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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.rmit.EDU.AU!news.unimelb.EDU.AU!munnari.OZ.AU!news.mel.connect.com.au!news.mira.net.au!vic.news.telstra.net!act.news.telstra.net!imci3!newsfeed.internetmci.com!news1.erols.com!newsmaster@erols.com From: Ken Bigelow <kbigelow@www.play-hookey.com> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Split Bus problem Date: Tue, 11 Jun 1996 21:52:11 -0700 Organization: Erols Internet Services Lines: 22 Message-ID: <31BE4CFB.7D8A@www.play-hookey.com> References: <Pine.BSF.3.91.960611142522.3238A-100000@walter.acs.nmu.edu> NNTP-Posting-Host: kenjb05.play-hookey.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 2.02 (Win16; I) John Marra wrote: > > I am running FreeBSD 2.1.0 - Release on a 486DX4-100 with 20MB of > memory. The machine was running great until I put both SCSI hard drives > on an Adaptec PCI card. Up until that time, all the expansion cards > were ISA. After this, the machine routinely crashes without a hint of > the problem. The network card is an ISA ne2000 clone. Has anyone > experienced this problem recently??? Thanks. My first guess would be timing om the ISA bus. With a DX4-100, the motherboard is running at 33 MHz. If your ISA clock is CLK/4, it's running at 8.33 MHz, which exceeds the 8.00 MHz specification. I've had several generic NE2000 cards get lost running heavy communications on this basis. Depending on how your ROM BIOS Setup menu works, either slow the ISA clock down (CLK/5, 7.19 MHz, or available alternate), or else add a wait state on the ISA bus. I actually encountered this problem first when setting up a DOOM2 deathmatch over an IPX/SPX network, but the problem was the same and this was the solution. Ken