Commodore Plus 4 - Page 40

38 The BASIC Language
Also unlike the BACKUP command, COPY does not duplicate disk errors in a
file. If a file you are COPYing contains a disk error, the file is not copied. The
advantage of this difference is that you do not duplicate inaccessible files.
Parameter Values Default
drive number, 0 or 1 0
"master file" any file name in quotes
TO drive number, 0 or 1 0
"receiving file", any file name in quotes
U unit number 8-11 8
1. Both drive numbers can be omitted if you are making a duplicate of a file on
the same disk.
2. The Master File is the name of the file you want to copy. The name must be
in quotes.
3. TO is a necessary part of the COPY command. The drive number can be
omitted, but TO cannot.
4. The Receiving File is the name of the file that will become the copy of the
master file. The receiving file name can be the same as the master file, which is
likely when you are copying from one drive to another. The name must be in
quotes. The receiving file name must be different if you are copying afile onto the
same disk.
5. Unit number is an optional parameter. Use it only if you have more than
one disk drive connected to your computer and you are using a device other
than unit 8 in the COPY procedure. You must precede the unit number with U,
and the unit number must be between 8 and 11. You can type ON before the unit
number, but ON is not required. Most people will never need the unit number
option.
Note: The drive and unit number parameters and the file names can be
specified with a variable or expression in parentheses.
Examples: COPY DO, "ADDR" TO Dl, "ADDR" Copies the file ADDR from the
disk in drive 0 to the disk in drive 1.
COPY DO TO Dl Copies all the files on the disk in
drive 0 to the disk in drive 1.
COPY "MEM01" TO "MEM02" Copies the file MEMO1 onto the
same disk, renaming the file
MEMO2. This does not affect
MEM01.