mbrbm.lis

PC BIOS Boot Manager _within_ the Master Boot Record (MBR) Displays list of partitions and let user

     1                                  ; $Id: mbrbm.S,v 1.2 2007/05/20 09:44:00 freakout42 Exp $
     2                                  
     3                                  ; mbrbm - Master Boot Record Boot Manager
     4                                  ;
     5                                  ;    Copyright (C) 2007 Axel Reinhold
     6                                  ;    http://mbrbm.sourceforge.net/
     7                                  ;
     8                                  ;    This program is free software; you can redistribute it and/or modify
     9                                  ;    it under the terms of the GNU General Public License as published by
    10                                  ;    the Free Software Foundation; either version 2 of the License, or
    11                                  ;    (at your option) any later version.
    12                                  ;
    13                                  ;    This program is distributed in the hope that it will be useful,
    14                                  ;    but WITHOUT ANY WARRANTY; without even the implied warranty of
    15                                  ;    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    16                                  ;    GNU General Public License for more details.
    17                                  ;
    18                                  ;    You should have received a copy of the GNU General Public License
    19                                  ;    along with this program; if not, write to the Free Software
    20                                  ;    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    21                                  ;
    22                                  ; PC BIOS Boot Manager _within_ the Master Boot Record.
    23                                  ; MBR Bootcode written in nasm (x86 assembler).
    24                                  ; Displays partition list with type/size and let user choose booting partition.
    25                                  ; Boots active partition at timeout.
    26                                  ; Restrictions: no LBA support, no extended partitions support.
    27                                  ; Compatible with DOS, Windows, Lilo, Grub, BSD, ... partition boot records.
    28                                  ;
    29                                  ; FULL BACKUP IS HIGHLY RECOMMENDED
    30                                  ; USE ONLY IF YOU REALLY KNOW WHAT YOU'RE DOING HERE
    31                                  ; YOU NEED A WORKING PARTITION BOOT SECTOR
    32                                  ;
    33                                  ; Compilation of the mbr:
    34                                  ; nasm mbrbm.S -o mbrbm.bin
    35                                  ;
    36                                  ; Installation with Linux on first IDE Harddisk (cut/paste script into a sh-script):
    37                                  %IFDEF INSTALLSH
    38                                  #!/bin/sh
    39                                  if [ -f /etc/hda.mbr ]; then
    40                                   echo mbrbm installation failed
    41                                   exit 1
    42                                  fi
    43                                  if [ ! -f mbrbm.bin ]; then
    44                                   echo mbrbm installation failed
    45                                   exit 1
    46                                  fi
    47                                  cp mbrbm.bin /etc
    48                                  set -ex
    49                                  cd /etc
    50                                  rm -f hda.mbr
    51                                  dd if=/dev/hda of=hda.mbr bs=1b count=1
    52                                  if [ ! -f /etc/hda.mbr ]; then
    53                                   echo mbrbm installation failed
    54                                   exit 1
    55                                  fi
    56                                  dd if=mbrbm.bin of=hdambrbm.mbr bs=1 count=438
    57                                  dd if=hda.mbr bs=1 skip=438 count=74 >>hdambrbm.mbr
    58                                  MBRSIZE=`ls -l hdambrbm.mbr | awk '{print $5}'`
    59                                  if [ ! "$MBRSIZE" -eq 512 ]; then
    60                                   echo mbrbm installation failed
    61                                   exit 1
    62                                  fi
    63                                  dd if=hdambrbm.mbr of=/dev/hda bs=1b count=1
    64                                  # KEEP THE FILE /etc/hda.mbr AS BACKUP OF ORIGINAL MBR
    65                                  exit
    66                                  %ENDIF
    67                                  ;
    68                                  ; Deinstallation with Linux on first IDE Harddisk:
    69                                  ; dd if=/etc/hda.mbr of=/dev/hda bs=1b count=1
    70                                  ;
    71                                  ; Installation with FreeDOS on first Harddisk (cut/paste script into a bat-script):
    72                                  %IFDEF INSTALLBAT
    73                                  @ECHO ON
    74                                  IF EXIST C:\hda.mbr GOTO FAIL
    75                                  IF NOT EXIST mbrbm.bin GOTO FAIL
    76                                  COPY mbrbm.bin C:C:
    77                                  CD DEL BOOT.MBR
    78                                  FDISK /SMBR 1
    79                                  IF NOT EXIST BOOT.MBR GOTO FAIL
    80                                  COPY BOOT.MBR hda.mbr
    81                                  IF NOT EXIST C:\hda.mbr GOTO FAIL
    82                                  COPY mbrbm.bin BOOT.MBR
    83                                  FDISK /AMBR 1
    84                                  ECHO KEEP THE FILE C:\hda.mbr AS BACKUP OF ORIGINAL MBR
    85                                  GOTO EXIT
    86                                  :FAIL
    87                                  ECHO mbrbm installation failed
    88                                  :EXIT
    89                                  %ENDIF
    90                                  ;
    91                                  ; Deinstallation with FreeDOS on first Harddisk:
    92                                  ; C:
    93                                  ; CD ; COPY hda.mbr BOOT.MBR
    94                                  ; FDISK /AMBR 1
    95                                  
    96                                  %IFDEF GPLICENSE
    97                                  		    GNU GENERAL PUBLIC LICENSE
    98                                  		       Version 2, June 1991
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