Ones Complement Comments
Still have the problem that there are two ways of representing 0 (-0, and +0) . Mathematically speaking, no such thing as two representations for zeros. However, addition of K + (-K) now gives Zero! -5 + 5 = $ FA + $ 05 = $FF = -0 !!! Unfortunately, K + 0 = K only works if we use +0, does not work if we use -0.
5 + (+0) = $05 + $00 = $05 = 5 (ok)
5 + (-0) = $05 + $FF = $04 = 4 !!! (wrong)