On 12/11/2011 09:40 PM, Segher Boessenkool wrote: > [206A] > >>>> Interesting! I suspect that is an 8520 actually... Can you test that? >>> >>> It's soldered to a C64 mainboard and behaves like a 6526A as far as >>> the software goes. The 8520 doesn't have the RTC but a 24Bit timer >>> instead as far as I know, so I think you'd notice if you tried to >>> use a 8520 instead of a 6526. >> >> Not if you do not use any program that uses the TOD. And there are not >> many that do. The KERNAL does not use the TOD at all. > > Yep, exactly. Well, one should be able to test that by plugging a real 8520 into a C64 board and then trying some software. If there is a program that complains/crashes, then we know for sure that the 6526A marked '206A' is not a 8520. :) >>>> Supposedly they also did an 852x that has only the low four ports (or >>>> the rest is not functional, anyway), i.e. the two parallel ports only; >>>> it was called something like 5210 (I forgot the exact name, and cannot >>>> find it anymore). >>> >>> 5710 if I remember right. >> >> The 5710 from the 128DCR (and 1571CR)? > > That's the one. Pretty obvious how they came up with that chip name, > heh :-) Well... 5xxx = CMOS, x7xx = gate arrays. See also 5717, 5719 and 5721. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2011-12-12 17:00:04
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