RE: PLA replacement for C64

From: didier derny <>
Date: Thu, 30 Apr 2015 21:30:46 +0200
Message-ID: <000001d0837c$2856b9a0$79042ce0$@org>
Bingo! It works! Just replaced the PLA!

I was sure the guy who sold me the "broken" board had not really done any
effort to repair it

He is just a scavenger, collecting chips on a socket :)

I think I paid 2 or 3 euros :)  as this board only have 2 sockets it was
almost complete
The 6581 was gone, and the PLA broken

Thanks to all for your advices


-----Message d'origine-----
De :
[] De la part de
Envoyé : jeudi 30 avril 2015 16:27
À :
Objet : Re: PLA replacement for C64

On 2015-04-30 07:21, Baltissen, GJPAA (Ruud) wrote:
> Hallo Didier,
>> One strange things in my tests, with a power cartridge I got the 
>> power cartridge screen garbaged but possible to recognize the screen
> This might hint to a broken ROM or a PLA not addressing the ROM 
> correctly. I must admit that I haven't any idea at all what the 6510 
> does when it runs into a KILL opcode but what you described in a 
> previous email looks like that. The above confirms IMHO that it is NOT 
> the 6510 causing your troubles

Right, if the screen is to be recognised means that the CPU has done at
least part of its job.

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Received on 2015-04-30 20:00:06

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