> On Sun, 20 Feb 2000, Patryk Zadarnowski wrote:
>
> > > On Sun, Feb 20, 2000 at 12:42:14PM +1100, Patryk Zadarnowski wrote:
> > > > One more thing about GPTs (I thought I'll leave that till last. ;)
> > > > Jochen Liedtke holds a German patent on them, although he will
> > > > probably be fairly easily convinced to give FreeBSD rights to use
> > > > them. I'll be happy to ask (if we're interested.)
> > >
> > > It looks like the hardware has to implement GPTs and know how to
> > > walk them. How can FreeBSD use them without hardware support ?
> >
> > No it doesn't. We've got software GPT implementations for both MIPS64 and
> > Alpha, and they're both peform very well in our somewhat hostile SASOS
> > conditions.
>
> So you have custom PALcode for Alpha on SASOS? We have been able to use
> OSF1 PALcode up to now which makes life a lot easier for supporting new
> hardware.
Sure. Mungi (our SASOS) runs on top of an L4 microkernel. If anything,
it improves portability: porting Mungi from MIPS to Alpha took
literally few hours of working out endianess-related bugs ;) (tell me
the same about FreeBSD ;P Of course using OSF1 PALcode simplifies life
for FreeBSD, but it's really not an option for our OS research.
Pat.
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