Rabbit 2000 - 9.1 Parallel Port A

102 Rabbit 2000/3000 Microprocessor
Description
• OR n: Performs a logical OR operation between the byte in A and the 8-bit constant n.
• OR r: Performs a logical OR operation between the byte in A and the byte in r (any of the reg-
isters A, B, C, D, E, H, or L).
The relative bits of each byte are compared (i.e., bit 1 of both bytes are compared, bit 2 of both bytes are com-
pared, etc.) and the associated bit in the result byte is set if either of the compared bits is set. The result is
stored in A.
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 • •