Radio Shack TRS-80 User Manual page 8

TURNING THE SYSTEM
ON
2.
To Record
a
program from
the
TRS-80,
press
the
CTR-41's
RECORD
and
PL
AY
keys
simultaneously.
Then
type
CSAVE
on
the
TRS-80 and
Hflhfrfc
l
this
command. When
the
program
has
been recorded, the
TRS-80
will
automatically
tum
the
CTR-41
off
and
flash
READY
on
the screen.
Now
you
have your program on
tape
(it still
is
in
the
TRS-80
also).
Many
computer
users
make
a
second or even a third
recording of the tape, just
to be sure
they
have a
good
recording.
NOTE: To
load the
full
4K
of
RAM
in
the
TRS-80
takes
less
than
3
minutes of tape.
Short programs
will
take only
a
few
seconds of tape.
3.
Use
the
CTR-41
's
Tape Counter
to aid
you
in
locating
programs
on
tapes.
4.
For
best
results,
use
Radio Shack's
special
10 minute
Computer
Tape Cassettes (especially
designed
for
recording
computer
pro-
grams).
If
you
use standard
audio tape cassettes,
be sure to use
top
quality,
such as Realistic
SUPERTAPE. Keep
in
mind
that
audio
cassettes
have lead-ins
on both
ends
(blue
non-magnetic mylar
material)
—
you can not record
on
the leader
portion of the tape.
Advance
the tape past the leader before recording a
program.
5.
When you
are
not going
to
use a
CTR-41
for
loading or
recording
programs,
do not
leave
RECORD
or
PLAY
keys
down
(press
STOP).
6.
To
REWIND
or
FAST
-Forward
a cassette,
you must
disconnect the
plug
from
the
REM
jack (with
REM
jack
connected, the
TRS-80
controls tape
motion).
7.
If
you want
to save
a taped
program
permanently, break off the
erase
protect tab
on
the cassette (see
CTR-41 Manual).
8.
Do
not expose recorded tapes to
magnetic
fields.
Avoid placing
your tapes near the
Power
Supply.
9.
To
check
if
a
tape has a
program recorded
on
it,
you
can disconnect
the plug
from
the
EAR
jack
(also
disconnect the
REM
plug so
you
can
control the
CTR-41 with the keys)
and Play the tape;
you'll
hear the
program
material
from
the speaker.
Turn on
the
Video
Display
by
pressing
the
POWER
button.
Tum
on
the
TRS-80 Keyboard by
pressing the
POWER
button on
the
back
(next to the
POWER
jack);
the red
LED
just
to
the
right
of the Key-
board should
light
up and
the screen
should
show
READY
.
Adjust
C
(contrast)
and
B
(brightness) controls
on
the front
of the Display for
the sharpest
display.
Set Brightness so the
background
is
gray and the
words are white.
Do
not
set
Brightness
too
high.
If
Display
does not
show
READY
,
press
the
Keyboard's
POWER
switch off
and on
again,
NOTE:
There
is
a
Reset button
inside
a
door
at
the
left
rear
of the
Keyboard
assembly. This Reset
button can be used
to
unlock a loop-
ing
program or
if
the
TRS-80 does not turn off a cassette or
in
other
such
abnormal program
situations.
One More Thought
-
',
.-'
')".;
:
You're
all
ready
now,
right? Well,
maybe. But
let's
just
prepare
you
for
the
TRS-80 and Manual with one
more thought
. . .
How
do you
"talk" to a
Computer?
In
Binary
Numbers?
In Elec-
tronics
(is
there
such a language
. .
,)?
In English
.
.
.?
Well,
we
use a simplified
form
of English
—
it's
called
the
BASIC
Language
(Beginners All-purpose
Symbolic Instruction
Code). (There
are lots
of
other
"computer
languages",
but
this
is
the
easiest.)
This
Manual
covers
Radio Shack's
LEVEL
I
BASIC.
As you go through
this
Manual
you'll learn
the different
words
of
this
simple
computer language
—
and
how
to
punctuate
(VERY
IMPOR-
TANT)
—
and
how
to
apply
all
of
it
for
fun
and
practical benefit. It's
an easy language to learn
—
but remember, you've got to
use the
language
that the
TRS-80
understands (well be
giving
you some
examples of
wrong language use
and
you'll see
what
happens).
6