Restoring Ms-Dos System Files; If .Sys Files Are Missing - Texas Instruments TravelMate 4000M User Reference Manual

Restoring MS-DOS System Files

Restoring M S-DOS System Files
You cannot restore system files without having first created
the backup diskettes. If your system is down, you cannot
create these diskettes. It is very important to create
backup system diskettes as soon as possible after the
purchase of your computer. Refer to Chapter 1, Creating
Back Up System Diskettes.
The files , , , and
MS-DOS COMMAND.COM IO.SYS EXTMSDOS.SYS
are necessary for the operation of your
MSDOS.SYS
computer. If any of these files is accidentally deleted or
modified, your computer will not function as designed. This
section describes the procedure for restoring these files
without affecting the applications and data files that may
be on your hard drive.
If you need more information, see the MS-DOS User's Guide
and Reference.
Note: , , and are hidden
IO.SYS EXTMSDOS.SYS MSDOS.SYS
files. You will not see these files if you view a directory of
drive C using the command.
DIR
If is Missing
COMMAND.COM
If is missing from your hard disk, the screen
COMMAND.COM
displays this message during the boot process:
Bad or missing Command Interpreter
The computer then becomes inactive. Complete the steps in
the next section to restore to your hard
COMMAND.COM
disk.

If .SYS Files are Missing

If the , , and/or the files
IO.SYS EXTMSDOS.SYS MSDOS.SYS
are missing from your hard disk, the screen displays the
following message during the boot process:
2-16 Installing and Using Applications