NOT              Bitwise NOT                                    MASM Operator
 
  NOT expression
 
    Performs a bitwise NOT (inverse) on expression, causing 1s to change
    to 0s and 0s to change to 1s.  The following table shows the result of
    applying NOT to one bit:
 
                           Bit     Result
                            0        1
                            1        0

Seealso:


 AND 
 OR 
 XOR