AnyCPU http://anycpu.org/forum/ |
|
Looking for John Bell "82-300" (6502 board) Doc http://anycpu.org/forum/viewtopic.php?f=22&t=260 |
Page 1 of 1 |
Author: | Mike, K8LH [ Thu Dec 31, 2015 1:30 am ] | ||
Post subject: | Looking for John Bell "82-300" (6502 board) Doc | ||
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
|
Author: | Garth [ Thu Dec 31, 2015 2:27 am ] |
Post subject: | Re: Looking for John Bell "82-300" (6502 board) Doc |
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. |
Author: | Mike, K8LH [ Thu Dec 31, 2015 6:53 am ] |
Post subject: | Re: Looking for John Bell "82-300" (6502 board) Doc |
Hi Garth: I don't have one of these boards so I can't really trace it out. Cheerful regards, Mike |
Author: | BigEd [ Thu Dec 31, 2015 4:29 pm ] |
Post subject: | Re: Looking for John Bell "82-300" (6502 board) Doc |
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? ) |
Author: | Mike, K8LH [ Thu Jul 07, 2016 4:45 am ] |
Post subject: | Re: Looking for John Bell "82-300" (6502 board) Doc |
Special thanks to Mike, VE3IPK, for providing a digital copy of the John Bell 82-300 schematic... Cheerful regards, Mike |
Author: | Mike, K8LH [ Sat Oct 07, 2017 7:16 pm ] | ||
Post subject: | Re: Looking for John Bell "82-300" (6502 board) Doc | ||
A bit late, but... my interpretation of the hand drawn schematic that accompanies the John Bell "82-300" 6502 board. Cheerful regards, Mike
|
Author: | BigEd [ Sat Oct 07, 2017 8:59 pm ] |
Post subject: | Re: Looking for John Bell "82-300" (6502 board) Doc |
Thanks for following up! |
Author: | robfinch [ Sat Oct 07, 2017 9:22 pm ] |
Post subject: | Re: Looking for John Bell "82-300" (6502 board) Doc |
The schematic shows A6 on the 6532 as grounded. Is this correct ? That would limit memory to 64 bytes. |
Author: | Mike, K8LH [ Sat Oct 07, 2017 10:03 pm ] |
Post subject: | Re: Looking for John Bell "82-300" (6502 board) Doc |
Thanks, Robert. Good catch. Fixed... |
Page 1 of 1 | All times are UTC |
Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |