Rabbit 2000 - Page 76

72 Rabbit 2000/3000 Microprocessor
Description
• OR n: Performs a logical OR operation between the byte in the Accumulator and the 8-bit con-
stant n.
• OR r: Performs a logical OR operation between the byte in the Accumulator an the byte in
register r (any of the registers A, B, C, D, E, H, or L).
The relative bits of each byte are compared (i.e., the bit 1 of both bytes are compared, the bit 2 of both bytes
are compared, etc.) and the associated bit in the result byte is set if either of the compared bits is set. The
result is stored in the Accumulator.
OR n
OR r
Opcode Instruction Clocks Operation
F6 n OR n 4 (2,2) A=A|n
——
B7
B0
B1
B2
B3
B4
B5
OR r
OR A
OR B
OR C
OR D
OR E
OR H
OR L
2
2
2
2
2
2
2
2
A=A|r
A=A|A
A=A|B
A=A|C
A=A|D
A=A|E
A=A|H
A=A|L
Flags ALTD I/O
S Z L/V C F R SP S D
• • L 0 • •