Re: Will pay good money for NON working PET 2001 motherboard.

From: Philip Lord <>
Date: Sat, 07 Nov 2009 22:59:33 +0900
Message-id: <> that I have a little more time I thought I'd explain myself a  
little better.

As fate may have it, a friend of a friend had a dead PET 2001 here in  
Japan, and when I spoke with him on the phone he said he was fine if I  
took the motherboard. He told me that he had no desire to actually  
have a 'working' machine (strange!!!), but he wants to keep his  
machine and if I fix his board then he'd need me to find him another  
non working board as a replacement. So if anyone has one that is in  
bad shape, I'll take it.

Anyway, he posted me the board, and it arrived a few days ago, and it  
seems to be a standard REV B board (unlike the Japanese board that I'm  
hoping to send to Ethan soon). I spent a good part of Saturday  
troubleshooting it. Initially the screen was just random characters,  
this is good news as it confirms that my power supply is actually  
working. My monitor does seem to have a crazy wobble which I'll also  
need to fix at some point.

After spending quite some time first cleaning the grubby board, then  
swapping around and replacing the 2114 rams it suddenly sprang to  

First thing I noticed was that there were many keys not working or  
working sporadically, however I was still able to quickly write a  
'hello world' program to confirm that the basic was function  
correctly. All seemed good until I tried to load a tape. After typing  
'LOAD' and pressing return the computer would freeze. I would not get  
the 'press play now' message, and the tape drive would no longer  
function. Turning the machine off and on again brought the machine  
back to life, and the tape drive was able to move again through FF,  
REW and PLAY buttons. Typing LOAD or SAVE would lock everything up  

Now for more bad news. Today as I was running a simple for next loop  
the screen suddenly went blank. I pressed the run/stop button and  
there was the flashing cursor, however, whatever I type doesn't show  
up on screen, it's as if I'm typing spaces. I restarted the machine  
again, and after all my hard work I was devastated to see that the  
'Commodore Basic' greeting screen was not displaying either, just the  
flashing cursor.
looking closely at the character ROM, it seems to have been replaced  
with and adaptor with another ROM soldered (not socketed) to the top  
of that. On the adaptor is written '2316E PCB ADPTR'. The ROM is an  
old ceramic type with gold legs and the top is rusted up enough so  
that it is impossible to tell exactly what it is :-(

Anyway, I'm guessing that maybe the character generator ROM has died???

As for the LOAD/SAVE tape freezes, I have no idea.

If anyone has any thoughts, please let me know.
Thanks for your time.


On Nov 7, 2009, at 1:43 PM, Philip Lord wrote:

> OK, I've downgraded my request.
> Now I'm looking for a non-functional Pet 2001b motherboard, any  
> condition (can be missing parts)
> Thanks in advance.
> Phil
> On Nov 5, 2009, at 5:06 PM, Philip Lord wrote:
>> Sorry for the delayed reply. I just moved apartments and have only  
>> just got internet up and running. I've been surviving on my iphone,  
>> but it wouldn't allow me to post to the list.
>> Ruud, thanks for the offer, I really appreciate it, however Ethan  
>> has kindly offered to take a look at my board.
>> The computer is still packed away in one of the many boxes that are  
>> scattered around the rooms. Need to track it down soon.
>> Thanks again
>> Philip
>> On Oct 26, 2009, at 10:43 PM, wrote:
>>> Hallo Phil,
>>>> ...anyone?
>>> If no other takers and you dare to send it over the Atlantic sea,  
>>> I'll
>>> give it a try.
>>> --
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Received on 2009-11-07 15:00:04

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