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

See also: AND
See also: OR
See also: XOR

NOT Bitwise NOT