Convergent AWS machines (formerly Sold on eBay: Convergent Technologies S/50 a.k.a. Unix PC, AT&T 3B1 Unix Workstation)

AJ Palmgren microtechdart at
Thu Jan 18 04:23:59 CST 2018

Alan, my apologies for the confusion here.  The email subject still said
S/50, but I believe we had switched topics mid-thread.

On Mon, Jan 15, 2018 at 6:16 AM, dwight <dkelvey at> wrote:

> Years ago, we used one of the Convergent machines. I recall playing rats
> on it. It had a green screen. It was a 8086 processor and had some
> Multibus slots in it.

I was replying to Dwight with a link to my AWS machine when Dominique
chipped in with the Burrows comment.

I believe that Dominique was referring to my AWS that I show at

And I agree with you wholeheartedly on your points.  They look nothing
alike, and are based on totally different processors.

|Alan Perry via cctech <cctech at>
|As I mentioned elsewhere, I worked on software for them at Burroughs
('86-'89). I
|picked up a bunch of B25 stuff in '03, but I could never find any software
|them. In retrospect, I wish that I has stashed away B25 (and B1000 (I was
|of the last people in the office supporting software onthe B1000)) stuff,
|than return everything, when I left the company.

That's very cool that you worked on the software.  And, yes, Alan, agreed
about wishing to keep a few of them around...But, I may be able to get the
one that I have running soon.  I'll be working on it on and off this year.

I plan on trying trying to restore the Convergent CTOS on this, rather than
the Burroughs BTOS, at least at first anyway...

I'll keep you posted here on my progress on that.

Thanks, all!


On Wed, Jan 17, 2018 at 11:02 AM, Alan Perry via cctech <
cctech at> wrote:

> Are you sure?
> The B20, B21, B22 looked like this -
> /collections/catalog/102662660 - and nothing like the 3B1 or the S/50.
> The B25 and subsequent models (which are often referred to as B20s) are
> modular systems that are box-shaped and got wider as "slices" were added.
> The B20s were x86-based and the 3B1 (and presumably the CT S/50) was
> 68k-based.
> alan
> On 1/17/18 2:41 AM, Dominique Carlier via cctech wrote:
>> It's interesting, I had exactly the same machine a long time ago, but
>> with a different label. It was a Burroughs B20 distributed by Unisys
>> Dominique
>> On 17/01/2018 06:45, AJ Palmgren via cctalk wrote:
>>> Did it happen to be one of these older-style Convergent AWS machines?
>>> ies-workstation.html


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