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On 11/6/19 11:41 PM, Joel Sherrill wrote:<br>
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cite="mid:CAF9ehCUaYkpxH8rF9Z90RmAkErAnRH1m8x88u1uF0+ywFv65yg@mail.gmail.com">
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<div dir="ltr">On Wed, Nov 6, 2019 at 3:23 PM Chris Johns <<a
href="mailto:chrisj@rtems.org" moz-do-not-send="true">chrisj@rtems.org</a>>
wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">On 7/11/19 1:23 am, Per
Dalgas Jakobsen wrote:<br>
> Last week we succeeded starting up an R1000-400 and
have a working environment<br>
> on a FACIT A-4600 monitor.<br>
<br>
Oh my that is amazing. I have not seen one of those since
the early '90s. I<br>
worked on the hardware side of a project written in Ada
developed on one of<br>
those boxes. The FACIT terminals are nice, I ended up with
one for many years<br>
after the Ada box was switched off.<br>
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<div>Impressive to get that running. I did some Internet
sleuthing and that's not easy. :)</div>
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<p>Thanks, we wouldn't have succeeded without help from several
people.<br>
</p>
<p>The FACIT terminal is certainly nice.<br>
I'd actually forgot how responsive and usable 9600 baud terminal
can be. A little odd to think about when IT-people of today whine
over less than 1Gbit/s connections - To be fair, ASCII terminals
do not present images or videos very well, but on the other hand,
how many people actually require (or even benefits) from having a
graphical environment ;)<br>
</p>
<br>
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cite="mid:CAF9ehCUaYkpxH8rF9Z90RmAkErAnRH1m8x88u1uF0+ywFv65yg@mail.gmail.com">
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> The R1000-400 is a machine intended for team
development and maintenance of<br>
> large Ada systems:<br>
> <a href="https://en.wikipedia.org/wiki/Rational_R1000"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://en.wikipedia.org/wiki/Rational_R1000</a><br>
> <a
href="https://datamuseum.dk/wiki/Rational/R1000s400"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://datamuseum.dk/wiki/Rational/R1000s400</a><br>
> <br>
> A log of our efforts to get it running, with some
picture can be found here:<br>
> <a
href="https://datamuseum.dk/wiki/Rational/R1000s400/Logbook"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://datamuseum.dk/wiki/Rational/R1000s400/Logbook</a><br>
> <br>
> If there is anyone here that may have some history,
stories or knowledge related<br>
> to the R1000-400, we would be very interested to hear
about it. Especially if it<br>
> involves RTEMS of course :)<br>
<br>
I did not use the Rational box but I remember somethings.
The run-time parts I<br>
saw had a tick and basic tasking and I think an interrupt
pragma but I seem to<br>
remember the software had a lot of sleeps and polls.<br>
</blockquote>
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</div>
<div>That's about all that's required for an Ada run-time. One
of the original goals of</div>
<div>the Army sponsorship of the RTEMS Project was to be a
cross-compiler Ada run-time.</div>
<div>We did implement it for Tartan and Telesoft but not
Rational (or any other vendor). </div>
<div>It pointed out that the Ada products suffered from some
of the same things RTOS</div>
<div>products do that RTEMS was supposed to address. The
run-time interfaces were</div>
<div>highly proprietary, subject to change, required an
expensive (USD100K in 1991) </div>
<div>source access license fee which needed to be paid for
each version, and were </div>
<div>not really designed to be delivered as source code.<br>
</div>
</div>
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<p>Apparently the R1000-400 came with a price tag of almost USD1M at
that time - No wonder that Ada did not get the deserved traction
at that time...</p>
<p>Thanks for sharing your stories :-)</p>
<p>Best regards<br>
Per<br>
</p>
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