Re: 6502/6510 ROM selection daughterboard

From: silverdr_at_wfmh.org.pl
Date: Sun, 3 Jun 2012 23:35:22 +0200
Message-Id: <14FF45AB-5565-4206-9E50-8C18F47DB81E@wfmh.org.pl>
On 2012-06-03, at 17:58, Michał Pleban wrote:

>> Above, I was thinking a daughterboard that would be installed in the
>> 6510 socket.
>
> The trouble with this approach is that on many motherboards the CPU  
> is not socketed.

I don't see this as a deal breaker type of problem. The same applies  
to ROMs. Yet people exchange them or replace with EPROM adapters, etc.

>> This approach would require some careful studying of the PLA truth
>> table, and there might be some glitches.
>
> I decoded the PLA equations from the truth table some time ago, can  
> supply.

Could you maybe publish it? On zimmers for example?

>> I am not sure that the CHAROM could be replaced in this way. I don't
>> think it can be replaced with a 6510 daughterboard either, at least  
>> not
>> without redirecting some PLA lines.
>
> No, any of these methods cannot replace character ROM.


For CPU it should work, right? But for VIC it remains tricky. VIC  
lines come into picture /me thinks..

-- 
SD!
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Received on 2012-06-03 22:00:44

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