K1-7
3.4 Backup the System Files (PC-DOS: Ver. 6.3)
If A-drive (Flash ROMs) has been formatted or the system files have been destructed in an
operational error, and PC-DOS, therefore, does not start, start the PC-DOS with the floppy
disk that contains the system files. The necessary system files are as follows:
IBMDOS.COM IBMBIO.COM
COMMAND.COM FORMAT.COM (a file to be added)
Note) "IBMDOS.COM" and "IBMBIO.COM" are hidden files which you cannot find
by using "DIR" command.
The following procedure shows how to copy the system files and "FORMAT.COM" file
from normally operating IB-581 to FD.
Procedure
1. Quit the terminal program. For example, with NBDP terminal,
- press [F2] key while pressing [Fn] and [Alt] keys.
For how to quit each the terminal program, refer to "page K1-1".
2. Change to the root directory of A-drive.
The prompt “A:¥>” will appear on the screen. If this prompt does not appear,
- press keys, [C], [D], [Space], [¥], and [Enter], successively.
Or,
- press [C], [D], [.], [.] keys until the display "A:¥>" appears.
3. Insert the FD to write the system files into the FD drive.
4. To format the FD and copy the system files at the same time,
- successively press keys [F], [O], [R], [M], [A], [T], [Space], [B], [:], [Space], [/],
[S], and [Enter].
5. Press keys according to the displayed operational instructions.
“Insert new diskette for drive B: and press ENTER when ready..”
- Press [Enter] key.
“Checking existing disk format. Saving ---- Volume
label (11characters,ENTER for none)?”
- Press [Enter] key.
“Volume Serial Number is 3C53-16D5 Format another(Y/N)?”
- Press [N] and [Enter] keys successively.
6. After a prompt “A:¥>” appears on the screen, change to B-drive by pressing keys,
- [B],[:], and [Enter], successively.
And check the contents of the FD.
- Press [D], [I], [R], and [Enter] keys successively.
The "COMMAND.COM" file must be shown.
IB-581
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