3270 controller simulation

Nigel Johnson nw.johnson at ieee.org
Mon Nov 18 19:30:25 CST 2019

I was the Canadian GM of Emulex, whose Persyst Division made a bi-sync 
card for the PC.  I was stunned when, in the era of TCP/IP 
interconnectivity, a client kept on talking about a 'sign-on' card :-) I 
just smile dand accepted his order for lots of product!

On 18/11/2019 20:22, Ethan Dicks via cctalk wrote:
> On Mon, Nov 18, 2019 at 7:42 PM Al Kossow via cctalk
> <cctalk at classiccmp.org> wrote:
>> I find it interesting that the field of comms interoperability with IBM mainframes was huge up until TCP/IP
>> took over, and all traces of the software implementations have disappeared or were consolidated into a couple
>> like Micro Focus.
> The golden years of Software Results and COMBOARDs were 1982-1986,
> perhaps a little later, but not much.  By early 1989, we really didn't
> have many board sales, just maintenance contracts for the existing
> customer base and an occasional upgrade sale (Unibus->VAXBI or
> Unibus-Qbus).  By 1994, there weren't that many customers left on
> maintenance.  The last contract expired around February 1995.
> We did have a last breath of demand in the early 90s that garnered a
> tiny handful of sales - when EDI began to take hold, one of the
> standard transport models was 3780 to an IBM service that essentially
> took care of delivery in the fashion of an ISP.  If you wanted to use
> that network, you needed _a_ product that would move files using sync
> modems and the 3780 protocol.  There were a couple of PC products that
> could do it, and we were one of the last companies still in the Bisync
> space for minicomputers.
> After EDI moved to TCP/IP, that was all over.
> But in the early 80s, we made a few million dollars getting PDP-11s
> and VAXen to interoperate with IBM mainframes.  At that time, lots of
> large companies needed it, then fairly quickly nobody needed it.
> -ethan


Nigel Johnson

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