Binary Arithmetic Using Complement Codes

v Example

1) X = 12 à 0 1 1 0 0

Y = -8 à 1 1 0 0 0

-------------

(1) 0 0 1 0 0

ß

overflow is ignored

-8 -- 1^st complement: 0 1 1 1

-- 2^nd complement: 1 0 0 0