From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 15 Aug 1995 17:13:10 -0400 From: jmk@plan9.att.com jmk@plan9.att.com Subject: floppy boot on Pentium Topicbox-Message-UUID: 1698abe8-eac8-11e9-9e20-41e7f4b1d025 Message-ID: <19950815211310.F2dd4VICkpmkxlfbTo2zTByWId-GzwhjlWqtsY5cs1w@z> I've applied the dma overrun fix to b.com, the boostrap programme. A new image of disk1 is available via ftp, disk1.3. When we were testing the distribution there was one system that consistently gave truly appalling floppy performance and we could never pin down why, it was an NCR Globalyst 600 with a P90. We have other 90MHz systems that give no trouble. ------ original message follows ------ >>From cse.psu.edu!9fans-outgoing-owner Tue Aug 15 13:44:02 EDT 1995 Received: by psuvax1.cse.psu.edu id <34161>; Tue, 15 Aug 1995 13:19:22 -0400 Received: from postman.ncube.com ([134.242.8.47]) by psuvax1.cse.psu.edu with SMTP id <34162>; Tue, 15 Aug 1995 12:17:57 -0400 Received: from garcon.ncube.com by postman.ncube.com (4.1/SMI-4.1) id AA00596; Tue, 15 Aug 95 08:09:21 PDT Received: from pejs.ncube.com by garcon.ncube.com (5.x/SMI-SVR4) id AA12807; Tue, 15 Aug 1995 08:09:20 -0700 Date: Tue, 15 Aug 1995 11:09:20 -0400 From: sch@postman.ncube.com (Steve Hemminger) Message-Id: <9508151509.AA12807@garcon.ncube.com> Received: by pejs.ncube.com (4.1/SMI-4.1) id AA05858; Tue, 15 Aug 95 08:10:00 PDT To: 9fans@cse.psu.edu Subject: floppy boot on Pentium Sender: owner-9fans@cse.psu.edu Precedence: bulk Reply-To: 9fans@cse.psu.edu Booting directly from floppy (like the 1st disk of the 4 disk set) does not work on our Pentium PC's when they are running at full speed. It gets part way through the load and fails with "premature EOF" (fails at different point every time). It does work if: - turn off cache (in BIOS) - or set clock rate to 25Mhz - or boot DOS then run b Looks like the boot block program is not setting up something related to the floppy controller (or has a silly spin loop). -sch