The OR of the first and second operands is placed in the first-operand location.
Operands are treated as unstructured logical quantities, and the connective OR is applied bit by bit. A bit position in the result is set to one if the corresponding bit position in one or both operands contains a one; otherwise, the result bit is set to zero.
Resulting Condition Code:
0 ~ Result is zero
1 ~ Result not zero
2 ~ -
3 ~ -
Program Exceptions:
Access (fetch, operand 2, 0; fetch and store, operand 1, 0I)
Programming Note
The instruction OR may be used to set a bit to one.
The immediate byte's position in the operand
is reversed. Given a word-aligned address D,
bytes will be accessed as follows:
\begin{tabular}{ll}
Address Bits
D D(31:24)
D+1 D(23:16)
D+2 D(15:8)
D+3 D(7:0)