Tandy 1000 Basic Reference Manual page 244

Chapter 10 I
BASIC
Keywords
OPEN
Statement
OPEN mode,[
#]buffer,[pathname][dev:][,record
length]
OPEN [pathname][dev:l [FOR model AS [#]buffer
[LEN
=
record length1
Establishes a n input/output path for a file or device.
Buffer is a n integer in the range 1 to 15.
It
specifies the 110
buffer in memory to use when accessing the file. The number
sign
(#)
is optional.
It
is provided for compatibility with other
BASICs.
Pathname
is a standard file specification as described in Chapter
1. If you omit
pathname,
you must include deu:.
deu: specifies the device to be opened for communication.
Record length is a n integer in the range 1 to 32768 that sets the
record length for direct access files. If you omit record
length,
BASIC assumes a default record length of 128 bytes. Do not use
this option with sequential access files.
Mode specifies any of the following:
0
or OUTPUT
I
or INPUT
A or APPEND
R
or RANDOM
sequential output mode
sequential input mode
sequential output and extend mode
direct inputloutput mode
In the first form of the syntax, you must use the abbreviated
form of mode, and it must be enclosed in quotation marks.
In the second form of the syntax, you must specify the complete
word for mode. You may not specify RANDOM. If you want t o
use direct access in the second form of the syntax, omit mode.
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