On Tue, Jan 11, 2000, Bill Studenmund <wrstuden@nas.nasa.gov> wrote:

>> Plus, adding RTAS support also wins us nvram access and the ability to
>> beep. :)
>
>Well, the problem is that we're also supposed to shut things down when
>we're running, by quiescing OF. As I understand it, THAT requirement
>shoots down nvram access and beeping. :-(

I theory, RTAS is not killed by quiesce since it's meant to be used by
the host OS after the quiesce call. In practice, RTAS doesn't work. So
you'll have to write direct PCI config access routines and NVRAM access.

On the Uni-N machines, NVRAM is actually a flash, I'm currently trying to
figure out the flash algorithm.