From owner-freebsd-current Mon Mar 11 12:40:20 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id MAA13293 for current-outgoing; Mon, 11 Mar 1996 12:40:20 -0800 (PST) Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id MAA13285 for ; Mon, 11 Mar 1996 12:40:18 -0800 (PST) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id NAA03822; Mon, 11 Mar 1996 13:36:00 -0700 From: Terry Lambert Message-Id: <199603112036.NAA03822@phaeton.artisoft.com> Subject: Re: AMD doesn't like SNAP! (panic: unwire: page not in pmap) To: rgrimes@GndRsh.aac.dev.com (Rodney W. Grimes) Date: Mon, 11 Mar 1996 13:36:00 -0700 (MST) Cc: terry@lambert.org, imb@scgt.oz.au, current@freebsd.org In-Reply-To: <199603112027.MAA12773@GndRsh.aac.dev.com> from "Rodney W. Grimes" at Mar 11, 96 12:27:39 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > > 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.