>> All the cpu's are 7501's and plastic. The earliest one is week 51, 1983. > > Are they all R1 or are there other revisions? I only have a single > 7501 which is an R1 from 2684. All the other CPUs are 8501R1. > The 7501's from late '83 have no revision number, the early '84 ones all say R1. The latest ones I have are from week 14, 1990 which are also R1! I don't know how much has to change to get a new revision number but those ones from 1990 run *MUCH* cooler than all the others, which get hot to the point of burning your fingers. I always heatsink them now. >> Two of the PLA's were ceramic, but sadly only one of them is still >> functional, from week 8, 84. > > The ceramic PLA I have is 1084. You do know that there is someone > selling a PLA replacement that can be used for the C64 and the 264 > systems (selected by jumper setting)? > Yes, I did. Fortunately for me, I have spares anyway! > > I also assume they expected better sales than they got. :) > > What does surprise me is that the 8501 was still made in 1990, looks > like MOS kept making spares even though the 264 line was dead. > IMHO, the cpu expires more frequently than the TED. I found a source of 8501's in China last year and got 12 working ones. I then bought several 'defective' +4's and 16's of ebay and got all of them working. ~70% had dead cpu's. Rob Message was sent through the cbm-hackers mailing listReceived on 2011-10-27 20:00:29
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