On 10/27/2011 07:29 PM, crock wrote: > Hi Gerrit, > > The TED on the C16 board is 7360R7 week 10, 1984, ceramic. The one > inside the +4 is the same but I can't remember the week without popping > the case again. Thank you. Another little addition to my list of MOS chips where I try to collect not only the numbers but also all known revisions. R7 suggests that it took MOS a while to get that chip stable. > The one in the 232 is also ceramic but the heatsink is > epoxied to the top of the chip and I'm not prepared to chisel it off!!! I have a TED like that too. I doubt you can remove the heatsink without damaging the chip. > 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. > 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)? > Thanks for explaining the lack of reset on the TED, I'm still surprised > that the cost of laying out and producing a new CPU was worth it though.... From what I read, MOS had the 6502 as a core, so the 7501 shouldn't have been too hard to create. Especially since most of the extra logic was already done due to the I/O port in the 6510. 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. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2011-10-27 18:00:16
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