Re: [midatlanticretro] Re: TI 9900 based mystery system - can you identify?
Thanks for the links and info.
At 03:16 PM 6/22/2006 +0000, you wrote:
--- B Degnan <billdeg@...> wrote:
> Herb's std bus page reminded me that I have a TI chassis I have been
> unable to locate documentation or for that matter identify what I
> have exactly. Now that there are more people in this group, maybe
> someone can help shed some light on the following. .?
Check this Web page of a TI 9900 developer:
You might ask this person which model of 990 you have.
Online docs for the 990 series seem to be at bitsavers:
My recollection about some of these small TI systems, is that the CPU
fit inside a large TI printing terminal. Of course the larger TI 9900
systems were rack-mounted, but that was older technology than what you
have. There does not seem to be much on the Web about the TI 990's -
but in their time they were workhorse minicomputers.
In a way, your TI system represents what would have happened if Intel
and others had not produced their early microprocessors. Namely,
minicomputer manufacturers like TI would have eventually scaled down
their discrete-chip based minicomputers (the 9900's) into single-chip
implementations on smaller boards; and ending up with single-board
applications to support business solutions (point of sale, accounting,
etc.) or manufacturing (process control, etc.) Software and support
would have kept (and did, for the TI 990 series) those "mini-mini"
systems too expensive for individuals or basement developers - the
people who drove the microprocessor revolution.
Just a speculation of course, but as history actually unfolded the
minicomputer companies (TI, DEC, IBM) just could not see how to offer
"micro" versions of their systems which could compete with the
microprocessor-based systems that eventually overtook them. Even the
IBM PC's "success" was not based on IBM legacy software but the fact
it could run recompiled versions of then-current Intel 8080 and 8086
based programs. To the point about the TI systems, I don't think much
TI 990 software made it over to the 99/4 "microcomputers".
(Note: please don't fuss with me over IBM and their PC and
controversies around it. I'm making a point, don't bite my finger for
pointing at it.)
Herbert R. Johnson, New Jersey USA