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.