eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
254
OR A, r
Logical OR
Operation
A ← A OR r
Description
The
r
operand is any of the 8-bit CPU registers A, B, C, D, E, H, or L. The
r
operand is
logically ORed to the contents of the accumulator, A. The result is written to the accumu-
lator.
Condition Bits Affected
Attributes
jj identifies the A, B, C, D, E, H, or L register and is assembled into one of the opcodes
indicated in Table 75.
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, r X1jj
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