>> [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. :) It would be rather easier to test for the difference between 8250 and 8251 directly (see if the TOD is a BCD or binary counter). >>>> 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. Aww, but it fit so well :-) Is the 7 in 67xx/77xx/87xx the same thing? (I'm reading "gate array" as "random logic", none of these devices are gate arrays). Segher Message was sent through the cbm-hackers mailing listReceived on 2011-12-13 00:00:09
Archive generated by hypermail 2.2.0.