On 11/6/19 11:41 PM, Joel Sherrill wrote: > On Wed, Nov 6, 2019 at 3:23 PM Chris Johns <chr...@rtems.org > <mailto:chr...@rtems.org>> wrote: > > On 7/11/19 1:23 am, Per Dalgas Jakobsen wrote: > > Last week we succeeded starting up an R1000-400 and have a > working environment > > on a FACIT A-4600 monitor. > > Oh my that is amazing. I have not seen one of those since the > early '90s. I > worked on the hardware side of a project written in Ada developed > on one of > those boxes. The FACIT terminals are nice, I ended up with one for > many years > after the Ada box was switched off. > > > Impressive to get that running. I did some Internet sleuthing and > that's not easy. :)
Thanks, we wouldn't have succeeded without help from several people. The FACIT terminal is certainly nice. 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 ;) > > The R1000-400 is a machine intended for team development and > maintenance of > > large Ada systems: > > https://en.wikipedia.org/wiki/Rational_R1000 > > https://datamuseum.dk/wiki/Rational/R1000s400 > > > > A log of our efforts to get it running, with some picture can be > found here: > > https://datamuseum.dk/wiki/Rational/R1000s400/Logbook > > > > If there is anyone here that may have some history, stories or > knowledge related > > to the R1000-400, we would be very interested to hear about it. > Especially if it > > involves RTEMS of course :) > > I did not use the Rational box but I remember somethings. The > run-time parts I > saw had a tick and basic tasking and I think an interrupt pragma > but I seem to > remember the software had a lot of sleeps and polls. > > > That's about all that's required for an Ada run-time. One of the > original goals of > the Army sponsorship of the RTEMS Project was to be a cross-compiler > Ada run-time. > We did implement it for Tartan and Telesoft but not Rational (or any > other vendor). > It pointed out that the Ada products suffered from some of the same > things RTOS > products do that RTEMS was supposed to address. The run-time > interfaces were > highly proprietary, subject to change, required an expensive (USD100K > in 1991) > source access license fee which needed to be paid for each version, > and were > not really designed to be delivered as source code. 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... Thanks for sharing your stories :-) Best regards Per
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