Testing the machine is easy. Attach a program that interfaces with the circuits. make it go back like a couple of minutes. If it worked you'd know
Also you can code it to come right back ifyou want.
From UFO City (This guy queried an old IBM programmer for the 5100):
Here is his response:
The 5100 did not have a true operating system. Any similarity to one was provided by the “keyboard” code. It also provided for some basic debug things
and of course it had its share of “hooks” to do other things. There were two emulators provided, a System 34 emulator for the Basic language, and a
System 360 emulator for executing the APL interactive language.
One hook that was never documented for external IBM users was one for launching programs, written in the System 360 machine language, from APL. I
personally used this hook for manipulating large arrays because it was faster and reduced memory requirements. APL has a habit of creating multiple
copies of a variable while manipulating it.
I believe you may be thinking about the 360 emulator.
eXport Ventures Corporation
Rochester, MN 55901
What that means, I'm not sure. Maybe someone good with computers can explain it all to me. Thanks.
Posted on: 2003/8/16 6:59
Re: It's time
OK, what it doesn't answer is whether the 5100 was/is the only device capable of emulating and manipulating APL. He seems to think it was more
capable than anything else of higher processing speeds when manipulating this kind of language and that tells me that it is not the only device with
the ability to do it.
What we need to know is if there is a system/machine that can do the same job, but better than the 5100 today. If there is, then our friend John has
his information wrong, and for someone who comes from the future, you would think he would know that.
Posted on: 2003/8/16 7:48
Re: It's time
The key statement is... "One hook that was never documented for external IBM users was one for launching programs, written in the System 360 machine
language, from APL."
That's almost exactly what John said. What exactly is it that was never documented?
After reading John's posts, it doesn't appear that APL was the key. It was the ability of the 5100 to translate all the various machine languages
that came before it. Is this what a post-nuclear, post-Y2K society would need to bring all those old computers back on-line?
It would be interesting to find out if the Yanks are using old computers to bring the power back up in New England.