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Xref: sserve comp.os.os2.programmer.misc:9902 comp.os.linux.development:9168 comp.os.minix:23758 comp.os.mach:3828 comp.periphs:5516 comp.unix.bsd:13973 comp.unix.pc-clone.32bit:6304 comp.os.386bsd.development:2128 comp.sys.ibm.pc.hardware.misc:5401 Newsgroups: comp.os.os2.programmer.misc,comp.os.linux.development,comp.os.minix,comp.os.mach,comp.periphs,comp.unix.bsd,comp.unix.pc-clone.32bit,comp.os.386bsd.development,comp.sys.ibm.pc.hardware.misc Path: sserve!newshost.anu.edu.au!munnari.oz.au!uunet!news2.sprintlink.net!news.sprintlink.net!hookup!news.moneng.mei.com!howland.reston.ans.net!math.ohio-state.edu!news.acns.nwu.edu!news.eecs.nwu.edu!ahab.eecs.nwu.edu!hpa From: hpa@ahab.eecs.nwu.edu (H. Peter Anvin) Subject: Re: [Announcement] 386BSD Release 1.0 Message-ID: <Cpx9vK.48v@eecs.nwu.edu> Sender: usenet@eecs.nwu.edu X-Pgp-Key-Available: finger hpa@ahab.eecs.nwu.edu Reply-To: hpa@nwu.edu (H. Peter Anvin) Organization: Northwestern University Electromagnetics Laboratory References: <2q63q2$927@dearg.cuillin.org.uk> <newcombe.142.00141E4A@aa.csc.peachnet.edu> <2qdvvp$r@bmerha64.bnr.ca> <oyang.769000946@bruce.cs.monash.edu.au> Date: Tue, 17 May 1994 01:09:19 GMT Lines: 25 Followup to: <oyang.769000946@bruce.cs.monash.edu.au> By author: oyang@cs.monash.edu.au (Kai Shing O'Yang) In newsgroup: comp.os.linux.development > > How about a scsi CDROM drive set at id=0? the SCSI Adaptor bios will > treat the device as a hard drive and tries to read the boot sector from it. > if there is a way to fool the bios that the CD is actually a H/D, I can't see > why one can't boot from CD. If I'm wrong, pls correct me. You are wrong. SCSI devices announce the type of device; and the BIOS will ignore devices not labelled as a hard drive (read/write mass storage, nonremovable) or possibly a floppy (read/write mass storage, removable). There is no *technical* reason why it can't be done, the problem is that with the standard PC hardware and BIOS there is no way of transferring control to the CD without the aid of a program stored elsewhere. This program can be on hard disk, floppy, or in a ROM. /hpa -- INTERNET: hpa@nwu.edu FINGER/TALK: hpa@ahab.eecs.nwu.edu IBM MAIL: I0050052 at IBMMAIL HAM RADIO: N9ITP or SM4TKN FIDONET: 1:115/511 or 1:115/512 STORMNET: 181:294/101 To the memory of Richard Nixon we will now dedicate 18 1/2 minutes of silence.