Re: is there any easy way to upgrade a C116 to 64k

From: Rob Clarke <crock_at_clarke-family.org.uk>
Date: Wed, 01 May 2013 23:12:42 +0200
Message-ID: <5181854A.2050905@clarke-family.org.uk>
On 01/05/2013 18:07, Gerrit Heitsch wrote:
> On 05/01/2013 03:15 PM, Bil Herd wrote:
>> I am (pleasantly) surprised that _any_ of the units really work after 30
>> years given the history we had with some of the IC production 
>> (passivation,
>> ion implanter) and I donít remember where the 7500 fell in whether it 
>> was a
>> finished design rule set or whether all  long-term bets are off unless
>> you're on the 8500.
>
> Well, the 8501R1 ist also not known for a long life. Back when I had 
> my first C16, I removed the 7805 from the case (put it outside with a 
> larger heatsink) and put heatsinks on CPU and TED. Never had any trouble.
>
> MOS did make a 8501R4 in 1986 and there are even 8501 with a 1990 
> datecode. Those are rumored to last a lot longer.
>
Bil should know this as I gave him a C116 with a 1990 CSG 8501. :-)

The CSG 8501's do not draw any less power, but I assume it's better 
distributed as they run ~15c cooler.

Rob



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