All the information I have says the the auxiliary carry (AC) flag is not affected by DIV or MUL. This is confirmed by "the Bible." However, it would seem to me that whenever I execute the MUL or DIV instruction on an AT89S8252 that the AC is always being set.

Does anyone else have any information on what AC does with MUL and DIV? It's possible that I'm just being stupid and as soon as I post this message I'll find something silly in my code that is causing me to jump to the wrong conclusion, but at this point this is what I'm observing.

Regards,
Craig Steiner