At any rate, something finally shows up on ebay that
isn't such a
card. It was a pair of input devices: keyboard and dials box. They
look like they were for a PS300 or PS390. However, they were just the
input devices without the associated terminal. These devices aren't
really usable with anything else, at least not without some reverse
engineering (the keyboard is custom with LED labels above the function
They really are beautiful. A pair of HP1414 displays to label each
function key (or knob on the twiddlebox).
From what I remember there are no custom chips inside
the keyboard or
twiddlebox, althoguh there is some kind of microcontroller or
microprocessor + EPROM/ The link back to the host looked to be an
ansynchronous serial link. It should be _possible_ to work it out (how
I'd love a hardware tech manual for the PS390...)
I know one of you out there has a PS390 :-) and I
recently learned
I assuem that's mine...
Anyways, like the other ebay thread the other day,
some people have
funny ideas about what things are worth, both buyers and sellers. I'm
Well, in the latter category, somebody on e-bay UK this morning was
offering a DEC DRV11-J card (I assume some kind of parallel interface)
with an opening bid of \pounds 525.00. Maybe that's a good buy if you
have one in a process control system and need a spare (although to be
honest it would be cheaper to employ me to fix your existing one), but
anyway...
In the former category, there can be many reasons why somebody _really_
wants something. If (as has happeneed to me) you've spent 20 years
looking for some obscure device and one appears on E-bay, you probably
would put in a fairly high bid for it.
willing to bet that some people who stumble upon old
computers at
estate sales are surprised how much they fetch on ebay.
I'm constantly suprised by how much some machines fetch, machines that I
personally don't think much of....
-tony