On Apr 14 at 17:04, Juergen Hannken-Illjes spoke:

> On Wed, Apr 14, 2004 at 05:02:01PM +0200, Hanspeter Roth wrote:
> > Hello,
> > 
> > how can one adjust the interpretation of the bios time?
> > When rebooting from another OS (Windows, FreeBSD) NetBSD seems to
> > have a different time even though /etc/localtime is customized.
> > It seems to me that NetBSD thinks the bios time is GMT.
> > Can one make NetBSD to think interpret the bios time differently?
> 
> man options:
> 
> 	options RTC_OFFSET=integer
> 	The kernel (and typically the hardware battery backed-up clock on those
> 	machines that have one) keeps time in UTC (Universal Coordinated Time,
> 	once known as GMT, or Greenwich Mean Time) and not in the time of the
> 	local time zone.  The RTC_OFFSET option is used on some ports (such as
> 	the i386) to tell the kernel that the hardware clock is offset from UTC
> 	by the specified number of minutes.
> 	...

Thank you for pointing out this approach. 
I found a means to change RTC_OFFSET with gdb after building the kernel:

http://ezine.daemonnews.org/200304/rtc-offset.html

-Hanspeter