On Sat, Mar 01, 2003 at 06:57:11PM -0500, Hank wrote:
> I guess have a couple of questions? How does the system clock keep time
> if it does not
> use the hardware clock?
The system clock is tied to the timer interrupt. Reading the hardware
clock is too expensive in terms of time to do regularly.
> What exactly is the problem with the 900 series? Why can't the system
> clock copy itself
> to the hardware clock during shutdown and reboot?
I suspect that there's a bug in the hwclock routines in the kernel. It
decides how to read the actual hardware clock based on what ADB controller
the machine has, since on most Macs it is actually accessed through the
ADB routines. This means that it tries to treat the Q900 and Q950 like
the IIfx, but I suspect that it while it's right on the IIfx, the Q900
and Q950 actually need a different access method. It's been a problem
as long as I've been involved, and noone has ever cared to fix it since
as far as I know, those two models are the only ones that work at all
but don't have hwclock support working. I have a IIfx, so I know it
works, but I don't have a Q900 or Q950.
Brad Boyer
[EMAIL PROTECTED]
