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It is currently Fri Nov 01, 2024 12:02 am
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Looking for John Bell "82-300" (6502 board) Doc
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Mike, K8LH
Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
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Greetings...
Has anyone got an electronic copy of the John Bell 82-300 board documentation, please? I'm looking for the schematic with the pin out for the 26-pin connector.
TIA...
Happy Holidays and cheerful regards, Mike
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| Thu Dec 31, 2015 1:30 am |
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Garth
Joined: Tue Dec 11, 2012 8:03 am
Posts: 285
Location: California
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I haven't heard of it, but it should be pretty easy to trace it out or use a DMM. The RIOT allowed a full computer board with very few parts for its day.
_________________http://WilsonMinesCo.com/ lots of 6502 resources
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| Thu Dec 31, 2015 2:27 am |
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Mike, K8LH
Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
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Hi Garth:
I don't have one of these boards so I can't really trace it out.
Cheerful regards, Mike
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| Thu Dec 31, 2015 6:53 am |
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BigEd
Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1803
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Probably also worth asking over at forum.6502.org ( I see now you've already found and used the thread at http://www.vintage-computer.com/vcforum ... 31954.html- did you mail Bigjeff there? )
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| Thu Dec 31, 2015 4:29 pm |
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Mike, K8LH
Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
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Special thanks to Mike, VE3IPK, for providing a digital copy of the John Bell 82-300 schematic...
Cheerful regards, Mike
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| Thu Jul 07, 2016 4:45 am |
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Mike, K8LH
Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
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A bit late, but... my interpretation of the hand drawn schematic that accompanies the John Bell "82-300" 6502 board.
Cheerful regards, Mike
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Last edited by Mike, K8LH on Thu Oct 26, 2017 10:04 am, edited 6 times in total.
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| Sat Oct 07, 2017 7:16 pm |
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BigEd
Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1803
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Thanks for following up!
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| Sat Oct 07, 2017 8:59 pm |
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robfinch
Joined: Sat Feb 02, 2013 9:40 am
Posts: 2205
Location: Canada
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The schematic shows A6 on the 6532 as grounded. Is this correct ? That would limit memory to 64 bytes.
_________________Robert Finch http://www.finitron.ca
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| Sat Oct 07, 2017 9:22 pm |
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Mike, K8LH
Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
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Thanks, Robert. Good catch. Fixed...
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| Sat Oct 07, 2017 10:03 pm |
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