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PostPosted: Thu Jul 03, 2014 5:13 pm 
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See
http://www.cpushack.com/2013/02/21/char ... rocessors/
which describes how Harris licensed Moore's Novix CPU chips and put theirs into some hundreds of satellites and space probes, including Messenger which orbits Mercury and Cassini which orbits Saturn.

As it says, nice that a language invented for telescope control has gone out into the Solar system.

via Scot Stevenson


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PostPosted: Thu Jul 03, 2014 7:34 pm 
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The Forth processors mentioned scream performance, doing more Forth MIPS than MHz, in spite of very simple hardware. It's too bad good ideas don't always become popular. I guess it's too hard for people to believe it's really that good.

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PostPosted: Thu Jul 03, 2014 8:49 pm 
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GARTHWILSON wrote:
The Forth processors mentioned scream performance, doing more Forth MIPS than MHz, in spite of very simple hardware. It's too bad good ideas don't always become popular. I guess it's too hard for people to believe it's really that good.

I would rather believe that it's more a matter of being a large enough departure from existing practice that it doesn't easily get through the "weirdness" filter, similar to APL, Erlang, Haskell, Smalltalk, Lisp... And, in another direction, Quantum Mechanics. Too weird to seriously dig into, unless you're already interested in such things.

It's not so much "too good to believe", but "I'd sprain my brain if I tried to understand that, and nobody really uses it anyway".


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PostPosted: Thu Jul 03, 2014 8:57 pm 
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nyef wrote:
"weirdness" filter

Like it.


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PostPosted: Thu Jul 03, 2014 10:28 pm 
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BigEd wrote:
As it says, nice that a language invented for telescope control has gone out into the Solar system.

Actually, it makes sense. Telescopes and space were made for each other. That being the case, Forth would be in the picture(!).

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PostPosted: Fri Jul 04, 2014 2:26 pm 
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Thanks for that link. I didn't realize how far out the Novix/RTX chips were being used.

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PostPosted: Sat Jul 19, 2014 2:51 am 
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When I see neat things like this I always want to get one for myself to play with. A homebrew SBC with a satellite processor would be one of a kind. Here's one on eBay:

http://www.ebay.com/itm/1PC-NEW-HARRIS- ... 1e8795efff

BGA is no fun though and you might have quite a time getting that working...


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PostPosted: Sat Jul 19, 2014 7:27 am 
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Druzyek wrote:
When I see neat things like this I always want to get one for myself to play with. A homebrew SBC with a satellite processor would be one of a kind. Here's one on eBay:

http://www.ebay.com/itm/1PC-NEW-HARRIS- ... 1e8795efff

BGA is no fun though and you might have quite a time getting that working...


I have a hunch that's PGA, and not BGA... unfortunate that the seller didn't think to show the bottom of the chip.


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PostPosted: Sat Jul 19, 2014 12:52 pm 
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Yes, PGA seems likely. While searching for confirmation I found this site/online book all about stack CPUs:
http://users.ece.cmu.edu/~koopman/stack ... ec4_5.html


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