Subject:
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Re: RCX capabilities
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 13 Nov 1999 03:09:24 GMT
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Viewed:
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629 times
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On Fri, 12 Nov 1999, Rich Carreiro wrote:
> Is there a good FAQ anywhere that talks about the exact capabilities
> of the RCX (voltage/current specs of the inputs and outputs, CPU type,
> speed and memory) including its software characteristings?
No real FAQ, at least not at that detail. What you probably want to look
at is http://www.crynwr.com/lego-robotics/ which is the best "in one
place" compendium of info on the web.
> Also, I've seen a thread over in r.t.l where someone says the RCX has
> no variables. And I've seen someone here say that he was using NQC (I
> know that that is) and so only had a limited variable space.
The native lego firmware has only 32 variables. This same firmware is
used by NQC, so it has the same limitation.
> So I'm now curious about what computational limits in the RCS exist
> because of its hardware,
32K RAM, no FPU. Those are the only real hardware limitations.
> what computational limits exist because of
> LEGO-supplied firmware, and what computation limits exist because of
> progamming environments (specifically, say, NQC and the RIS PC-based
> software that comes with Mindstorms).
The three can't really be separated, as NQC and the RIS software both use
the LEGO firmware. As far as I understand it, the main limitations are
the 32 variables and 8(?) thread limitations.
However, the firmware can be replaced, and (as a result) the limitations
removed. I believe the main contenders in that arena are legOS
(www.noga.de/legOS) and
pbForth(hempeldesigngroup.com/lego/pbFORTH/index.html), both of which
have unlimited variables. legOS also has "full" threading capabilities.
As far as I know, these are the only alternate programming environments
that do away with the LEGO firmware.
> If there are pointers to this information on the net, that would be
> great, too.
No real collection of information, I'm afraid. These lunget lists are the
closest you can get to a lego braintrust outside of lego- so you've at
least found the right place to start. Good luck-
Luis
> --
> Rich Carreiro rlcarr@animato.arlington.ma.us
> "I've come to the conclusion that there should be a tort for wasting my
> time if you're being an idiot." -- paraphrase of Stephen T. Middlebrook
>
>
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Profanity is the one language that all programmers understand.
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Message has 1 Reply:
 | | Re: RCX capabilities
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| (...) I hate to disagree with you, but Russel Nelson's site probably only has one drawback - the volume if information and links make finding what you're looking for a challenge. look at (URL) and find the CPU and Hardware sections. While you are (...) (25 years ago, 13-Nov-99, to lugnet.robotics)
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Message is in Reply To:
| | RCX capabilities
|
| Is there a good FAQ anywhere that talks about the exact capabilities of the RCX (voltage/current specs of the inputs and outputs, CPU type, speed and memory) including its software characteristings? Also, I've seen a thread over in r.t.l where (...) (25 years ago, 12-Nov-99, to lugnet.robotics)
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