<I called Intel Customer Service directly - they have no information on thi <chip in their database. Not surprizing, they have lousy memories. My '82 and '83 data books list them. They are preliminary in the '82book. At that time I'd seem them in the flesh and they were about $150 each. The actual chips were a mask trade with AMD for some of intels parts. I don't think intel ever acually made them as the ones I'd seen though intel branded were AMD foundry marks on the die! That was common practice then and likely now. <Obtaining one of these chips is a nice-to-have, not critical, so I'll proba <let this die for now. But thank you, gentlemen, for your assistance! last I'd seen either they were far from cheap! I's suspect if your can find them they will either go cheap of if they sellers know their limited availability real expensive. Also since the sourcing of them was at best questionable many designers stayed away from them. FYI: I looked at them and while they appeared faster than general math routines on a z80 bytime you did the IO to them and all they could be much slower than a good asm coded routine. Allison