Texas Instruments 3000 - Manual (Page 155)

Restoring MS-DOS System Files
3. When the A> prompt is displayed, remove the SHELL floppy and insert
the Select Copy floppy, and type
SYS C:
and press the Enter key. The computer should display the message
System transferred
and then display the A> prompt.
4. At the A> prompt type
COPY COMMAND.COM C:\DOS
and press the Enter key. The computer should display the message
1 File(s) copied
and then display the A> prompt.
Note: If the computer displays an error message such as "Sector not found error reading
(or writing) drive X," you may have a problem with the hard disk chive or the floppy
drive.
5. Remove the Select Copy floppy from the floppy drive.
6 . Press the Ctrl-Alt-Del keys. The computer should restart (reboot)
normally.
Troubleshooting E- 11