Hi all,

I found the problem lay in my use of the Carry flag. I had based my
procedure upon the Microchip maths app note. However I had extended it to 24
bits. The problem lay in my use of the Carry flag. I expected (read assumed)
that when a register was incremented beyond FF to 00 that not only the Z
flag but also the C flag would be brought high. It appears not!! My extended
precision division was therefore based around a dodgy subtraction procedure-
bound to failure :)
I'm pretty sure that the code has other examples of this gotcha in... but
it's 03:15 local time and time for some zzzzZZZZZs.

Ben
I guess that 99.9% was a little too confident....

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