Commodore RF512C - Page 20

15
COpy IBACKUP
Fun ction These in terpreter commands copy file(s) or the whole
disk to
ano ther fi le or disk in the same unit so they
can be considered as files combination
commands.
C
is the mnemonic of copy direct command .
Fo rmat
BA SIC
BASI C 7.0
Syntax
st r ing$= " cr OPY ] : copy file = sourcefile 1
[, source fil e 2]. ..
C OPY
"sourcefile"[,D drive" ] TO "copyfile"
[D drive" ,U device"]
BACKUP D sourcedrive" TO D copydrive"
[,U dev i ce " ]
Remember, there has no si
ng le instruction in BASI C 2 .0
that's equilvent to COpy or BA C KUP, sa the fi r st
f orma t can only works in mul ti - command form.
The
copy file and sourcefile mus t be str ings (i.e.
sourcefile should be some name of disk fi le).
If no fi l ename is assigned to COPY command, then
C
OPY all files action will take.
The device " default value is 8.
The drive" default value is O.
Where the preceding letter D and U please refer to
S YNTA X.
E
xampl e: 10 C LOSE 1
20
OPEN 1 ,8 ,15, "c : DE ST= DEMO ,C HE C KER "
30 C
LO SE 1
(You can check t he directory to con firm the size of
DE ST that is equa l to the length of DEM O plus
CHECKER 's l eng th.)
In single drive sys tem, BA C KUP di sk is nonsence.