Electronics > Projects, Designs, and Technical Stuff
Cloning a Commodore PET-2001
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james_s:
That's a nice tidy looking board. Mounting holes in the corners, nice clean traces without any weird angles, looks good.
kizmit99:
Looking good  :-+
I just wanted to drop a note to say I'm enjoying watching this project progress.  While I don't post much here, I do post on other forums and I know that sometimes when you're updating progress on a long-term build that you can begin to wonder whether or not you're just talking to yourself.  So this is just to let you know that your updates are appreciated.  Thanks for posting!
GK:
Thanks for the comments.

I designed the board along the same rules as the video generator board to make it very easy to assemble and trouble shoot and not to cause any hassle with even the cheapest PCB fab. All tracks are routed out on a 50 thou grid spacing. This did make for a rather large board, but I guess a retro clone of a PET just wouldn't be right on anything else  :D
GK:
Parts arrived yesterday, finished soldering up the motherboard this afternoon. The next step will be to layout a little board for my PS-2 keyboard interface and organise the hardware and connectors, etc, for completing this project into an enclosure. I'm going to assemble the computer into a 2U 19" rack case, with all of the I/O connectors and control switches mounted on the front panel.   

I also need to layout a small PCB for an analogue circuit to interface one of the PETs two digital cassette drive ports to general purpose/standard "mic." and "line-out" signal I/O for loading and saving programs to a non-Commodore audio recording/playback device. I originally thought to install this interface board inside the PETs enclosure, permanently plugged into cassette port #2 on the motherboard, but I now think I'll build up a "deluxe" version of this device as a separate stand-alone project in its own enclosure, as I'll be able to use such an interface to connect my other Commodore computers to external audio recorders too.     
 
I'm eager to get this project done and off the bench now as I have the circuitry for the TRS-80 clone pretty much done on paper now. Should be able to post some preliminary breadboard TRS-80 action in the not too distant future......  :D

Delta:
To echo Kizmitt's comments, I haven't posted as I have precisely zero to contribute.  But as a C64 man and a fan of vintage electronics, I have been following with great interest, and think your project is bloody brilliant!
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