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Originally Posted by dissident
The TOD must not be set to zero and messed up this way. You can also get the difference from TOD before and after the demo/intro. But a TOD overflow must be checked.
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Yes. That might be a better solution.
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After analysing SetClock1.2 & 1.3 and ReadBattClock() in ROM I wrote this RTC-handler.
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As far as I can see it only works with MSM6242B RTCs, but not with the RICOH RTCs in an A3000 or A4000. The RICOH has a slightly different register layout (weekday has moved, for example).