99 lines
3.0 KiB
Plaintext
99 lines
3.0 KiB
Plaintext
/* BSDI README.booting_dos,v 2.2 1996/04/08 19:32:18 bostic Exp*/
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/* $FreeBSD$ */
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To install DOS on a pseudo hard disk under doscmd:
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1) Create a .doscmdrc with at least the following:
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assign A: /dev/fd0.1440 1440
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assign A: /dev/fd0.720 720
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assign hard boot_drive 80 2 2
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You may need to adjust the raw files for the A: drive to match
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your system. This example will cause the HD drive to be tried
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first and the DD drive second.
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Note that you should only use raw devices or files at this point,
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do not use a cooked device! (Well, it would probably be okay
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for a hard disk, but certainly not the floppy)
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boot_drive should be the file name of where you want your bootable
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image to be. The three numbers which follow "80 2 2" say that the
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drive will have 80 cylinders, 2 heads and 2 sectors per track.
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This is the smallest drive possible which still can have MS DOS
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5.0 installed on it along with a config.sys and autoexec.bat file.
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You might want to create a larger boot drive.
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The file boot_drive must exist, so use the command touch to create
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it.
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2) Insert a floppy disk into the A: drive which is bootable to MS-DOS
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and has the commands fdisk, format and sys on it. You should also
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copy the file redir.com onto the floppy by either mounting it
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with the msdos filesystem type or by using mtools.
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(i.e. mwrite redir.com a:)
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3) run doscmd.
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4) At the > prompt type "fdisk"
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5) Select "Create DOS partition or Logical Drive"
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6) Select "Create Primary DOS Partition"
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7) Tell it how big to make it (I say use the whole drive.
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It is pretty tiny after all.)
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8) Get out of FDISK by hitting <ESC> a few times.
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9) doscmd will now abort (will try and fix this in a future version)
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10) start up doscmd again, leaving the floppy in the drive.
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11) At the > prompt, type "format c:" and follow the instructions.
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12) At the > prompt type "sys c:"
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13) Get out of doscmd.
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14) Either remove the floppy from the drive or add the line
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boot C:
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to your .doscmdrc
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15) You should now be running DOS off of your new disk. You will
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probably want both config.sys and an autoexec.bat file. To
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start with, you can say:
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> copy con: config.sys
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LASTDRIVE=Z
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^Z
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> copy con: autoexec.bat
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@echo off
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redir.com
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^Z
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16) Quit doscmd.
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17) You now have a bootable pseudo disk which will automatically call
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the magic "redir" program, which installs FreeBSD disks. To use
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them add lines to your .doscmdrc such as:
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assign D: /usr/dos
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assign P: -ro /usr/prb
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Note that you will not always be able to access every file due to
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naming problems.
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18) To use the new EMS memory you need to copy the file emsdriv.sys
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to your DOS boot disk (disk image) in the same way you copied
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redir.com. The use it in your "config.sys" from DOS:
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device=C:\emsdriv.sys
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where C: is your boot drive (supply the correct letter, if needed)
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and emsdriv.sys is the driver. You could load it high. It should
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report "Doscmd EMS 4.0 driver installed".
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