2.2.43 (1) OR (B)
OR (inclusive OR logical)
Logical OR
Operation
Rd
∨
(EAs)
→
Rd
Assembly-Language Format
OR.B
<EAs>, Rd
Operand Size
Byte
Condition Code
H: Previous value remains unchanged.
N: Set to 1 if the result is negative; otherwise
cleared to 0.
Z:
Set to 1 if the result is zero; otherwise
cleared to 0.
V: Always cleared to 0.
C: Previous value remains unchanged.
I
UI
H
U
N
Z
V
C
—
—
—
—
↕
↕
0
—
Description
This instruction ORs the source operand with the contents of an 8-bit register Rd (destination
register) and stores the result in the 8-bit register Rd.
Available Registers
Rd:
R0L to R7L, R0H to R7H
Rs:
R0L to R7L, R0H to R7H
Operand Format and Number of States Required for Execution
Notes
Instruction Format
1st byte
2nd byte
3rd byte
4th byte
Immediate
OR.B
#xx:8, Rd
C
rd
IMM
2
Register direct
OR.B
Rs, Rd
1
4
rs
rd
2
No. of
States
Addressing
Mode
Mnemonic
Operands
139