On 10/09/2013 12:46, Mark Benson wrote: Would I be a mile out if I thought the CPU board was the same board they used in the PWS series Alpha/Pentium systems. They also used 21164s on a slot-in board with a sepsrate backplane board for ISA/PCI? Also anyone got any idea what OSs these run. I know some other DEC flavour industrial machines are restricted and won't run VMS? Sampsa Laine <sampsa at mac.com> wrote: http://www.ebay.co.uk/itm/Dec-Digital-Alpha-21164-500-Mhz-PICMG-DMCC-Indust… No bids and it's pretty low priced for now.. sampsa <sampsa at mac.com> mobile +358 40 7208932 -- Mark Benson It will run all DIGITAL operating systems. It is a Takara apparently. The ebay seller is really good - it came with a CD will all the original PDFs on. Regards, Mark.