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 don’t 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 Message was sent through the cbm-hackers mailing listReceived on 2013-05-01 22:00:05
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