Sign magnitude, one's complement, two's complement

[Toby Thain]

On 2015-08-22 5:49 PM, Al Kossow wrote:
> On 8/22/15 2:23 PM, Sean Conner wrote:
>>
>>    For my own morbid curiosity, and because it came up on another mailing
>> list I'm on [1], what machines commercially avaialble were sign magnitude
>> and one's complement?
>
> A table of what computers had what numeric representation is one of
> those things
> that should have been done, but never has. Now that bitsavers has a
> reasonable collection
> of technical/programming manuals, it might even be possible.
>
> http://quadibloc.com/comp/cpint.htm
>
> has some information, but it isn't really in any sort of tabular form.
>

Blaauw and Brooks also has a lot of the required data, not sure if it 
has a table.

There's a copy on ebay right now http://ur1.ca/nipwp

--Toby

> AFAIK, the PDP-1 was the only DEC 1's compliment machine that shipped.
>
> I had also heard that 1's compliment never caught on in short word length
> machines because of the difficulty dealing with multi-word arithmetic.
>
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