Radio Shack TRS-80 Owner's Manual page 134

3K
SYSTEM
Disk-Related Features
Disk basic provides a powerful
set
of
commands,
statements and
functions
relating
to
disk
i/o
under trsdos. These
fall into
two
categories:
1.
File
manipulation: dealing with
files as units, rather
than with
the distinct
records
the
files
contain.
2. File access:
preparing data
files
for
i/o;
reading and
writing to the
files.
Under
the heading,
Fie
Manipulation,
we
will discuss the following
commands.
kill Delete a program
or data
file
from
the disk
load
Load
a
basic
program from
disk
merge Merge
an
ASCII-format
basic program on
disk with
one
currently
in
ram
run"
'program" Load and
execute a basic program
stored
on
disk
save Save
the resident
basic program on
disk
Under
the
heading,
File
Access,
we
will discuss
the
following statements and
functions.
Statements
OPEN
CLOSE
INPUT
#
LINE
INPUT#
PRINT#
HELD
GET
PUT
LSET
RSET
Functions
CVD
CVI
CVS
EOF
LOG
Open
a
file
for access
(create the
file if
necessary)
Close access
to the
file
Read
from
disk, sequential
mode
Read
a
line
of
data, sequential
mode
Write
to
disk, sequential
mode
Assign
field sizes
and
names
to
random-access
file
buffer
Read from
disk,
random
access
mode
Write
to disk,
random
access
mode
Place value
in specified buffer
field,
add
blanks
on
the
right to
fill
field
Place value
in specified buffer
field,
add
blanks
on
the left
to
fill
field
Restore double-precision
number
to
numeric form
after
GETting
from
disk
Restore
integer
to
numeric form
after
GETting
from
disk
Restore
single-precision
number
to
numeric form
after
GETting
from
disk
Check
to
see
if
end of
file.
encountered during
read
get
current record number.
118