When I was at the coal company, so many ages ago, we had all these: the Yale
ASCII code running on a Series 1(?), then the 7171 controller replacing
that, and we have a 7170, which we developed code for to allow us to attach
digitizing boards directly to VM, replacing the need for our DECsystem-1090
at the time. Ultimately, this setup was replaced with PCs, then a
new-fangled techie thing that everyone thought would be a passing fad.
Boy, that brought back lots of memories, including two weeks in Endicott
working with one of the first 7170's and a digitizer we had shipped out
there and back, getting the first shot at making them work together.
--
.~. Robert P. Nix Mayo Foundation
/V\ RO-OE-5-55 200 First Street SW
/( )\ 507-284-0844 Rochester, MN 55905
^^-^^ -----
"In theory, theory and practice are the same, but
in practice, theory and practice are different."
On 5/30/07 9:00 AM, "David Boyes" <[EMAIL PROTECTED]> wrote:
>> John was this a 717 type device as described in, "Granted, we had a
>> 3270ish
>> box
>> on the 3274's coax network that would allow a "regular" ASCII terminal
> to
>> be
>> used instead of, say, a 3277."? And can you point to an appropriate
>> location
>> to see what a 7171 type device would look like.
>
> A 7171 (aka the Yale ASCII Controller) was a standard IBM half-height
> cabinet (same physical width and depth as other 370 processor and disk
> hardware, so it would line up nicely in rows, just half height,). It
> contained a 7RU chassis with a parallel channel interface card, the
> control unit processor cards (2), and up to 8 serial interface cards
> with 8 ports on each card, for a total of 64 connected ASCII devices per
> 7171 unit. AFAIK, they only came in Standard Ivory -- rumor had it you
> could get different color door panels, but the sides only came in Ivory.
> The color conversion kit contained two cans of spray enamel, some
> masking tape and a drop cloth...8-)
>
> AFAIK, it was the only terminal controller ever sold by IBM that
> supported more than 32 physical devices. It appeared to the host as two
> local non-SNA 3274s, each with 32 devices.
>
> If you *really* want obscure, find a 7170. Channel-attached UNIBUS cage,
> allowed use of the VAX Ethernet adapters for WISCnet and the very early
> VM TCP code. Weird, weird, *weird* device.
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