Texas Instruments TI-86 - Manual (Page 337)

Chapter 20: A to Z Function and Instruction Reference
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20ATOZ.DOC TI-86, Chap 20, US English Bob Fedorisko Revised: 02/13/01 2:42 PM Printed: 02/13/01 3:05 PM Page 325 of 118 20ATOZ.DOC TI-86, Chap 20, US English Bob Fedorisko Revised: 02/13/01 2:42 PM Printed: 02/13/01 3:05 PM Page 325 of 118
not
BASE BOOL menu
not integer
Returns the one’s complement of a real integer.
Internally, integer is represented as a 16-bit binary
number. The value of each bit is flipped (0 becomes 1,
and vice versa) for the one’s complement.
For example, not 78:
78 = 0000000001001110Ь
1111111110110001Ь (one’s complement)
To find the magnitude of a negative binary number,
determine its two’s complement (take the one’s
complement and then add 1). For example:
1111111110110001Ü = one’s complement of 78
0000000001001110Ü (one’s complement)
+ 0000000000000001Ь
0000000001001111Ь = 79 (two’s complement)
Therefore, not 78 = L79.
You can enter real numbers instead of integers, but they
are truncated automatically before the comparison.
In Dec number base mode:
not 78 b L 79
In Bin number base mode:
not 1001110 b
1111111110110001Ü
Ans 4Dec b L 79Þ
Sign bit; 1 indicates a negative number