I too have an original Bigboard, and complete documentation set (also paper), however I don't think this will be all that useful to the OP, as the BB2 is quite a bit different. To identify which BB you have: BB1: - Large 4x8 array of 4116 RAMs - EPROMS are in a row going across (side to side) the board - Video is hardwired (no 6845 CRT controller) - Reads "The Furguson" in large letters, somewhat centered on the board, about 1/4 from one end. - No prototypeing area BB2: - Single 1x8 row of 4164 RAMs - EPROMS are in a row going down the side (at the edge) - Contains 6845 CTR controller - Reads "BIGBOARD II" along one edge. - Has a prototyping area at one end. There's lots of other differences, but these are the most visible ones. I have a photo of my BB1 on my site (look under "non S100 - CP/M"). Unfortunately I don't have information on the BB2 except for advertisements and articals published in Micro Cornucopia. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html