Re: Reboot after power failure

[Michael <macallan%netbsd.org@localhost>]

Hello,

On Dec 2, 2008, at 2:05 PM, Daniel Eggert wrote:

> On Dec 2, 2008, at 11:02 AM, Michael wrote:
>
> > Hello,
> >
> > On Dec 2, 2008, at 1:49 PM, Daniel Eggert wrote:
> >
> > > Is it possible to set a macppc machine to automatically reboot  
> > > after power failure?
> > >
> > > OpenBSD seems to have this working in OpenBSD 4.1:
> > >
> > > <http://www.openbsd.org/41.html>
> > > "The OpenBSD/macppc platform now automatically turns the machine  
> > > back on following an unexpected loss of power."
> > >
> > > Is it some sort of OpenFirmware thing?
> >
> > There's a bit for it in nvram, Apple likes to call it 'file server  
> > mode'. Not sure you can set it from OF.
> >
> > have fun
> > Michael
>
> How would I go about setting that bit?

A few lines in the pmu or cuda driver ( depending what mac you're  
talking about ) should do it.. I /think/ we had code for it at some  
point, probably set it on a few models that were intended to be servers.
Anyway, this bit is managed by the onboard microcontroller ( cuda or  
pmu, depending what model you have ) and thus can be set or reset by  
sending commands to it. Shouldn't be too difficult to do. Also, I'm  
not sure all models support it.

have fun
Michael