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Desktop
TRS-80
Owner's manual
Radio Shack TRS-80 Owner's Manual page 109
Mini-disk operation disk operating system disk basic programming language
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Also See for TRS-80
:
Reference manual
(274 pages)
,
User manual
(236 pages)
,
Service manual
(199 pages)
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DISK
BASiC
Introduction
Start-Up
Under trsdos
ready,
type:
BASIC
flNTEffi
trsdos
will
load
basic and begin
the
"initialization
dialog."
If
you want
to
recover
a
Disk
basic
program
after
returning
to
trsdos
for a
dir
or other
trsdos
command,
use
this
command
under
trsdos ready:
BASIC
*
CENTO
You
will
go
directly
to
Basic's
ready mode
without any
initialization
dialog.
If
you had
a
program
in
memory,
it
should
still
be
there.
You
may
not
be
able
to
run
the
program.
To
be
safe,
you
should immediately save
the
program, go
to
trsdos,
then
start
basic again (no
asterisk).
Note:
If
you have
overlaid user
memory
while
in
trsdos, your
program
will
be
erased. In
such
a
case,
you
should
not
restart
basic, but should use
the
normal
basic
start-up
procedure.
Initialization
When
you
start
Disk
basic,
you
are
first
asked,
HON MANY FILES?.
This
lets
you
specify the
maximum
number
of
files
that will
be
"open "
or
in
use
at
once.
(See open.)
Type
in
an
appropriate
number
and
press
(ENTER),
or
simply
press
(ENTER)
and basic
will
provide
for three
files.
For example,
if
your
program
requires
one
input
file
and one
output
file,
you
should ask
for
two
files.
Note: Normally, basic
will
give
all
your
data
files
a
record length of 256.
(See
File
Access Techniques.)
If
you wish
to set
the
record length of
each
file
individually,
use
the
suffix
v
for
"Variable"
after
the
number
of
files.
For example,
HOW MANY
FILES?
3M
(ENTER)
tells
basic
to
give
you
three
ile-buffers,
and
to
let
you
set
the
record length of
each
file
when
that
file is first
opened.
Note: Disk basic
automatically
creates
a buffer
for loading,
saving,
and
merging basic programs.
This
buffer
exists in
ram
below any
data
file
buffers
you
may
request.
It
is
always
available for
program
i/o,
regardless
of
how
you
answer
the files? question.
91
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This manual is also suitable for:
Model iii
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