40 Macintosh
User's
Handbook
THE NUMERIC KEYPAD
The
optional numeric keypad
is
installed in a manner
similar
to
the keyboard. Follow the directions accompanying
the unit. Connect the unit
to
the Mac.
Then
connect the key-
board
to
the numeric keypad. The keyboard should operate
normally. The keypad will substitute for the keyboard when
entering numbers.
OPTIONAL SECOND DISK DRIVE
To install the optional second disk drive, locate the serial
interface connection on the back of the Mac.
It
is
identified by
the
small image
of
a disk drive etched into the plastic directly
above the socket. Find the cable which should have accompan-
ied the disk drive
and
press the end
of
the cable with the large
knobs into the socket. As with all
other
Mac connections, be
certain
that
the connector pins are correctly aligned before
attempting
to
insert the plug.
The
large knobs
on
the plug, like
those on the mouse cable, are designed for ease
of
installation.
There
is
no
need for a separate
power
connection for the
disk drive. The
Mac
will control the unit completely
and
supply
its power.
To
operate the second disk drive, simply insert a disk
into it.
The
Mac
will recognize the disk
and
its origin. The unit
will aid greatly in multi-disk operations. When using the unit as
a
data
disk for applications, be certain
that
the disk
is
inserted
before trying
to
call on it.
If
it
is
not in place, the
Mac
will
assume
that
the disk
is
to
go into the main disk drive,
and
it will
eject the applications disk.
APPLE MODEM
The Apple modem
is
used to establish communications
with
other
data
processing units
through
telephone lines.
Unpack the modem and place it near the Mac. Locate the
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