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 Looking for John Bell "82-300" (6502 board) Doc 
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Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
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


Attachments:
John Bell 82-300 Board.JPG
John Bell 82-300 Board.JPG [ 41.27 KiB | Viewed 7491 times ]
Thu Dec 31, 2015 1:30 am
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Joined: Tue Dec 11, 2012 8:03 am
Posts: 271
Location: California
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.

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http://WilsonMinesCo.com/ lots of 6502 resources


Thu Dec 31, 2015 2:27 am
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Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
Hi Garth:

I don't have one of these boards so I can't really trace it out.

Cheerful regards, Mike


Thu Dec 31, 2015 6:53 am
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Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1280
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?
)


Thu Dec 31, 2015 4:29 pm
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Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
Special thanks to Mike, VE3IPK, for providing a digital copy of the John Bell 82-300 schematic...

Cheerful regards, Mike


Thu Jul 07, 2016 4:45 am
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Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
A bit late, but... my interpretation of the hand drawn schematic that accompanies the John Bell "82-300" 6502 board.

Cheerful regards, Mike


Attachments:
Bell 6502 #2.png
Bell 6502 #2.png [ 287.81 KiB | Viewed 6268 times ]


Last edited by Mike, K8LH on Thu Oct 26, 2017 10:04 am, edited 6 times in total.

Sat Oct 07, 2017 7:16 pm
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Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1280
Thanks for following up!


Sat Oct 07, 2017 8:59 pm
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Joined: Sat Feb 02, 2013 9:40 am
Posts: 920
Location: Canada
The schematic shows A6 on the 6532 as grounded. Is this correct ? That would limit memory to 64 bytes.

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Robert Finch http://www.finitron.ca


Sat Oct 07, 2017 9:22 pm
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Joined: Mon May 25, 2015 12:51 am
Posts: 21
Location: Michigan, USA
Thanks, Robert. Good catch. Fixed...


Sat Oct 07, 2017 10:03 pm
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