ones' complement
English edit
Noun edit
ones' complement (plural ones' complements)
 (computing) The number obtained by subtracting a given ndigit binary number from (which yields the same result as the logical complement).
 The ones' complement of 0xAAAA is 0x5555 on a 16bit machine, and 0xFFFF5555 on a 32bit machine.
 (computing) The convention by which bit patterns with high bit 0 represent positive numbers from 0 to directly, while bit patterns with high bit 1 represent negative numbers from 0 to , n being the word size of the machine, and the numeric complement of a number is its ones' complement.
 Computers that use ones' complement arithmetic have two representations for zero, all 0's and all 1's.
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number

convention

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