Subject:
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Expanding the memory of the handyboard
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 16 Feb 1998 19:50:17 GMT
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Original-From:
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Kevin B. Smith <KBSMITH@ET.BYU.spamlessEDU>
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Viewed:
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1385 times
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A number of students that used the handyboard in our Mechatronics
competition needed substantially more memory than the 16,320 bytes
currently available. What options are there to add memory to the
handyboard?
Thanks to everyone who contributes to handyboard@media.mit.edu
Kevin B. Smith
kbsmith@byu.edu
-----Original Message-----
From: Fred G. Martin [SMTP:fredm@media.mit.edu]
Sent: Thursday, February 12, 1998 7:46 AM
To: patrick@surfari.net
Cc: handyboard@media.mit.edu
Subject: Re: Fw: questions on IC
re: #1,
in a sense, the stuff you downloaded *is* there, but IC doesn't know
how to access it until you re-download. So yes, each time you restart
IC, you must re-download your project.
re: #2.
there are not good reporting tools for memory usage. i think the
'mem' command reports free memeory in the IC application, which isn't
that relevant.
the way that the 6811 memory is partitioned is follows, there is
basically 16K for user code. There is no way to free up more space
without recompiling IC. Here are some more details.
user program object code + user global variables 16320 bytes available
runtime OS 7936 bytes used
stack space for user processes 6656 bytes used
buffer for interaction process 256 bytes used
buffer for printing 256 bytes used
When downloading your code, IC tells you how many bytes are going
down. You've got 16,320 available.
Fred
In your message you said:
> This is a multi-part message in MIME format.
>
> ------=_NextPart_000_01BD36FA.F5C69CC0
> Content-Type: text/plain; charset=ISO-8859-1
> Content-Transfer-Encoding: 7bit
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> If there is ANYONE out there who can give me just a little guidance on
> these two issues, or at least the first and most important one, I would
> certainly appreciate hearing from them... an extended treatise isn't
> necessary, just a short answer will do...
> thanks,
> -patrick
> ----------
> > From: Patrick Cutts <patrick@surfari.net>
> > To: handyboard@media.mit.edu
> > Subject: questions on IC
> > Date: Monday, February 09, 1998 10:33 PM
> >
> > Hi all,
> > These questions are probably pretty trivial, but please bear with me, • as
> I
> > have only been using IC for 2 days:
> > 1. I was under the impression that the files I loaded onto my HB would
> > remain there when I turn it off, I mean, the pcode does, but when I • load
> > files or functions (for example lib_hb.c) using IC, they aren't there • the
> > next time I run IC. Is this normal? If so, and they get deleted when • I
> > quit IC, what do I need to do when I want to cut the umbilical and have • my
> > robot roll around on its own?
> >
> > 2. When I use the 'mem' command in IC, I get '<some number> of bytes • on
> > host', where <some number> appears to be 32K minus the size of the • files
> I
> > have loaded. Is this how much memory is left on my HB or my PC? If it
> > shows how much memory is left on my PC, is there a way to find out how • much
> > of the 32K is still available on the HB?
> >
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Message has 1 Reply:
 | | Re: Expanding the memory of the handyboard
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| Dear Kevin, Please forgive this non-answering of your question, but I am curious as to what kinds of hardware projects/software objectives were your students working on when they ran out of 'hc11 memory, and how did they deal with this circumstance? (...) (27 years ago, 16-Feb-98, to lugnet.robotics.handyboard)
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