Date: Sun, 20 Feb 2000 23:33:08 +1100 From: Patryk Zadarnowski <patrykz@ilion.eu.org> To: Doug Rabson <dfr@nlsystems.com> Cc: Arun Sharma <adsharma@sharmas.dhs.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: 64bit OS? Message-ID: <200002201233.XAA04864@mycenae.ilion.eu.org> In-Reply-To: Your message of "Sun, 20 Feb 2000 12:05:30 -0000." <Pine.BSF.4.21.0002201203430.77743-100000@salmon.nlsystems.com>
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> 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. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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