Sharp PC-1403 Operation Manual page 94

88
This results in an equation of NOT X
=
-X-1, i.e.,
NOT X
= -
(X
+
1)
Thus, 1 is inverted to 0, and O to 1 for each bit, which is called "negation (NOT
operation}." Then, the following will result when 1 and NOT 1 are added together:
0000000000000001 (1)
+}
1111111111111110(NOT1) . . . . . . . . . . . . . . . . . . . ones complement
1111111111111111 (-1) twos complement
Thus, all bits become
1.
According to the above number list, the bi t s become -1 in
decimal notation, that is, 1
+
NOT 1 =
-1.
The relationship between numerical value X and its negated (or inverted) value NOT X
is:
X +NOT X = -1
The negation (NOT) of a binary number 0000000000000001 is taken as follows:
NOT 0000000000000001
(Negative)-> 1111111111111110
Decimal 16-bit binary
notation n otation
32767 0111111111111111
3 0000000000000011
2 0000000000000010
1 0000000000000001
0 0000000000000000
-1
111;111111111111
-2
1111111111111110
-3 1111111111111101
-32768 1000000000000000
•Decimal numbers can be expressed in the bi n ary notation of 16 bits as follows:
The XOR instruction cannot be used in combination with the AND or OR instruction in
an expression. To execute expression D=(A XOR B) AND C, for example, divide the
expression into two parts for execution: D=A XOR Band D=O ANO C.
Concepts and Terms of BASIC