Hi Tony, Thanks very much for the reply, that's increased my knowledge of these machines by at least 100%!!!! I'd forgotten that they existed at all until I spotted a message from you mentioning them. ISTR seeing one sometime around 1978 when I visited a computer installation as part of my computers course at school, but that's pretty much all the contact I've ever had with them. My main questions at the moment are, where should I start looking to acquire one and (if I had a choice) which machine would you recommend to try and get hold of? TTFN - Pete. -- Hardware & Software Engineer. Sound Engineer. Collector of Arcade Machines, Games Consoles & Obsolete Computers (esp DEC) peter.pachla(a)virgin.net | peter.pachla(a)vectrex.freeserve.co.uk | peter.pachla(a)wintermute.free-online.co.uk | www.wintermute.free-online.co.uk --