> On Jun 23, 2016, at 12:07 PM, Al Kossow <a...@bitsavers.org> wrote: > ... > I have also heard that 2s compliment was popular in shorter word length > machines because 1s compliment multiple precision arithmetic is a PITA > to implement.
That's true. It certainly can be done and has been. But since one's complement
arithmetic uses end around carry, when you have multiple word you have to
defeat the word carry and instead do the carry around the whole number.
paul
