Date: Mon, 11 Mar 1996 13:36:00 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: rgrimes@GndRsh.aac.dev.com (Rodney W. Grimes) Cc: terry@lambert.org, imb@scgt.oz.au, current@freebsd.org Subject: Re: AMD doesn't like SNAP! (panic: unwire: page not in pmap) Message-ID: <199603112036.NAA03822@phaeton.artisoft.com> In-Reply-To: <199603112027.MAA12773@GndRsh.aac.dev.com> from "Rodney W. Grimes" at Mar 11, 96 12:27:39 pm
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> > For the L2, the Saturn I chipset (mask date pre-April 1994) had a > > flaw, where the DMA notification from PCI was simply not internally > > connected to anything. This is most often seen in Gateway and Dell > > systems with 60MHz Pentiums, but they aren't the only ones who used > > Saturn I's, so they aren't the only machines with problems. > > Ahhh... Saturn I and II are 486 chipsets, so this must be Gateway and > Dell xxMhz 486 systems and not 60MHz Pentiums. You're right. But the Saturn chipset is not the only one that had the disconnected internal bus bridge (which was the problem: they left it off the artwork for some reason and blew a huge number of PCI bridge chip runs -- not just the SAturn, but Mercury and Neptune as well). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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