Chris M wrote:
http://cgi.ebay.com/Old-Vintage-1981-IBM-<160148944781>
is the only thing that distinguishes this unit from a
vanilla 5150 a card that allows it to network with a mainframe?
There was a different set of hardware for this system. It also ran
software which I think IBM
called Info Window, and had a special graphics card in it.
This guy looks liike he was using it like an XT but there was a lot of
info window stuff if
you actually used it in an ibm environment.
I think that the same software protocol was used by IBM for POS systems,
and other
custom terminal applications.
Recall that the IBM PC was a project of the terminals division of IBM.
As such this
is about the only example of a terminal division product which actually
used it as
a terminal, rather than adding the 3270 card in and running a program to
get to the
mainframe. I don't actually count that as a terminal division product
as much as a product
of the PC people.
The other usage that was unique was the VM XT and VM/AT systems, which were
from the systems people. Same people who also did the
PC-390 and PC-370
later,
much to the chagrin of the systems people.
It all gets into the long sordid tale about how IBM "blew" the PC which
doesnt need to be
rehashed here.
Jim