+1 with Marc. Sounds like a 21MX of some flavor. It will have two prominent card-edge connectors side-by-side around mid-board that connect to memory and I/O busses that run "up" from the PCB-face.
On Sun, Nov 8, 2015 at 3:21 PM, Marc Verdiell <marc.verdi...@gmail.com> wrote: > > Cindy Croxton wrote > >This week I passed up a > > large (at least 24" per side) HP server mainboard from the 70s > > Large HP boards from the 70's. This sounds just about perfect. This one > would have fit the description of a HP 1000 mainboard pretty well. Medium > sized ones too. Anything HP from the 70's or early 80's for that matter. > Bring' em home! > Marc > > > >
