> > RESULT = (255 / A) * B


Do you really need 255*B  ?

Say you have variables

A
B_Hi
B_Lo

If you can get away with 256*B then you just need to store B into B_Hi and
make B_Lo = 0.

Now just perform the 16bit (B_Hi:B_Lo) division by 8bit A.

I think it would be quicker to multiply by 256 (a non event as it's the high
byte of a 16bit word) and then subtract B if you actually do want 255 rather
than do a long multiplication by 255.

What are you trying to calculate?

Pete

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