Chapter 8 Peripheral Devices
255
For
example, to save a program called
FILENAME
on
the Datassette,
you would type
SAVE
"FILENAME"
and
press RETURN.
If
you have pressed the PLAY
and
RECORD
keys on the
Datassette, the Datassette will start operating. After your program has been
saved, the Datassette will stop, the cursor will start flashing again, and the
computer will display READY on the screen.
To load the program from the Datassette, type
LOAD
"FILENAME"
If
the PLAY button has been depressed, the Datassette will operate and the
computer will display
SEARCHING
FOR
FI~ENAME
As
it passes the various programs
that
precede the one being looked for, it
will display their names.
FOUND
OTHERFI~E
FOUND
WRONOIFI~E
FOUND
NEXTFI~E
When the program requested
is
found, it will display
FOUND
FI~ENAME
~OADING
WRITING
DATA
FILES
Writing program files into a Datassette file
is
a simple task. Putting
data
into a Datassette file
is
almost as easy, but it does require a basic
understanding
of
how the information
is
put onto tape.
The most common method
of
storing data
is
by simply printing the data
one item at a time to the Datassette. This can·
be
done by entering the
following statements.
First, you will need to open a file.
10
OPEN
lJ1J2J"DATA
FILE"
This will open a Datassette file with the number I and the name DATA
FILE. When the file
is
closed, it will write
an
end-of-file marker onto the
tape, which indicates to the VIC
20
that no more records exist in the file.
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