Texas Instruments 4000M - Manual (Page 49)

Non-System disk or disk error
Replace and press any key when ready
This message is repeated when any key is pressed.
Complete the following steps to restore the .SYS files to your
hard disk:
1. Turn off the computer, and insert the 3.5-inch Microsoft
MS-DOS, Disk 1 floppy into the floppy drive.
2. Turn on the computer and when the computer displays
the "Welcome to Setup" menu, press ENTER, and
follow the directions.
You will be asked to verify date/time, country and
keyboard layout, and the directory to which you will be
installing DOS.
3. Press ENTER.
DOS begins installing and prompts you for all three
diskettes. A supplemental DOS diskette is provided.
This diskette includes optional utilities such as
AccessDOS, keyboard utilities, and MS-DOS 6.2
utilities.
4. To install the supplemental DOS diskette, insert it into
do drive A and type
A:SETUP
During installation of the fourth diskette, the system will
prompt you for a directory in which to place system
files.
5. Type:
C:\DOS
Restoring MS-DOS System Files
Installing and Using Applications 2-17