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Generally,
when you
make
one
or
more
peripheral
selections
in
the
1
/
0
Menu and
press
•
again,
you return
to the
previous activity at
the point
when you
pressed
•
.
However,
if
you use
the
1 /0
key
to select
a
new
RAM
area, then
when
you
leave the 1/0
Menu,
it will
be
as
if
you had
pressed
twice-
you
will
retu
rn to
the
Primary
Menu
rather
than to the
point
of
interruption.
Using the
1/0
key you manually
make all the peripheral
selections required
by your
program;
the prog
ram
does
not
do
this
for
you.
For
example,
when
you enter a
telecomputing program that normally expects
to use
the
Modem, you
must use the
1
/
0 key
to
turn
on
the
Modem input and output as
well
as any
o
ther
peripherals you
intend
to
use
while
you
are
in
that
program
.
It
is h ighly
recommended
to
make
all
necessary
peripheral
selections before you
enter
a program
,
otherwise you
can
not
make
selections when
the internal
RAM
is
occupied
full.
In this case
you
have to delete the some files
o
r
copy
the
files
to the
external
RAM
.
in
order
to
make
the peripheral
selection
possible.
One use
of
the
1/0
key is
to make peripheral
selections before
entering
program.
The
other-main-use o
f
the 1/0
key
is
to
change
peripheral
selections
wh
ile
you
are
in
a
program.
For
example,
you can do a
lot
of
editing
in a File System
file,
directly on the
LCD
Display.
Then
if
you
want
a printed
copy of
several
lines
within
the
file,
you
can
just position
the
first
line
you
want
printed
in the
Display,
use
the
110
key
to
turn
on
the
printer
and
then
use
•
to print
several lines.
When the lines
you want
are
printed
,
you can
then turn
off the
printer
with the 110
key and
conti
nue
editing
the
file.
To
use a
peripheral
properly,
you have
to
press
-
on
the
HHC
before connecting
or
disconnecting
the
peripheral.
When you press
•
after
changing
peripheral
connections,
the HHC
examines all of
the bus slots to
determine
what
peripherals
are present
at the
moment.
When
the
HHC
detects
the different peripherals in
slots
from
before,
the HHC
returns to
the
Primary Menu and all
peripherals
are
turned
off.
As you physically plug or unplug
peripherals
into
the
HHC itself
or
into the
110
Adaptor,
the
HHC will beep as
the
connection is
made.
When the peripheral is fully
inserted,
the
beeping
will
stop
.
The beep indicates that
the
connection
is
incomplete,
and
if
a peripheral
should
become partially disconnected from
the
HHCor
the
110
Adaptor,
the
beeping
will warn you to push
the peripherals
in
firmly.
The bus connectors
on
the
HHC
and the peripherals are
keyed in
such
a
way
that
the
peripheral
must be
inserted with
its
front
up;
you should not
try,
and
will
not be
able
to,
insert
a
peripheral
in
an upside-down position
.
When no
peripherals are attached,
pressing
•
causes
the
status
of the Internal
Memory storage
to
be displayed
.
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