[TUHS] AT+T UNIX PC Information needed

Brantley Coile brantley at coraid.com
Sun Feb 19 00:34:23 AEST 2006

The tree you're barking up has fruit.  I know the schematics are
out there.  I used to have a set, but have since lost them.

I've used several 7300s.  The hardware was designed by convergent
technologies.  It has a wonky graphics interface because of a poor
choice of a monitor.

There should be simple power converters to give you 120v at 60 Hz.

The 7300 was used as a console for some of the AT&T PBXs, so there was
a lot of them made.  They had the bigest expansion slots I have ever
seen, going almost the entire depth of the box, which was too deep.
Key action on the keyboard was nice.  The unicomp keyboad that I now
use has similar action.

If AT&T had put some version of Unix other than System V, there might
have been life in the old girl.  The UNIX PC and the DMD terminals had
this myopic corporate protectionism in common.  I always thought that
if the DMD5620 had been cheaper and they had had OS support for BSD as
well as System V, the history of computing would have been very
different.  I couldn't get my boss to pay $6K for a terminal when the
average price for a nice terminal was $1K.  If he had let me buy one,
I then would have had to port the support code.  Compilers, the Mux
communiction protocol, all the programs that ran in the terminal,
would have had to be change to run under the non-System V system that
we were using at the time.  AT&T's decisions during the period
displayed a persistant lack of undertanding marketing.  If the
customer came first, they would have supported the OS customers
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