From owner-cvs-all  Tue Jun 27 13: 4:15 2000
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From: John Baldwin <jhb@FreeBSD.org>
Date: Tue, 27 Jun 2000 13:04:11 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/boot/i386/mbr mbr.s
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jhb         2000/06/27 13:04:11 PDT

  Modified files:
    sys/boot/i386/mbr    mbr.s 
  Log:
  - Don't blindly assume that there are 8 hard drives installed.  Instead,
    use the BIOS Equipment List to determine how many hard drives are
    installed and if the drive number we received in %dl is valid.
  - Don't bother to disable interrupts when setting up the stack.  The 8086
    and beyond implicitly disable interrupts after an instruction that sets
    %ss (for example, a pop or a mov) so that you can safely set %ss and %sp
    in two consecutive instructions.  An exception to this is the lss
    instruction, which can set both registers simultaneously and thus doesn't
    need this hack.
  - Add support for EDD BIOS extensions to support booting off of hard drives
    of nearly arbitrary length.
  
  Revision  Changes    Path
  1.6       +38 -11    src/sys/boot/i386/mbr/mbr.s



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