Radio Shack TRS-80 PC-3

Thus, 1 is inverted to 0, and 0 to 1 for each bit, which is "to take negative (NOT)."
Then
the following will result when 1 and NOT 1 are added together:
0000000000000001 (1 )
+) 1111111111111110 (NOT 1)
1111111111111111 (-1)
Thus, all bits become 1. According to the above number list, the bits become -1 in deciml notation; that is, 1 + NOT 1 == -1.
The relationsh ip between numerical value X and its negative
(NOT
X) is:
X + NOT X =-1
This results in an equation of NOT X = -X-1
i.e.NOT X==-(X+1)
From this equation, the following results are found
NOT 0=-1
NOT-1=0
NOT -2 = 1
More than
two relational expressions can be combined with these operators. You should take care to use parentheses to make the
intended comparison clear.
(A<9) AND (8)5)
(A> = 1'1) AND NOT (A> 201
(C = 5) OR (C = 6) OR (C = 7)
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