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Radio Shack TRS-80 PC-3

Radio Shack TRS-80 PC-3
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ME
RG
E
Combines
a
program
on
tape
with
one
al
ready
in
memory.
PRINT#
Saves
the
contents
of
variables on
tape.
INPUT#
Retrieves
the
contents
of
variables
from
tape.
CHAIN
Starts
execution
of
a program
which
has been
stored
on
tape.
Programs
may
be
assigned filenames which will
be
stored
on
the
tape. This allows
the
unambigous
storage
of
many
programs
on
one
tape.
Programs can
then
be retrieved
by
name
and
the
tape
will be
searched
to
find
the
appropriate
file.
If
programs have
been
password-protected
in
memory,
they
cannot
be
stored
on
tape,
but
a password can be assigned
at
the
time
that
unprotected
programs are
CSAVEd.
Such
password-protected
programs can be used by
other
person,
but
they
will
not
be able
to
LIST
or
modify
the
programs in
any
way.
See
Chapter
8
for
details on
all
these verbs
and
commands.
When a program
or
data
is
recorded on
tape,
it will be preceded by a high-pitched
tone
of
approximately
7
seconds.
This
tone
serves
to
advance
the
tape
past
any
leader
and
to
identify
the
beginning
of
each
program
or
set
of
data.
NOTE:
Whenever
you
wish
to
read
in
something
from
tape,
it
is
essential
that
the
tape
be
positioned
on one
of
these
leader
tone
areas.
When searching
for
a
filename,
the
tape
can read
only
in
a forward
direction.
This search
is
relatively
slow,
so
it
is
sometimes
preferable
to
keep
track
of
program
locations
by using
tape
counter.
Using fast
forward,
rewind
or
play,
the
tape
can be manually
positioned
to
the
leader
tone
area
of
the
correct
program
before
the
retrieval
is
started.
While scanning
the
tapes,
you
will be
able
to
hear
the
high
tones
which
begin each
program.
In
between
these high
tones
will be a mixed high
and
low
tone
sound
which
indicates
programs
or
data.
88

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