eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
252
OR A, (IX/Y+d)
Logical OR
Operation
A ← A OR (IX/Y+d)
Description
The (
IX/Y
+
d
) operand is an 8-bit value at the memory location specified by the contents
of the Index Register, IX or IY, added to the two’s-complement displacement
d
. This 8-bit
value is logically 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, (IX+d)
X4
DD, B6, dd
OR.S A, (IX+d)
15
52, DD, B6, dd
OR.L A, (IX+d)
05
49, DD, B6, dd
OR A, (IY+d)
X4
FD, B6, dd
OR.S A, (IY+d)
15
52, FD, B6, dd
OR.L A, (IY+d)
05
49, FD, B6, dd
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