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> From: Jason Bent <mbcjabt@MAIL1.MCC.AC.UK>
> There are at least THREE ways. Other people have covered XOR and
> COMF, which you use 99% of the time. Another litle trick is
>
>   255 - A = NOT A
>


This is the 8 bit version of the more general case of
NOT A  = -A -1 on any two's compliment processor.
This will work on any word size. It is a compiler
optimization that is very useful in some cases.

Walter Banks