Subject:
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How much memory finally?
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Wed, 9 Feb 2000 15:15:30 GMT
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Viewed:
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1511 times
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I'm trying to figure out how much memory the RCX has.
Many sources claims that it has
- 16k rom
- 16k ram for the firmware
- 6k reserved for our own programs
Does this mean the RCX has 22k of RAM memory? What an odd number...
Also, when I perform MemMap, the final number is
26 000 (or so). The end of the firmware is located
at 20 000 (or so). This is where I don't understand.
Is the firmware 16k or 20k? I know it has to be 16384 bytes
long, so why Memmap returns 20 000?
If someone can explain how to read these numbers out of the
Memmap commands, please tell me.
Denis.
--
Denis Cousineau, Postdoc *****************************
Cognitive psychology * *
Indiana University * Etudiant devant l'eternel *
Psychology Building * *
Bloomington, 47405 *****************************
Office: (812) 856-5217 Fax: (812) 855-1086
E-mail: decousin@indiana.edu http://Prelude.PSY.UMontreal.CA/~cousined
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Message has 3 Replies:
 | | Re: How much memory finally?
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| (...) If I remember correctly the RCX has a 16kROM for the basic routines. It has 32k RAM for firmware and programs. The scout has 32K ROM and only 1K RAM (400bytes for your program) Dean (25 years ago, 9-Feb-00, to lugnet.robotics.rcx)
| | | Re: How much memory finally?
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| (...) I believe it has a 16K ROM and 32K SRAM. Within the 32K, 16K is occupied by the 'firmware' downloaded to the RCX. About 6K is reserved for bytecode program space and the datalog. Presumably the rest is working memory for the firmware (stack, (...) (25 years ago, 10-Feb-00, to lugnet.robotics.rcx)
| | | Re: How much memory finally?
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| Here's the latest update. Hope we will get a clear picture of this #@$@ memory after all. The point is that the RCX processor can address 64k of memory, so let's divide this range into 4 equal area of 16k. (note:16k or 16384, in hex is 0x4000). (...) (25 years ago, 10-Feb-00, to lugnet.robotics.rcx)
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