Subject:
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Re: Interests in non-GNU C compiler for RIS?
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Wed, 27 Oct 1999 16:17:58 GMT
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Viewed:
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1570 times
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Hello Luis, thanks for respomding (and thanks to others who have email me
privately...)
Luis Villa wrote:
> On Tue, 26 Oct 1999, Richard F. Man wrote:
> > And robotics is my first love - in fact, the company was
> > started when I try to productize my subsumption architecture based
> > multitasking executive...
>
> Ahah! Now *that* is interesting to me. Obviously (as the legOS HOWTO
> maintainer), a gcc replacement doesn't really interest me, unless you have
> a reliable solaris->h8300 cross-compiler, in which case maybe we can talk
> :) However, I think I (as well as many other people in the educational
> "market") would be very, very interested in seeing a really solid
> subsumption-based language environment for the lego. Is there a URL where
> I can get more info on this (if you are still in that biz?)
We got into the business selling REXIS (REal eXecutive for Intelligent Systems)
but stop after a couple years since the support cost is too high :-( I may
resurrect it one of these days. Perhaps a pre-built box like the RCX is just
the right platform. If you do a web search, you probably will ifnd some old
link. Look what I found:
REXIS
REXIS (Real-time EXecutive for Intelligent Systems) is a small
multi-tasking preemptive real-time executive for implementing control
programs for intelligent systems such as robotics and distributed
networks. It provides functions for
managing tasks, memory allocation, message ports, timers, and
event processing.
It is distributed as shareware at a low cost to
hobbyists / students. The current requirements for compiling
and running REXIS is an ANSI C HC11 cross compiler and a HC11
target with at least 24K of RAM. Other targets are under
consideration. For more information, please contact
Richard Man
P.O. Box 6
North Chelmsford, MA 01863
(phone+FAX) (508) 452-5203
imagecft@world.std.com, or
man@labrea.zko.dec.com
Wow, that's from 8, or 9 years ago! The contact address is of course, incorrect
:-)!
>
> > Please let me know what you think. The pricing on our current product is
> > $160-$199, but if there is a larger market for this, we can consider
> > dropping it to $50-$100 range. Our goal is to make money - this is our
> > day (and night and weekend) job, but if we do it, you can be sure that
> > it will be a very usable environment to program the RIS in - since I
> > will be one of the biggest users :-)
>
> Well, the subsumption thing would be probably strictly educational- so
> your market would be limited. OTOH, money might not be so much of an issue.
Not quite sure how to parse this: Are you saying that the market may be
limited, but people who want it will buy it, and the cost is not too much of a
problem?
>
> > Another interesting possibility is that I do not believe execution speed
> > is of primary concern, so instead of doing a native C compiler, may be
> > we can release a Virtual Machine based compiler. We can release the API
> > of the VM and the VM itself as Open Source for people to hack around
> > too. Doing this is also easier than doing a native compiler, so perhaps
> > we can release this faster.
>
> Again, I think this would be perfect for a subsumption language (if that
> is in fact what you have already done.) Base the VM on legOS, and just
> distribute the VM binary pre-compiled (so that people don't necessarily
> need to compile anything themselves.) Of course, I'm not sure where your
> profit fits into this model, but you've probably given that more thought
> than I have.
So one possibility that you are pointint out is that I can have a subsumption
language that compiles to a VM, this VM will sit on top of LegOS? REXIS was
just C library, but I have given thoughts to a robotics based language with
builtin subsumption semantics (that is based on Brook's L), and builtin fuzzy
logic to boot. Interested? LegOS or something like that would be a prerequisite
for the multitasking support. I may have to build it into the VM though...
>
> Looking forward to discussing this seriously with you-
> Luis
>
>
--
// richard
http://www.imagecraft.com
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Message is in Reply To:
 | | Re: Interests in non-GNU C compiler for RIS?
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| (...) Ahah! Now *that* is interesting to me. Obviously (as the legOS HOWTO maintainer), a gcc replacement doesn't really interest me, unless you have a reliable solaris->h8300 cross-compiler, in which case maybe we can talk :) However, I think I (as (...) (25 years ago, 27-Oct-99, to lugnet.robotics.rcx)
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