From owner-freebsd-stable Fri Aug 21 11:42:11 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id LAA14274 for freebsd-stable-outgoing; Fri, 21 Aug 1998 11:42:11 -0700 (PDT) (envelope-from owner-freebsd-stable@FreeBSD.ORG) Received: from yip.org (yip.org [142.154.6.140]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA14231; Fri, 21 Aug 1998 11:41:59 -0700 (PDT) (envelope-from melange@yip.org) Received: from localhost (melange@localhost) by yip.org (8.8.8/8.8.8) with SMTP id OAA25407; Fri, 21 Aug 1998 14:41:33 -0400 (EDT) (envelope-from melange@yip.org) Date: Fri, 21 Aug 1998 14:41:31 -0400 (EDT) From: Bob K To: Jeff Kletsky cc: freebsd-stable@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG, support@tomshardware.com Subject: Re: FYI: page faults caused by "speculative read" In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, 21 Aug 1998, Jeff Kletsky wrote: > While I have not had this problem with several other Pentium systems, in > building 2.2.7-RELEASE from CD-ROM I recently encountered a system that > would not run sysinstall without page faults. This was apparently caused > by enabling "Speculative Read" in the BIOS. > > Abit AB-TX5 (Intel 430TX) > AMD K6-233 at "normal" voltages and clock > 64 MB SDRAM (10 ns) > > I do not know the hardware cause of this problem; the vendor I use has been > very reliable and supplies better-than-average components. I have enabled > speculative read on other AB-TX5-based systems (albeit all Intel Pentiums) > without incident, and find the M/B to be very reliable, even at 83 MHz bus > speeds. > > In the hopes someone else may be spared gray hairs, I think in the manual for my AOpen AP5T rev.3.1 (tx chipset), it mentions that one can't use speculative read with two DIMMs - only if you have one. I can't remember if the option is even available in the BIOS if you do have two, though. Might that have had something to do with why it was causing that? melange@yip.org - "Slightly tacky but completely entertaining" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message