Cameron, 18 Jul you wrote to me:
EW> Yes, but AFAIK not all numbers with the high bit set are negative 
umbers.
EW> 1's would be '-0', just as all 0's would be '+0'.
 CC>     All ones is -1  (0xff...)
 CC>     All zeros is 0  (0x00...)
Also on a one's complement machine? ;-)
 CC>     In discrete math, is zero positive/negative or neither?
Nothing _is_ in math, normally neither (so positive means > 0), but prehaps 
there are uses to define it as both (>=0).
Bye,
 Erik 
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