Well, others have guessed at the 8080 Clone, but I'll step in and point out that if minimal part count is an important feature, then you can get by with a *lot* less. Especially if you go to a bit-serial architecture. (Something that's still mentioned in many computer architecture textbooks, even if it isn't used much anymore!) How big? I'll venture a guess that a 12-bit serial CPU could be done on one largish (i.e. a square foot) PC board, using TO-92's, resistors, capacitors, and diodes. This isn't too far out of line with many bit-serial designs from the late 1960's (for example, many bit-serial desktop calculators used a PC board - or two or three - about this size.) Total cost? Maybe $1500 in large scale production, including testing costs. Of course, you now hook up memory to this CPU. Doing that with discretes would be a chore! -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927