Anyone recognize this bus/form factor?

Mike Stein mhs.stein at
Thu Sep 24 09:06:51 CDT 2015

Found a few more boards; I guess the displays, 
optocouplers and surge suppressors suggest an 
industrial system of some sort, perhaps custom or 
limited production.

Wonder why that type of connector wasn't used more 
often for a bus instead of presumably more 
expensive edge connectors; I think I do have some 
(CDC?) boards that are the opposite, i.e. pins 
plugging into sockets on the backplane.

----- Original Message ----- 
From: "Mike Ross" <tmfdmike at>
To: "General Discussion: On-Topic and Off-Topic
Posts" <cctalk at>
Sent: Wednesday, September 23, 2015 11:43 PM
Subject: Re: Anyone recognize this bus/form

> That's odd.
> I can't say for sure but... it has the feel of
> something that might
> have belonged in a terminal or keyboard...
> character generator or
> something... stab in the dark really.
> Mike
> On Thu, Sep 24, 2015 at 2:05 PM, Mike Stein
> <mhs.stein at> wrote:
>> 68xx system, unusual (in my experience) 40-pin
>> single row header bus.
>> Anyone recognize it?
> -- 
> 'No greater love hath a man than he lay down his
> life for his brother.
> Not for millions, not for glory, not for fame.
> For one person, in the dark, where no one will
> ever know or see.'

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