Vector Basic Interpreter Basic 80 Reference Manual - page 141
APPENDIX B
BASIC-SO Disk I/O
Disk I/O procedures for
the
beginning
BASIC-SO
user
are
examined in this appendix.
If you are new to BASIC-SO or if
you're getting
disk
related
errors,
read
through
these
procedures
and
program
examples to make sure you're using
all the disk statements correctly.
Wherever a
filename
is
required
in
a
disk
command
or
statement,
use
a
name
that
conforms
to
your operating
system's requirements for
filenames.
The
CP/M
operating
system
will append a default extension .BAS to the filename
given in a SAVE, RUN, MERGE or LOAD command.
Here is a review of the
commands
and
statements
used
in
program file manipulation.
Writes to disk
the
program
that
is
currently
residing
in
memory.
Optional A writes
the
program
as
a
series
of
ASCII
characters.
(Otherwise, BASIC
uses
a
compressed
binary format.)
Loads
the
program
from
disk
into
memory.
Optional
R runs the program
immediately.
LOAD always deletes
the
current
contents of memory and closes
all files before
LOADing.
If
R
is
included, however, open data files are
kept
open.
Thus
programs
can
be
chained
or
loaded
in
sections
and
access the same data files.