CBM KIM-1 Rev G Restoration
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CBM KIM-1 Rev G Restoration |
by Bill Degnan - 05/19/2013 10:27 |
 More to come. Reply |
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KIM U1 Socket Replaced |
by Bill Degnan - 07/08/2013 10:36 |
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Removed the 6502 socket (U1) and discovered a lot of scratches which might explain why we're not getting the right signals, seems like they have created a short in the board.
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Another KIM walks again |
by Bill Degnan - 08/26/2014 13:16 |
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I had extensively worked through the other KIM I have (KIM rev D thread which gave me new knowledge to test this one as well.
Most important, I learned one must ground pin K on the application connector even if not applying 12V power. The repairs I made to the socket and other little cleanup I did to bring the KIM-G back to life (don't remember everything) may have helped or may not have been necessary. The machine sprang to life with pin K grounded; the ROMs return the correct values. I need to do more testing, but this is a great step forward. Reply |
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Photos Commodore KIM-1 Rev G |
by Bill Degnan - 08/27/2014 10:27 |
 Yes this is the Commodore KIM-1 Rev G from the poster I produced in 2006. Click image for larger view.
 Photo of the power leads I added to the application connector. I can disconnect these leads safely without removing the application connector adapter each time. Click image for larger view.
 Here's an image of the LED display. click image for larger view.
 View of the KIM-1 powered on. Click image for larger view.
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Started project to restore a non-functioning Commodore Kim-1 (Rev G). Working with a number of attendees at the Spring MARCH workshop we concluded that the 6502 socket was bad. I also replaced the dual timer chip in U25.