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- Path: sparky!uunet!mcsun!Germany.EU.net!unidui!du9ds3!veit
- From: veit@du9ds3.fb9dv.uni-duisburg.de (Holger Veit)
- Newsgroups: comp.unix.bsd
- Subject: Re: dist.fs boot infinity-loop
- Date: 19 Nov 92 18:50:51 GMT
- Organization: Uni-Duisburg FB9 Datenverarbeitung
- Lines: 44
- Message-ID: <veit.722199051@du9ds3>
- References: <BxxHtz.2sz@encore.com>
- Reply-To: veit@du9ds3.uni-duisburg.de
- NNTP-Posting-Host: du9ds3.fb9dv.uni-duisburg.de
- Keywords: boot loop
-
- In <BxxHtz.2sz@encore.com> idequesa@encore.com (Ivan Dequesada) writes:
-
-
- >Does anyone know the difference between BSD's dist.fs and
- >LINUX's dist.fs??
-
- The main difference is, that 386bsd is running fully in protected mode
- from the moment the boot sector of the disk or floppy has been read in.
- That means, that there is no help from any BIOS or ROM to do any
- initialization that is not done by the power-on-self-test or the ROM
- bootstrap loader.
- LINUX, instead follows the old tradition of Minix, and switches to
- protected mode very late, when the whole kernel image has been loaded. This
- allows for instance the switch to high resolution video modes (this is
- available by the SVGA BIOS), which must be done by real register programming
- in 386bsd. Once some code for this has been written for 386bsd, it can be used
- universally, without any messing around with a VM86 syscall.
-
- >It seems that some PCs (Including (but not limited to) Compaq
- >Systems and TI's) hang in an infinite loop when booting from
- >the dist.fs diskette (3 1/2", 1.44 Mbytes).
- >This seems to be a compatability problem. However, it would be
- >better to fix it in the diskette than in the BIOS-ROMs of
- >tens of thousands of PCs. The fact that those PCs can boot the
- >dist.fs with LINUX on it, indicates that the problem can be fix
- >in the dist.fs.
-
- The above is the main reason for the "fewer" problems with Linux boot,
- once you are in protected mode, Linux is no better than 386bsd.
-
- >Mr. Jolitz, if you read this, ask Linus if he uses near or far
- >pointers when booting.
-
- Although I am not Bill, I think that this makes no difference.
-
- > idequesa@encore.com
-
- Holger
-
- --
- | | / Dr. Holger Veit | INTERNET: veit@du9ds3.fb9dv.uni-duisburg.de
- |__| / University of Duisburg | "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
- | | / Dept. of Electr. Eng. | Sorry, the above really good fortune has
- | |/ Inst. f. Dataprocessing | been CENSORED because of obscenity"
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