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Groups > comp.os.msdos.programmer > #907 > unrolled thread
| Started by | "Rod Pemberton" <do_not_have@notemailnotq.cpm> |
|---|---|
| First post | 2013-05-20 23:27 -0400 |
| Last post | 2013-05-23 18:38 -0400 |
| Articles | 3 — 3 participants |
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Use of BIOS calls by various OSes, bootloaders, etc., online references "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-05-20 23:27 -0400
Re: Use of BIOS calls by various OSes, bootloaders, etc., online references "wolfgang kern" <nowhere@never.at> - 2013-05-21 21:16 +0200
Re: Use of BIOS calls by various OSes, bootloaders, etc., online references Ross Ridge <rridge@csclub.uwaterloo.ca> - 2013-05-23 18:38 -0400
| From | "Rod Pemberton" <do_not_have@notemailnotq.cpm> |
|---|---|
| Date | 2013-05-20 23:27 -0400 |
| Subject | Use of BIOS calls by various OSes, bootloaders, etc., online references |
| Message-ID | <knepcr$bco$1@speranza.aioe.org> |
The general issue of whether BIOS calls are important or not to bootloaders and OS development came up recently on alt.os.development. Perhaps, it's best for each to make their own conclusions. But, you can't do that well without being fully informed about what uses the BIOS. So, I can help inform by providing some references that I've collected over the years. I'm adding comp.os.msdos.programmer etc in case there is someone out there that wants or needs this esoteric info. "x86 BIOS calls used by grub and Linux" by Colin King, Feb 10 2010 http://smackerelofopinion.blogspot.com/2010/02/x86-bios-calls-used-by-grub-and-linux.html "A Study of BIOS Interrupts as used by Microsoft Windows 2000" by Adam Sulmicki http://wayback.archive.org/web/20070721000716/http://www.missl.cs.umd.edu/winint/index1.html "A Study of BIOS Services as used by Microsoft Windows XP" by Adam Sulmicki http://wayback.archive.org/web/20070721000843/http://www.missl.cs.umd.edu/winint/index2.html "Legacy-Free Hardware and BIOS Requirements" by Microsoft, Dec 4, 2001 http://web.archive.org/web/20100328131544/http://www.microsoft.com/whdc/archive/Lf.mspx "Linux 2.4 BIOS usage reference" by Alan Cox, Jun 22, 2001 linux.kernel, Usenet MSG-ID E15DTfd-0003gI-00@the-village.bc.nu https://groups.google.com/d/msg/linux.kernel/jCR0tpxu9oY/GJQToAyycoQJ "FreeBSD BIOS Coupling on i386" by Bruce M. Simpson, Apr 8, 2006 mailing.freebsd.current, Usenet MSD-ID e183jh$drj$1@FreeBSD.csie.nctu.edu.tw https://groups.google.com/d/msg/mailing.freebsd.current/K1VOemzz080/6TuwxYYtDSQJ "BIOS types" by Hale Landis, Jan 25, 1995 comp.sys.ibm.pc.hardware.storage, Usenet MSG-ID 791004479snx@sugs.tware.com https://groups.google.com/d/msg/comp.sys.ibm.pc.hardware.storage/87Wd8Jk8RWs/Bke_kDO_rdsJ "Reverse-Engineering DOS 1.0 - Part 1: The Boot Sector" http://www.pagetable.com/?p=165 Rod Pemberton "My paranoia becomes reality."
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| From | "wolfgang kern" <nowhere@never.at> |
|---|---|
| Date | 2013-05-21 21:16 +0200 |
| Message-ID | <kngiak$7uo$2@newsreader2.utanet.at> |
| In reply to | #907 |
Rod Pemberton wrote: > The general issue of whether BIOS calls are important or not to > bootloaders and OS development came up recently on > alt.os.development. ... A bootloader should check on A20_on and INT13.41 for ext. HD-read. Mem-map info from E820 may help a bit but cant tell available PCI-RAM. Anything else (today) like default Vmode==03 and all addon-hw-features are disabled until the OS enables it are almost standard BIOS-default. So my vital (only used once in Boot-sequence) BIOS calls are: 13/41..42 ;check for ext HD-access 10/4F/00/01 ;VBIOS: detect VESA and check for supported modes. 15/e820 ;memmap even not really a complete info to be found here. 15/.. ;assumed that the BIOS set monitor speed accordingly. all other hw-checks are part of the hw-detection module within the later in PM running OS-core (bypass/ignore all BIOS). __ wolfgang
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| From | Ross Ridge <rridge@csclub.uwaterloo.ca> |
|---|---|
| Date | 2013-05-23 18:38 -0400 |
| Message-ID | <knm5p1$t74$1@rumours.uwaterloo.ca> |
| In reply to | #907 |
Rod Pemberton <do_not_have@notemailnotq.cpm> wrote: >The general issue of whether BIOS calls are important or not to >bootloaders and OS development came up recently on >alt.os.development. Perhaps, it's best for each to make their own >conclusions. But, you can't do that well without being fully >informed about what uses the BIOS. Does it matter? As near as I can tell, being able to boot MS-DOS still is a requirement for motherboard manufacturers, so modern BIOS implementation still seem support "everything" or least every call they've always supported. I assume that's the way it going to remain until PC firmware goes EFI-only and drops all traditional BIOS interfaces completely. Or are some BIOS implementations actually dropping calls they no longer consider necessary? Ross Ridge -- l/ // Ross Ridge -- The Great HTMU [oo][oo] rridge@csclub.uwaterloo.ca -()-/()/ http://www.csclub.uwaterloo.ca/~rridge/ db //
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