Commodore 128 System Manual page 246

EXAMPLES:
AUTO 10
Automatically numbers program lines in increments
of 10.
AUTO 50
Automatically numbers lines in increments of 50.
AUTO
Turns off automatic line numbering.
BACKUP
Copy the entire contents from one disk to another
on a dual disk drive.
BACKUP source Ddrive number TO destination Ddrive number
[<ON | ,>Udevice]
This command copies all the data from the source diskette onto
the destination diskette using a dual disk drive. With the BACKUP
command, a new diskette can be used without first formatting it.
This is because the BACKUP command copies all the
information on the diskette, including the format. Because of this,
the BACKUP command destroys any information already on the
destination disk. Therefore, when backing up onto a previously
used diskette, make sure it contains no programs you mean to
keep. As a precaution the computer asks " ARE YOU SURE?''
before it starts the operation. Press the " Y" key to perform the
BACKUP, or any other key to stop it. You should always create a
backup of all your disks, in case the original diskette is lost or
damaged. Also see the COPY command. The default device
number is unit 8.
NOTE:
This command can be used only with a dual-disk drive. It
will not allow you to make copies of protected disks (most
prepackaged software).
EXAMPLES:
BACKUP DO to D1
Copies all data from the disk in drive 0 to the disk in drive 1, in
dual disk drive unit 8.
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