Zilog EZ80F916 - Manual (Page 261)

eZ80
®
CPU
User Manual
UM007715-0415 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)
X 4 DD, B6, dd
OR.S
A, (IX+d)
1 5 52, DD, B6, dd
OR.L
A, (IX+d)
0 5 49, DD, B6, dd
OR
A, (IY+d)
X 4 FD, B6, dd
OR.S
A, (IY+d)
1 5 52, FD, B6, dd
OR.L
A, (IY+d)
0 5 49, FD, B6, dd