Date: Fri, 14 Jul 1995 18:48:22 -0500 (CDT) From: John Lind <john@starfire.mn.org> To: hackers@FreeBSD.org (FreeBSD hackers) Subject: HEYELP! (486DL fails to boot 2.0.5R-CD floppy image) Message-ID: <199507142348.SAA00186@starfire.mn.org>
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Just got my CDs for 2.0.5R, and made all my backups and prepared to upgrade. I made the boot floppy (since I don't have any DOS at all on this machine) to do the install. This floppy works fine on a 25Mhz 386 machine w/4Mb of RAM, but on my 33Mhz 486DL w/16Mb of RAM, it is a reboot loop! Whether or not I specify -c, it reads in the image from the floppy, uncompresses the kernel (... Done), says it is Booting the kernel, then BAM! Instant reboot. As nearly as my eyes can tell, there is no Copyright notice or anything before the screen clears and it does the Reset code stuff. This system is a 486DL -- the Cyrix 486SX in a 386 pin configuration -- with a real Intel 387. This system has been running FreeBSD 1.1 very nicely since it came out, and is the system from which I am writing this message (back under FreeBSD 1.1, obviously). I tried booting both with and without the CMOS cache config enabled, no difference. Even though this is a 486DL, I have never gone to the trouble to try to execute the magic instruction that turns on some special cache mode. If the 2.0.5R kernel does, could that be the problem? This motherboard was built to be 486DL compatible -- apparently there are some additional status lines that the DL can use or does produce or something, but I have never run it that way, to my knowledge. There is no Shadow RAM or any magic like that enabled. This same boot floppy works great on my 25Mhz 386. Help? Workaround? Very anxious to run 2.X -- this is a great thing, people, THANKS! Say, while I'm bothering you anyway, has anyone played with a 486DL before, and is that special instruction worth sticking in somehow somewhere if it isn't there already? John Lind, Starfire Consulting Services E-mail: john@starfire.MN.ORG USnail: PO Box 17247, Mpls MN 55417
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