[coreboot] [RFC] CMOS options

Andrew Goodbody andrew.goodbody at tadpole.com
Wed Dec 9 12:55:02 CET 2009

Stefan Reinauer wrote:
>> I noticed that century byte is happily ignored - need to check if it
>> really
>> collides.
> Is that good for anything? Does the BIOS need to care? I thought hwclock
> --sys-to-hc does that ;-)

Some implementations of the RTC will auto increment the century byte on 
a century roll over. I know we are past Y2K so this is unlikely to 
produce a bug in practice but there is the possibility for an unexpected 
change in the contents if that position is used for any other purpose.
It is a 'well known' position and can be read/written by an OS.


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