Sign magnitude, one's complement, two's complement
spc at conman.org
Sat Aug 22 16:23:39 CDT 2015
For my own morbid curiosity, and because it came up on another mailing
list I'm on , what machines commercially avaialble were sign magnitude
and one's complement? Every machine I've encountered was two's complement
(okay, IEEE 754  is a sign magnitude format but I'm talking about integer
implementations here, not floating point). I've only found reference to one
sign magnitude computer (the IBM 7090, release in 1959) and a few one's
complement machines (mostly the PDP series from DEC).
Where there others? And honestly, are there any machines that use
anything other than two's complement today?
 AKA floating point.
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