help identifying S100 board

From: James M. Walker <chejmw_at_acsu.buffalo.edu>
Date: Wed Nov 12 07:22:22 2003

The board looks similar to the standard "Dual Serial Port". which means it
most
likely is a standard serial interface card. That also leads to the
following, if you
take a standard DB-25 connector with lines to all the pins, and put a 26 pin
header
on the wire, you should find, that the signals for "standard RS-232-C" are
available
at the DB-25 connector pins. Since it is a former Cromemco product (maybe) I
would imagine that the memory is for high speed buffering onboard, the Z-80
and SIO
indicate that it might even be a form of SDLC/HDLC networking card. JAG

Jim
WB2FCN

----- Original Message -----
From: "Ian Primus" <ian_primus_at_yahoo.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk_at_classiccmp.org>
Sent: Tuesday, November 11, 2003 8:12 PM
Subject: Re: help identifying S100 board


>
> On Monday, November 10, 2003, at 09:06 PM, Patrick Rigney wrote:
>
> >> -----Original Message-----
> >> On Monday, November 10, 2003, at 07:58 PM, Dwight K. Elvey wrote:
> >>
> >>> Hi
> >>> This may not even be a s100 board. The height is wrong. Check
> >>> the power leads carefully before plugging into a s100. It
> >>> does seem to be a complete single board computer.
> >>> Dwight
> >>>
> >>
> >> Yeah, I had thought of that, as the only S100 boards I have seen were
> >> shorter, but then again, I don't have any S100 hardware, so I don't
> >
> > Connector offset looks about right though, doesn't it? Didn't a
> > company
> > called Dynatech buy Cromemco?
> >
> > Patrick
> >
>
> I did some more digging on the internet, and found this:
>
> Cromemco
> Was acquired by Dynatech, Inc, Burlington, MA and was renamed DCS
> (Dynatech Computer Systems) continuing to produce S100 based systems
> into the early 90's before they were shut down.
>
> That would fit with the boards I have, since the copyright date is
> 1990. I need to sit down and trace out more of the circuits on the
> board, but it definitely does seem to be an S100 board. I have tried to
> figure out what the two 26 pin headers at the upper left are connected
> to, but I can't see under some of the components. They do appear to be
> serial ports, but I don't know which pins would contain which signals,
> so wiring it up to a terminal might be tricky. Maybe if I look up the
> specs on the UART and the 1488/1489 driver pair, I can figure out how
> their circuit works, and where I can tap into the signals. Powering the
> board shouldn't be a problem, since I can easily tell how the power
> regulators are connected. Now, if only I knew what this thing did...
>
> Ian Primus
> ian_primus_at_yahoo.com
>
>
Received on Wed Nov 12 2003 - 07:22:22 GMT