Subject:
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Re: ??? Last minute sanity checking for a new board
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 8 Apr 1997 23:34:37 GMT
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Original-From:
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Fred G. Martin <fredm@media.IHATESPAMmit.edu>
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Viewed:
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1510 times
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this is basically right,
read the "appendixb" document listed on the tech docs page for this
kind of info.......
re: hb board size, it's sized so it will fit into a commercial plastic
enclosure that holds an 8 cell AA battery pack.
-fred
http://el.www.media.mit.edu/groups/el/projects/handy-board/techdocs/
In your message you said:
>
>
> +------------------------------------------------------------------------+
> | NOTICE! I'm posting from a host that is not always available. If your |
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>
> Fred (or anybody)-
>
> I'm doing some last minute sanity-checking on a project design and I just
> want to make certain I've "groked" these things correctly- in the HB, the
> memory is mapped high ($8000+)- right? The area from $4000-6fff is not
> used for anything "critical" except for expansion port I/O- If I used a
> different expansion scheme that "rearranged" the Yx port selects (so there
> are more crammed into the same area) the only thing that "breaks" are any
> port address references for that area in the HB library and possibly some
> similar type things in the pcode- correct? And since to the best of my
> knowledge, the Y0-Y5 selects aren't used for any "official" HB calls, the
> only thing that _really_ breaks is contributed code that uses these
> addresses (assuming I make provisions to handle $6000-$7000 (Y6-Y7 calls)-
> right? Last question :-) Is there some basis for the HB dimensions or was
> it arbitrarily arrived at?
>
> Thanks for your assistance!
>
> John Whitten
> brat@naxs.com
>
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Message has 1 Reply:
 | | sencdr0.asm
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| In the program sencdr0.asm, what does the line: BRCLR ADCTL,X $80 * for? Thanks for any help. :) ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The (...) (27 years ago, 12-Apr-97, to lugnet.robotics.handyboard)
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