Groups > comp.os.msdos.programmer > #198

Re: Floppy based FreeDOS

From	Ross Ridge <rridge@csclub.uwaterloo.ca>
Newsgroups	comp.os.msdos.programmer
Subject	Re: Floppy based FreeDOS
Date	2011-09-04 10:00 -0400
Organization	University of Waterloo
Message-ID	<j4009a$106$1@rumours.uwaterloo.ca> (permalink)
References	<853384dd-5b93-46d5-9a05-a95fe856e045@r8g2000prd.googlegroups.com> <970663ed-2ab2-47f5-89f9-be0d95cd12c8@b10g2000vbz.googlegroups.com> <600db7ae-4aa0-4b30-95b0-0684fd0ccb29@e34g2000prn.googlegroups.com> <0rnbj8-tdc.ln1@nntp.local.net>

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Single Stage to Orbit  <alex.buell@munted.org.uk> wrote:
>IIRC, IBM BIOS doesn't do hard disks. Rather, on the IBM PC, the BIOS
>calls into the ROM that was provided with the hard disk interface.

The original IBM PC BIOS didn't support hard drives, but the IBM PC XT
and later, including current BIOSes, do.  Hard drive interface adapters,
then and now, can include their own BIOS extention ROM for when the BIOS
doesn't support the particular interface, but in that case the extention
ROM hooks the existing BIOS INT 13h interface provided by the BIOS.
The BIOS doesn't call out to the ROM, except once during start up to
initialize it.

					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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Thread

Floppy based FreeDOS monahanz <monahan@vitasoft.org> - 2011-09-03 10:41 -0700
  Re: Floppy based FreeDOS Rugxulo <rugxulo@gmail.com> - 2011-09-03 11:55 -0700
    Re: Floppy based FreeDOS monahanz <monahan@vitasoft.org> - 2011-09-03 22:43 -0700
      Re: Floppy based FreeDOS Single Stage to Orbit <alex.buell@munted.org.uk> - 2011-09-04 09:01 +0100
        Re: Floppy based FreeDOS Ross Ridge <rridge@csclub.uwaterloo.ca> - 2011-09-04 10:00 -0400
      Re: Floppy based FreeDOS Rugxulo <rugxulo@gmail.com> - 2011-09-04 08:53 -0700
        Re: Floppy based FreeDOS monahanz <monahan@vitasoft.org> - 2011-09-04 10:06 -0700
          Re: Floppy based FreeDOS monahanz <monahan@vitasoft.org> - 2011-09-04 12:44 -0700
          Re: Floppy based FreeDOS Rugxulo <rugxulo@gmail.com> - 2011-09-04 13:08 -0700
            Re: Floppy based FreeDOS monahanz <monahan@vitasoft.org> - 2011-09-04 14:53 -0700
              Re: Floppy based FreeDOS Jim Leonard <mobygamer@gmail.com> - 2011-09-06 09:54 -0700
                Re: Floppy based FreeDOS Jim Leonard <mobygamer@gmail.com> - 2011-09-07 12:08 -0700
            Re: Floppy based FreeDOS "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-09-05 02:10 -0400

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