Tandy 1000 Basic Reference Manual page 23

Chapter 21 Loadim
MS-DOS
and
BASIC
<Input-file
tells BASIC to receive input from
input-file
instead
of the usual standard input (the keyboard). This option must fol-
low pathname and precede all other options in the command line.
Redirection of input and output is discussed later in t h i s
chapter.
>[>lOutput-file
redirects BASIC's output to
output-file
instead
of the standard output (video display). If you specify 1 greater-
than sign,
output file
is overwritten. If you use 2 greater-than
signs, it is appended. This option must follow
input file
(if given)
and precede all other options in the command line. Redirection of
input and output is discussed later in this chapter.
IF: specifies the maximum number
of data files that may be
open a t any one time. If you specify the IF: option, you must also
specify the /I option. If you omit this option, the number of files
defaults t o three. The number of open files that MS-DOS sup-
ports depends on the value given for the FILES= command in
the CONFIG.SYS file. We recommend that you set FILES
=
10
for BASIC. BASIC automatically reserves 4 files for internal use.
This leaves 6 for BASIC file IIO; thus lF:6 is the maximum sup-
ported by MS-DOS when FILES= command is set to 10 in the
CONFIGSYS file.
Each file you specify may use a maximum 190 bytes of memory.
Sequential access files always use 190 bytes of memory. The
amount of memory a direct access file uses depends on the
record size set with the
I S :
option. Each direct access file uses 62
bytes of memory for the file control block, plus the record size.
For example, if you specify a record size of 50 with the IS:
switch, the file uses 112 bytes.
1s:
specifies the maximum record size for direct access files. If
you use the IS: option, you also must specify the /I option. If you
omit the
is:
option, BASIC assumes 128 bytes.
IC: specifies the size of the receive buffer for each RS232 commu-
nications channel present in the system. The maximum amount
you can specify depends
on
the number
of RS232 cards
present
in the system and on the method used t o load BASIC.
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