Subject:
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Re: mindstorms NXT and memory
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 7 Jan 2006 19:15:24 GMT
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Viewed:
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8248 times
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In lugnet.robotics, William Grant tanarrifujitsu@optusnet.com.au wrote:
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Ka-On Lee wrote:
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NXT Spec From
LEGO Service FAQ
• 32-bit ARM7 microprocessor
• 256 Kbytes FLASH, 64 Kbytes RAM
• 8-bit microprocessor
• 4 Kbytes FLASH, 512 Byte RAM
Some flash is nice but 64K RAM is just too little. We can forget about doing
voice processing.
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64K RAM!? That’s absolutely ludicrous! The RCX has 32kb entirely of
programmable memory (if I remember correctly), and that is just alright.
64kb is not much space to work in at all in this era!
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Actually, 64K of RAM is quite a bit. You have to remember that with the RCX you
had 32K for everything. With the NXT all of the program code will go into
(and run directly from) the 256K of flash -- this includes things that take up
the most space: text, constant tables for state machines, etc.
The amount of RAM you need is very small. Micro-controllers I’ve used for custom
handhelds, engine controllers and transmission controllers (all real-world and
done in the last 2-3 years) have had at most 8K of RAM. As long as you have
enough flash and know how to make the most of it you can do a lot of really
interesting stuff.
All around this is a really big step up.
I’m curious if we’ll be able to use the 8-bit uC or if it is dedicated to
managing the motors and sensors (off loading basic driver functionality but not
being re-programmable).
Michael
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Message has 1 Reply:
 | | Re: mindstorms NXT and memory
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| (...) It depends where your ambitions lie. If you want to analyse audio or video or map your environment somehow - then 64Kb is pathetically small. If all you want is something that's just a small step ahead of an RCX then it's plenty. Of course you (...) (18 years ago, 8-Jan-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: mindstorms NXT
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| (...) 64K RAM!? That's absolutely ludicrous! The RCX has 32kb entirely of programmable memory (if I remember correctly), and that is just alright. 64kb is not much space to work in at all in this era! Anyway, a dot-matrix display is nice, as is (...) (18 years ago, 7-Jan-06, to lugnet.robotics)
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