From owner-freebsd-scsi Tue May 27 10:53:08 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id KAA24978 for freebsd-scsi-outgoing; Tue, 27 May 1997 10:53:08 -0700 (PDT) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (8.8.5/8.8.5) with SMTP id KAA24954 for ; Tue, 27 May 1997 10:52:52 -0700 (PDT) Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id TAA01659; Tue, 27 May 1997 19:52:20 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.8.5/8.8.5) id TAA02255; Tue, 27 May 1997 19:28:59 +0200 (MET DST) Message-ID: <19970527192859.WW56689@uriah.heep.sax.de> Date: Tue, 27 May 1997 19:28:59 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-scsi@freebsd.org, current-users@netbsd.org Subject: Re: ncr driver working well with 53c875? References: <19970527080727.YB12431@uriah.heep.sax.de> <19970527131308.62693@x14.mi.uni-koeln.de> X-Mailer: Mutt 0.60_p2-3,5,8-9 Mime-Version: 1.0 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <19970527131308.62693@x14.mi.uni-koeln.de>; from Stefan Esser on May 27, 1997 13:13:08 +0200 Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As Stefan Esser wrote: > > Stefan, do you have a connection to Tekram? > > No, not really. I know the mail address of some developer > there, and had planned to send him the fixes I applied to > the AMD SCSI driver (the low-end Tekram cards use the AMD > chip, but share most of the driver code). Well, please bug him about the BIOS bug. ;-) > Maybe the controller is less worried when it does not see > any MBR, than when it finds one with values it does not > like ... :) No such thing like ``no MBR''. The MBR is by definition the very first 512-byte record of a bootable drive. It needs to have a 0x55aa signature at the end in order to be recognized by the BIOS. Some BIOSes apparently try to be `smarter', and wanna imply more semantics than this signature. (Normally, the BIOS should just load an MBR that has this signature onto address 0x7c0:0, and execute it.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)