ZiLOG eZ80 User Manual

eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
251
OR A, ir
Logical OR
Operation
A ← A OR ir
Description
The rr operand is any of the 8-bit registers IXH, IXL, IYH, or IYL. The rr operand is log-
ically ORed to the contents of the accumulator, A. The result is written to the accumulator.
Condition Bits Affected
Attributes
S Set if result is negative; reset otherwise.
Z Set if result is 0; reset otherwise.
H Reset.
P/V Set if parity is even; reset otherwise.
N Reset.
C Reset.
Mnemonic Operand ADL Mode Cycle Opcode (hex)
OR A, IXH X 2 DD B4
OR A, IXL X 2 DD B5
OR A, IYH X 2 FD B4
OR A, IYL X 2 FD B5

ZiLOG eZ80 Specifications

General

Brand	ZiLOG
Model	eZ80
Category	Computer Hardware
Language	English