From owner-freebsd-questions Sun Oct 29 9:52:40 2000 Delivered-To: freebsd-questions@freebsd.org Received: from heorot.1nova.com (sub24-23.member.dsl-only.net [63.105.24.23]) by hub.freebsd.org (Postfix) with ESMTP id 4D56237B479 for ; Sun, 29 Oct 2000 09:52:39 -0800 (PST) Received: by heorot.1nova.com (Postfix, from userid 1000) id CF14A3264; Sat, 28 Oct 2000 10:16:05 +0000 (GMT) Received: from localhost (localhost [127.0.0.1]) by heorot.1nova.com (Postfix) with ESMTP id B4036325B; Sat, 28 Oct 2000 10:16:05 +0000 (GMT) Date: Sat, 28 Oct 2000 10:16:05 +0000 (GMT) From: Rick Hamell To: Phil Allsopp Cc: e96sv@efd.lth.se, freebsd-questions@FreeBSD.ORG Subject: Re: Page fault In-Reply-To: <3.0.3.32.20001029113813.01b8acf8@mail.btinternet.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > >Hi. I'm trying to put more memory into my 486 DX2 computer. > >It's got 16MB at the moment (2 8MB 72 pin simms), but when I add one more > 8MB simm, the BIOS sees it, but the kernel panics at boot with a "page > fault" error. > >I really don't know where I should begin searching for the error here. Any > ideas? > > > You have to put simms in in pairs. > > This is due to the fact that the CPU can access the RAM faster than the ram > can respond and so the ram is accesses in an odd/even manner. One simm > first then the other and so on. But 486's don't (usually) have to worry about this. Most likely the new chip is causing problems. I'd swap it down to the first or second slot to see if it causes problems there. Rick ******************************************************************* Rick's FreeBSD Web page http://heorot.1nova.com/freebsd Ace Logan's Hardware Guide http://www.shatteredcrystal.net/hardware ***FreeBSD - The Power to Serve! http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message