Re: 6502/6510 ROM selection daughterboard

From: Gerrit Heitsch <>
Date: Tue, 05 Jun 2012 17:52:55 +0200
Message-ID: <>
On 06/05/2012 05:28 PM, Michał Pleban wrote:
> Hello!
> Bil Herd wrote:
>> Does the community have the actual PLA terms as source for the various
>> devices or are they all/mostly reverse engineered?
> The only ones I found were for Commodore 500 - they are on the last page
> of schematics on Zimmers. I verified my equations and they appear to
> match. Apart from that, I never saw any equations directly from
> Commodore, only reverse engineered.

The system manual for the 264 series hat a PLA chart in it. I assume 
that it's for the 251641-02.


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Received on 2012-06-05 16:00:33

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