BASIC FUNCTIONS
SECTION 5.16
OPEN
5.16. 12 Function OPEN opens file for I/O
OUTPUT
Syntax OPEN "file name" FOR APPEND AS file no.
INPUT
Example 10 OPEN
11
0UTFIL. TXT
11
FOR OUTPUT AS 1
This will open the file
11
0UTFIL.TXT
11
for output from a
Basic program as file number one.
or 10 OPEN
11
APPEND.TXT
11
FOR APPEND AS 3
This opens the file
11
APPEND.TXT
11
·as file number three. Any
data written to the file will be appended. MAXFILES must
have previously been set to a minimum of three.
or 10 OPEN "INPUT. TXT
11
FOR INPUT AS 4
The file is opened for input as file number four, this will
allow the data in the file to be read by a Basic program.
Remarks When a file is OPENed HUNTER's firmware automatically
performs a checksum generation on the file and compares it
to a value stored in the file directory, when the file was
last CLOSEd. Any inconsistency will result in a 'DSK
ERROR' being returned to the user.
VER.V09F
The OPEN statement parameter FOR has three options
OUTPUT ,APPEND and INPUT, they perform the following
functions:
OUTPUT : This will open a file for output. Any data that
is in the file will be lost.
APPEND: This will also open a file for output, but any
data that is output to the file will be added to the end of
the data that is already present.
INPUT : The file is opened for input. This will allow a
Basic program to read data from the file.
The file number cannot be greater than the number specified
in MAXFILES. If MAXFILES 3 has been specified the file
number cannot be greater than three.
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