Subject:
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Re: What I would do (2)
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 27 Jan 2006 22:58:30 GMT
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Viewed:
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1856 times
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In lugnet.robotics, Ed Manlove wrote:
> In lugnet.robotics, Alexander Sack wrote:
> >
> > I'm not so sure about this. Figure its an ARM7 clocked way below 50Mhz (for
> > power) and has 64k of memory. How much runtime state can you really process
> > with 64k after the kernel and sensor/motor processes are loaded?
>
>
> The processor speed (even underclocked) will not be an issue.
Didn't say it was! :-)!
> There real issue which I see many people have talked about is the amount of
> memory will be in the NXT.
Bingo!
> On the website for uCOS-II there is a RAM calculation (for the Intel 80x86
> architecture) indicating the total amount of RAM required for the kernel. The
> full kernel using argument checking on the Intel processor is 20.5k or about a
> third of the 64k memory.
I'm running it now and its quite a nice little OS. Like we both said, the real
work is just asking tasks to manage the specific resources of the NXT.
> I can't remember what percentage of total memory
> legOS/brickOS took within the RCX. There should be enough remaining to hold
> most user applications.
Again, totally agree (as I stated in my last post). But if you need real
complexity, an event/messaging passing environment maybe better suited. Having
the ability to work with multiple NXTs over Bluetooth just sounds fantastic.
> As a point of reference the Apollo Guidiance Computer had only 36,000 15-bit
> words or 72k memory space. [See
> http://ed-thelen.org/comp-hist/TheCompMusRep/TCMR-V02.html].
You do have a knack for listing some very cool links! Thanks Ed!
-aps
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Message is in Reply To:
 | | Re: What I would do (2)
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| (...) The processor speed (even underclocked) will not be an issue. There real issue which I see many people have talked about is the amount of memory will be in the NXT. On the website for uCOS-II there is a RAM calculation (for the Intel 80x86 (...) (18 years ago, 27-Jan-06, to lugnet.robotics)
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