex)
CP A,IXH X 2 DD, BC
CP A,IXL X 2 DD, BD
CP A,IYH X 2 FD, BC
CP A,IYL X 2 FD, BD

ZiLOG eZ80 Specifications

General

Brand	ZiLOG
Model	eZ80
Category	Computer Hardware
Language	English