Subject:
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(Handy-B) wrong connection...
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 6 Dec 1996 17:32:10 GMT
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Original-From:
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Peter Tabbers <fk96pta@student.hk*NoSpam*-r.se>
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Viewed:
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2305 times
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Hello,
I made a terrible mistake.
By mistake I connected the pos. side of the powerheader (10 V) to
the middle row of the digital ports (Vccc ; 5 V , (if I'm not mistaking)).
With this action I probably blew up (a) component(s) on my handyboard.
I think it might be the memory.
This because I am - able to download pcode_hb.s19
- not able to run IC
- no IC welcome message appears after powerstart
I hope someone can tell me which parts might be dammaged and tell how
to solve the problem. I am thinking of replacing the (memory) IC with
written on it : MCM60L256AP10 ZQQAG8841
By which type can I replace it; by any 32K battery-backed CMOS static RAM
or is the pinconfiguration non-standard?
Thanks in advance! greetings Peter Tabbers
fk96pta@student.hk-r.se
ps. below I have written down the messages that appear:
When I download the operating system (dl~ pcode_hb.s19)
the following (normal) messages appear:
Downloading 256 byte bootstrap (229 data)
Download successful
config is 0c
loading pcode_hb.s19
sending pcode_hb.s19 ............
done
If I powerstart the handyboard then, the IC welcome message does not appear.
When I try to run IC the following messages appear:
Attampting to link to board on port com2
Synchronizing with board
Pcode version 81.81 present on board
Incompatible pcode version, or pcode corrupt
Please use "dl" to reload pcode
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Message has 1 Reply:
 | | Re: (Handy-B) wrong connection...
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| (...) any normal cmos low power 28-pin (JEDEC standard) 32K RAM will work. You do not need a special battery backed variety. you also might have blown the 'hc373 chip, since that is part of the memory circuit. also check the 'hc132. hopefully the (...) (28 years ago, 6-Dec-96, to lugnet.robotics.handyboard)
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