I have been using the demo UMPS IDE/simulator that Myke Predko recommends in his book: http://www.wirz.com/umps/index.html And I must say that I am extremely impressed and am ready to buy. I see that it is $650 at Wirz, but was wondering if someone else had seen a better price, or knew of a better offer. For example, I see that DonTronics has the Hi-Tech C compiler for $100 less than anywhere else ($750 rather than the regular $850). http://www.dontronics.com/hi-tech.html John Clark, Software Engineer mailto:JohnC@inter-intelli.com (317) 715-8175 Interactive Intelligence, Inc. 3500 DePauw Blvd., Suite 1060 Indianapolis, IN 46268-1136 http://www.inter-intelli.com