Date: Sat, 17 Jun 2000 11:19:13 -0700 From: Mike Smith <msmith@freebsd.org> To: =?ISO-8859-1?Q?G=E9rard_Roudier?= <groudier@club-internet.fr> Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: does the sym driver work with the xp1000 pci scsi controller? Message-ID: <200006171819.LAA00811@mass.osd.bsdi.com> In-Reply-To: Your message of "Sat, 17 Jun 2000 00:47:47 %2B0200." <Pine.LNX.4.10.10006170021340.2159-100000@linux.local>
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> > > > 4.0R HARDWARE.TXT? The only thing that I wrote in there that fain= tly appears > > > > relevant is: > > > > = > > > > "Expansion: > > > > Don't try to use NCR/Symbios-chip based SCSI adapters in the PCI = slots > > > > connected to hose 1. There is a not-yet-found FreeBSD bug that pr= events this > > > > from working correctly. Not all VGA cards will work behind the PC= I-PCI > > > > bridge (so in slots 4 & 5). Only cards that implement VGA-legacy = adressing > > > > correctly will work. Workaround is to put the VGA card 'before' t= he bridge." > = > Putting a VGA card behind a PCI-to-PCI bridge is probably not that clev= er, > but it does not seem that 2127X (X=FF) core logics used with 21264's > utilize a PCI-to-PCI bridge for PCI BUS #1 (I mean both PCI BUS > controllers seem to be attached to the system BUS). Note that I have be= en > unable to find any detailed documentation about core logics used for th= e > 21264, so I may be just wrong on that point. :( It varies between systems. The above comment is based on my experiences = with a DS20, which has two hoses, each directly connected to the nexus, = each hose feeding a PCI bus. The VGA issue is so bad that even the SRM = can't use a card that's not on hose 0. The Symbios issue may or may not = be our fault (I think it probably is), and until we can be sure about = that it's not worth a witchunt. -- = \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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