OR               Bitwise Logical OR                             MASM Operator

  expression1 OR expression2

    Performs a bitwise logical OR between expression1 and expression2.
    The following table shows the result of applying OR to two one-bit
    numbers:

                         Bit      Bit      Result
                          0        0         0
                          0        1         1
                          1        0         1
                          1        1         1