[ntp:questions] serialPPS+gpsd+ntpd large offset & jitter

David Woolley david at ex.djwhome.demon.invalid
Fri Jan 14 07:49:34 UTC 2011


Mike S wrote:

> If you do a bit of research, I think you'll find that the 32768 Hz input 
> to the RTC clock isn't even exposed on most PCs. A battery supported RTC 

It wasn't part of the PC architecture, but it was part of the PC AT 
architecture, and possibly of the PC XT.  All modern Intel Architecture 
PCs are descendants of the AT.  I've got the AT circuit diagram and can 
tell you the actual chip used, if you want.




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