the 50xxxxx number with the letter behind it could be a dec board number. The 50 class could be the artwork, and the letter the board rev. If that is the case, there is probably a 54- class on the other side of the board one number higher. The 54 number is the board with components, and can be tracked down, but not easily.
They could have been renamed by another company. Any other print in the etch? Any pictures? On Sat, May 28, 2016 at 5:51 AM, P Gebhardt <p.gebha...@ymail.com> wrote: > Hello list, > > I recently got a bunch of boards from somebody who was either not able to > tell me where they were from. > The boards seem to be unibus-based with numbers starting with X. I neither > came across these before, nor could find any information in the web about > it: > > Type, P/N , Description > X029, 5013132B, AUC interconnect > X022, 5012197C, unibuswindow > X021, 5012181C, CD ROM control (did that ever exist for unibus?) > > X020, 5012180B, data path > > > > Two 16K mos memory modules M7847 came with the set. > > > No backplane, unfortunately. > Any hints about the type of system and application these boards were for? > Many thanks for any pointers. > > Wish a nice weekend to all of you, > Pierre > > > > ------------------------------------------------------------------------------- > > Pierre's collection of classic computers moved to: > http://www.digitalheritage.de >
