Tandy TRS-80 Owner Manual & Programming Manual page 96
Color computer disk system
Hide thumbs
Also See for TRS-80:
- Technical reference manual (204 pages) ,
- Service manual (60 pages) ,
- Owner's manual (16 pages)
Table of Contents
Advertisement
APPENDIX
H.
BASIC
WORD
DISCUSSED
CVNistring
variable)
50
Converts a
5-byte
coded
string (created
by
MKN$)
back
to
the
number
it
represents.
x=cvnia$)
DIRdrive
number
11
Displays a directory of the disk in the drive
number
you
specify. If
you
omit
the
drive
number,
the
Computer
will
use
drive
0.
(Unless
you
use the
DRIVE
com-
mand
to
change
this default.)
This
is
a
typical directory display:
MYPROG
BAS
B 3
Y0URPR0G
BAS
A
1
HERDATA
DATA
1
A
5
USRPROG
BIN
2
B
2
The
first
column
is
the
name
of
the
file.
The
second
column
is its
extension.
The
third
is
the
file
type
(0
=
BASIC
program,
1
=
BASIC
data
file,
2
=
machine
lan-
guage
file,
3
=
editor
source
file).
The
fourth
column
is
the storage
format
(A
=
ASCII,
B
=
Binary).
The
fifth
column
is
the
file
length
in
granules.
DIR0
DIR
DRIVE
drive
number
11-15
Changes
the drive default
to
the
drive
number
you
specify. If
you
do not use the
DRIVE
command,
the
Computer
will
default
to
drive
0.
DRIVE
1
DSKINIdriue
number
8
Formats
a
disk in the drive
number
you
specify.
Executing
this
command
will
erase
memory.
DSKINI0
DSKINI1
DSKI$
drive
number,
track,
sector,
string variablel, string variable2
61-62
Inputs data
from
a
certain
sector
within a
certain track
on
the disk
in drive
number.
The
first
128 bytes
of
data are input
into string variablel;
the second
128 bytes
into string variable2.
DSKI$
0.
12
.
3i
M*
t
N$
DSKO$
drive^number,
track,
sector,
stringl,
string2
61-62
Outputs stringMata
into
the
sector, track,
and
drive
number
you
specify,
stringl
is
output
into
the
first
128 bytes
of
the
sector;
string2
is
output
into
the second
128
bytes.
Used
improperly,
this
command
could garble the contents
of
the
disk.
DSK0$
0, 2,
1
,
"FIRST DATA", "SECOND DATA"
EOF
(buffer)
27
Returns
a
if
there
is
more
data
to
be read
in
the
buffer
and
a
-
1
if
there
is
no
more
data
in
it.
(See
OPEN
for
buffer
numbers.)
IF
EOFU)
=
-1
THEN CLOSE
«1
FIELD
#
buffer, field size
AS
field
name,
.
.
.
48-49
Organizes the space within a
direct
access buffer into
fields.
(See
OPEN
for
buffer
numbers.)
You
specify
the
size
and
name
of
each
field.
FIELD
»1»
10
AS A*.
12
AS B$
.
5
AS C$
86
Advertisement
Table of Contents
