I need to calculate (A*X)/(A+B+C+D)  where A,B,C,D,X are 8 bit numbers
using the full 0..255 range!

A*X would certainly be 16 bit
A+B+C+D would have a max of 1020 -> 10bit!

I would then need a 8x8bit multiply and a 16/10bit divide routine

(I searched and read all the FAQ's/docs/... and couldn't find anything)

thanks,
  Osama

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Osama ALASSIRY  osama@qatar.net.qa osama@alassiry.com
                              http://www.alassiry.com