Unibus (was Re: VMS Documentation CD-ROM &unibus question)

From: Bob Shannon <bshannon_at_tiac.net>
Date: Thu Jun 14 19:43:23 2001

I've got some documentation on these, I repaired one for a friend many
years back.

Clearly one of the most collectable vintage machines!

Tony Duell wrote:

> >
> > HP 9100?
>
> Exactly..
>
> The 8 pin chips are the sense amplifiers and comparators on the
> (magnetic) card reader PCB. All the logic is discrete components (and
> that wonderful ROM-in-a-PCB).
>
> > > > > Incidentally, has anyone ever seen a 0.125" pitch 44 pin (22 pin DS) edge
> > > > > connector. No, I don't mean 0.156" (I was asking about those a few weeks
> > > > > back, I know). The 0.125" version is used as the expansion connector on
> > > > > one classic (very classic) desktop machine.
>
> [...]
>
> > > > > Minor puzzle : Which machine?
> > > >
> > > > No idea.
> > >
> > > OK, a few hints... Many people wouldn't call it a computer (although it
> > > is). There are a total of 8 ICs in it, and all are simple 8 pin devices.
> > > A fair number of transistors and diodes, but not as many as you'd expect.
Received on Thu Jun 14 2001 - 19:43:23 BST