约定字长8位
X = -10001B
[X]原 = 11000100B = C4H
[X]反 = 10111011B = BBH
[X]补 = 10111100B = BCH
X = +84D = +1010100B
[X]原 = 01010100B = 54H
[X]反 = 01010100B = 54H
[X]补 = 01010100B = 54H
X = -84D = -1010100B
[X]原 = 11010100B = D4H
[X]反 = 10101011B = ABH
[X]补 = 10101100B = ACH
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