2004-12-19 20:33:29 +01:00
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<html>
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2005-05-28 14:10:29 +02:00
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<title>sys - FreeDOS system file installer</title>
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2004-12-19 20:33:29 +01:00
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<body>
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<h1>sys</h1>
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Copy system files and make a floppy disk or hard disk bootable.
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<pre>
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<b>sys [[d:]path] d: [bootsect] [switches]</b>
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</pre>
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<h2>Options</h2>
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<pre>
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<b>[[d:]path]</b>
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The (optional) location of the system files.
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If not given, the current directory is assumed.
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<b>d:</b>
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The drive to make bootable.
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<b>bootsect</b>
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The name of file, to which the 512-byte boot sector image
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will be written.
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(the drive's real boot sector won't be
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written to unless BOTH is used.)
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Switches (FreeDOS specific):
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<b>/BOTH</b>
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The new boot sector will be written to the image file
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and to the actual drive boot sector.
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<b>/BOOTONLY</b>
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With this option the boot sector (or image) will be updated,
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but the kernel and <a href="command.htm">command.com</a> will
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not be copied to the destination.
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2005-05-28 14:10:29 +02:00
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<b>/UPDATE</b>
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This option is for updating (or changing) your kernel while
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leaving your shell alone. Updates the boot sector and copies
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the kernel file(s) to the destination. [Allows installing
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latest kernel and boot sector without making a copy of your
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current COMMAND.COM or other shell first.] Note: for FreeDOS
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kernel, an upgrade can also be performed by simply copying
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KERNEL.SYS over an existing bootable one (though making a
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backup of your current kernel is encouraged).
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2004-12-19 20:33:29 +01:00
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<b>/K <i>filename</i></b>
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Gives the <i>filename</i> of the kernel file to be copied. This option
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is only required when the kernel is not called "kernel.sys"
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Note: when combined with the /L option, allows one to use FreeDOS
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<i>sys</i> to create a system to boot custom kernels (ie custom OS)
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<b>/L <i>segment</i></b>
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The load <i>segent</i>, in hexadecimal, to use. The default is 0x60.
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<b>/B <i>btdrv</i></b>
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Sets the BIOS boot drive # (in hex) stored within the boot sector.
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<b>/FORCEDRV</b>
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Causes the boot sector to only use the <i>btdrv</i> indicated in
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boot sector. NOPs the code that normally uses BIOS provided
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drive # passed at boot time in the DL register.
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<b>/BACKUPBS <i>[path]filename</i></b>
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The original boot sector is written to <i>[path]filename</i> prior
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to overwriting with FreeDOS one. The filename may refer to any
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[image or bs] file, if exists only the 1st 512 bytes will be
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overwritten.
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2005-01-01 16:30:56 +01:00
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<b>/DUMPBS <i>[path]filename</i></b>
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The original boot sector is written to <i>[path]filename</i> and
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then exits. The filename may refer to any [image or bs] file,
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if exists only the 1st 512 bytes will be overwritten.
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Note: /backupbs is intented to provide a backup of existing
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boot sector in case one wishes to restore it later (see /restorbs),
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whereas /dumpbs is intended only as a convenient method to
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obtain current boot sector (such as for debugging purposes or
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alternate installation scenerios).
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2004-12-19 20:33:29 +01:00
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<b>/RESTORBS <i>[path]filename</i></b>
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Restores original boot sector (<i>[path]filename</i>) and exits.
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The boot sector specified is written with no modifications.
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The filename may refer to any [image or bs] file, only the 1st
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512 bytes are used.
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<b>/OEM:<i>DOS</i></b>
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Where <i>DOS</i> is one of
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<b>AUTO</b> - the default, attempts to determine automatically,
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checking for FreeDOS, DR-DOS, PC-DOS, then MS-DOS;
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<b>FD</b> - FreeDOS mode, setup destination drive to boot
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the FreeDOS kernel and copy FreeDOS system files
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(default to KERNEL.SYS and load segment of 0x60)
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<b>DR</b> - use DR DOS 7+ (including Udo Kuhnt's DR-DOS
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Enhanement Project) compatible settings
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(use IBMBIO.COM & IBMDOS.COM, and loadseg=0x70)
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<b>PC</b> - use PC-DOS (any) compatible settings, including
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alternate boot sector (supports FAT12/16 only)
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Must be explicitly choosen, AUTO selects DR mode.
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(use IBMBIO.COM & IBMDOS.COM, and loadseg=0x70)
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<b>MS</b> - use MS-DOS (pre 7) compatible settings, including
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alternate boot sector (supports FAT12/16 only)
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(use IO.SYS & MSDOS.SYS, and loadseg=0x70)
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<b>W9x</b> - use MS-DOS 7+, aka Windows 9x DOS compatible
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settings, Win ME unsupported ...
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Note: when attempting to boot older PC/MS DOS versions, even when
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using the alternate boot sector, one may need to ensure the
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system files are the 1st two filesystem entries and in consecutive
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sectors at the beginning of the drive; so for best results when
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creating a PC/MS DOS boot disk, format the drive first, do NOT
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create a label, and then run sys on it. You can then add a label.
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Newer releases, such as PC-DOS 7.x do not have these limitations.
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</pre>
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<hr>
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<address>
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<b>Copyright © 1998 Jim Hall</b><br>
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This file is derived from the FreeDOS Spec Command HOWTO.
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See the file <a href="H2Cpying.txt">H2Cpying.txt</a> for copying conditions.
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</address>
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</body>
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</html>
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