TRS-80 Model 1 (was: Arty computers (was: Re: PDP-11/70 in Yates Center, KS)
Jim Isbell, W5JAI
jim.isbell at gmail.com
Sat Feb 3 22:33:49 CST 2007
About all I can remember on its physical image (and even this may be flawed)
was that the window behind which the "solid state memory" resided was on the
lower right perhaps in the last rack to the right. I vaguely remember that
there were at least 3 and possibly many many more racks. There were also at
least four full sized racks that contained Ampex tape decks that were very
finicky and often had to be restarted after they would loose their tension.
There were miles and miles of wiring under the floor of the room. There was
also a punched card reader added toward the end of my tenure with the
machine that greatly improved the programming ease
However, I would think that it is unlikely I would have forgotten the
phrase, "seven oh seventy" Its a catchy phrase and has stuck with me for
almost fifty years. We didn't call it the "seventy seventy" or any other
sequence of words, just the "Seven Oh Seventy". However, what it looked
like has pretty much been erased and blended with the many other computers
of similar size that I worked on.
I do remember back in the early ninety's seeing a book on Cold War espionage
that had an article on it and referenced several aspects of it that I
remembered at the time.
Yes it was a BIG machine by todays standards and we had 30 tons of air
conditioning to keep the room cool because of all the tubes. If it had been
solid state, all that air conditioning would not have been needed.
On 2/3/07, William Donzelli <wdonzelli at gmail.com> wrote:
> > You see the 7070 that I worked on was purchased by the US government for
> > very Top Secret installation so it may have been in use before the
> > had access to it. Which, by the way, may also be why it was NOT solid
> > state, it was an early model ??
> I can not imagine IBM making a tube version of the 7070, with no
> history on it. That project would have been something as big as the
> AN/FSQ-7. The 7070 was a pretty good sized machine.
> So now you have a bunch of us wondering what machine you used. I still
> doubt it was a 7070 if it had tubes. I bet it was a 700 series machine
> of some sort. It could have been a 707 - IBM often gave oddball type
> numbers out to semicustom or custom (AKA RPQ) machines. Have you
> glanced at the IBM history pages? They have a gallery of most of their
> major machines - perhaps you can spot it.
"If you are not living on the edge, well then,
you are just taking up too much space."
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