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

From: Ethan Dicks <ethan_dicks_at_yahoo.com>
Date: Wed Jun 13 19:40:35 2001

--- Tony Duell <ard_at_p850ug1.demon.co.uk> wrote:
> > I suppose I could cut two down to size, but put them on a PCB with the cut
> > edges on opposite sides...
> It's a bit of a kludge!

Of course it is. It's far from my first choice, but I can not find the
right thing anywhere.
> I've done DS boards on the sort of setup you'd have at home (bubble etch
> tank, UV box). Worked fine -- registration was not as big a problem as
> you might think. But through-hole plating is impossible I think.

Right... requires lots of strange processes. For a DS board, people used
to use metal eyelets to line the holes. I even have a few DEC FLIP-CHIPs
made that way.

> > Sullins has a 50/100 0.125" connector...
> My 44 pins was the total -- 22 each side. Which means the 56 pin
> connector (28 each side) could be cut down too.... It's still a kludge
> and I'd rather get the right part if at all possible.

Doh! Right you are. Didn't read carefully.
> 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.

There aren't any TTL gates with 8 pins that I know of, so I immediately
think of linear parts and/or 555 timers. I still have no idea.


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Received on Wed Jun 13 2001 - 19:40:35 BST

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