INSTALLATION INSTRUCTIONS
for the Disk II

Your Disk II drive has been modified to reduce electromagnetic
Interference. The procedure for connecting the modified Disk II to
the Apple is different from the procedure described in the DOS manual
and in the manuals for Language System products like Apple Pascal.
Follow the instructions here carefully to install your Disk II
drive(s). Disregard the sections in your other manuals that describe
connecting the Disk II to the Apple. If installation of the Disk II
sounds difficult or if it becomes too difficult at any point, ask
your dealer to help you do it. It's very important to connect your
Disk II to your Apple CORRECTLY.

You'll need :

    * Your Disk II drlve(s), with their ribbon-like cable(s) fully
      extended
    * Your disk controller card, unwrapped
    * The rectangular metal clamp and the screw that come in a
      plastic bag in your disk drive package
    * A Phillips screw driver
    * Your Apple

Before beginning, read over the entire procedure. You can cause
permanent damage to your Apple and your disk drive by not following
these steps precisely.

Some of the steps include additional instructions for installing two,
three and four disk drives.
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1. Turn off the power switch at the back of the Apple!

2. Remove the cover of the Apple by pulling up on the cover at the
rear edge (the edge farthest from the keyboard) until the two corner
fasteners pop apart. Then, carefully slide the cover back away from
the keyboard until it comes free. Put the cover aside.

3. Remove the clamp and screw from their plastic bag. Note that a
small round nut is affixed to one side of the clamp, centered over
holes in the clamp. With one hand, squeeze together the sides of the
clamp. With the other hand slide the screw into the hole in the side
of the clamp farthest from the nut. Slide the screw through to the
side of the clamp with the nut. Then give the screw a few turns
until its end is flush with the nut.

4. Now look at your disk drive's ribbon-like cable. It has a
connector at its end (with little holes in it) and a flap with a
metal tab on its side. Slide the connector through the long, oval
opening in the metal clamp in the same direction that you slid the
screw, from the side without the nut through to the side with the nut
attached to it. Then pull the cable through the clamp until the
cable's flap with the metal tab is between the two sides of the
clamp.

Notice that the long outer edges of one side of the clamp curl in
toward the other side of the clamp. When the disk drive's cable is
correctly in place, the metal tab on the cable's flap should fit
snugly into this curl. -

FOR 2 DRIVES; One at a tine, slide the drive cable connectors
through the long, oval opening in the metal clamp, making sure the
cable flaps are facing outward and in opposite directions. Then pull
the cables through until their flaps are between the two sides of the
clamp. Position the flaps so their metal tabs fit into the clamp's
curled edges, as shown in Figure 1 below. (The metal clamp is shown
cut apart.,) Figures 1 and 2 show the clamp's position as seen from
the back of the Apple, not as seen from the keyboard.

FOR 4 DRIVES: One at a time, slide the drive cable connectors
through the long, oval opening in the metal clanp, making sure that
the flaps of two cables face out towards one outer edge of the clamp
and .that the other two cables flaps face out towards the other outer
edge of the clamp. Then pull the cables through until all their
flaps are between the two sides of the clamp. Next separate the four
cables into two pairs by sliding two cables down in the oval opening
towards the screw and sliding the other two cables up towards the end
of the clamp labeled TOP. Make sure each of these pairs has its two
flaps facing in opposite directions. Get the flaps into the
positions shown in Figure 2 above. This may take some wiggling of
the cables and even some pushing around of the flaps with your
fingers. If so, please wiggle and push CAREFULLY!

NOTE FOR 3 DRIVES: If you're installing 3 disk drives, follow the
procedure described for 4 drives above as closely as possible. Where
the instructions tell you to separate the cables into two pairs,
slide one of the cables down towards the screw and the other two up
toward the TOP label (flaps facing opposite directions). Have the
flap of the third, unpaired cable (that you slid down towards the
screw) facing outward and towards slot #7 and make sure it's
correctly positioned under the curled edge. Use Figure 2 above for
your guide in positioning the flaps, imagining the lower, right-hand
flap in that figure absent.

5. Locate the notches in the back of the Apple's case: three deep
ones and two shallow ones. In this step, you'll slide the clamp down
over the third deep notch from the left (as seen from the keyboard
side of the Apple).

Hold the cables and clamp in the arrangement described in step 4 for
the number of drives you're Installing. Being careful not to scratch
the paint inside the Apple case, slide the clamp down over the third
notch from the left, making sure that:

    * The side of the clamp with the screw head visible is OUTSIDE
      the Apple

    * The screw goes down into the notch first so that the clamp's
      label TOP is facing up

    * The metal tabs of the drive cable flaps are INSIDE the Apple,
      held flat against the Inside of the case in the positions
      described above and not sticking out from under the curled edges
      of the clamp

    * The metal tabs fit snugly under the curled edges of the clamp,
      and do not overlap one another

6. Gently push the clamp as far down into the notch as it will go.
Tighten the clamp screw from the outside of the Apple, making sure
the flaps of the disk cables are held TIGHTLY against the inside of
the Apple's case by the metal clamp. As you do this check to make
sure that all the conditions listed in step 5 above are met.

7. (For one drive:) On your Disk II Interface card (controller
card) locate the set of pins labeled "DRIVE 1". Hold the connector
near the DRIVE 1 pins so that the cable faces away from the
controller card as shown in Figure 3 below. Line up the holes in the
cable connector with the DRIVE 1 pins, so that there are no pins or
holes left over on either end. Plug the connector onto the pins,
making sure the DRIVE 1 pins go into the matching holes in the cable
connector. Check that the cable isn't jammed between the connector
and the controller card. If it is, the connector is plugged in
incorrectly (backwards). You'll have to unplug the connector and
re-connect it, with the cable exiting the connector away from the
controller card. Otherwise you'll damage the Apple when you turn it
on.

FOR 2 DRIVES: Following the same Instructions as for the first
drive, plug the second drive's connector onto the DRIVE 2 pins on the
controller card. Make sure the cable of this connector also exits on
the side away from the controller card.

FOR 4 DRIVES: As you look at the Apple from the keyboard, you'll see
that two of the disk drive cables enter the Apple to the right of the
other two cables. Of these two cables that enter on the right, one
Is below the other. Making sure all the pins line up with holes and
that the cable leaves the connector away from the controller card as
shown in Figure 3, connect this lower right-hand cable to the DRIVE 2
pins of one of your controller cards. Then follow the same procedure
carefully to connect the upper right-hand cable to the DRIVE 1 pins
of the same controller card. Set this card aside -- DON'T plug it in
yet. To the DRIVE 2 pins on the second controller card connect the
lower left-hand cable connector, making sure there is a pin for every
hole and that the cable exits the connector away from the card.
Finally, connect the .upper left-hand cable to the DRIVE 1 pins of
this second controller card.

NOTE FOR 3 DRIVES: If you're installing three drives, first read the
instructions for 4 drives above. Then, making sure there's a pin for
every hole and that the cable exits the connector properly as shown
In Figure 3, connect the lower right-hand cable (as seen from the
keyboard side) to the DRIVE 2 pins of your first controller card.
Connect the upper right-hand cable, to the DRIVE 1 pins of this same
controller card. Set this card down on the board without connecting
it. To the DRIVE 1 pins on the second' controller card, connect the
upper left-hand cable.

8. Locate the eight long, narrow slots across the rear of the
Apple's circuit board-. The leftmost slot (looking at the computer
from the keyboard side) Is slot #0 and the rightmost is slot #7,
If you're installing one controller card and this is your first,
you'll place it in slot #6, the second slot from the right. Making :
sure the power is OFF, slide the "fingers" at the bottom of the
controller card into the appropriate slot (#6 for your first
controller card). You may have to exert pressure on the cables to
bend then to get the controller card into position. Do this gently.
Then rock the card into the slot gently, first towards the front and
then towards the back of the Apple until it is firmly seated in the
slot. Then, press down on each connector to make sure it's plugged
firmly onto the controller card. Finally, press down once again on
the card to ensure that it's firmly seated in the slot.

FOR 3 or 4 DRIVES: First read and follow step 8 above. Then locate
slot #4, the fourth slot from the right. You'll use slot #4 for your
second controller card, leaving slot #5 empty. Make sure the Apple's
power is OFF. Slide your second controller card (attached to the
left-hand cables) into slot #4. This may require some (gentle!)
force to bend the cables to correctly position the card. After the
card is in place, press down on each connector to make sure it's
plugged firmly onto the controller card. Press down once again on
the card to ensure that it's firmly seated in the slot.

9. It's a good idea to label the front of each drive with the number
that your programs will use to refer to it. If you'll be using DOS,
label each drive with its slot and drive numbers. For example, label
the drive connected to the DRIVE 1 pins of the card in slot #6 as
"Slot #6, Drive 1". If you'll be using a Pascal Operating System
based Apple product (with the Language Card), label your drives with
their Pascal volume numbers according to the following table.

10. Review these instructions, checking at each step that you have
followed them correctly and completely.

11. Replace the cover of the Apple by first sliding the front edge
of the cover into place. Then as you settle down the rear edge of
the cover, make sure the drive cables run through the notch in the
cover that corresponds to the third notch from the left in the
Apple's case. Finally, press down on the two rear corners until they
pop into place.

Digital conversion and html editing by Tiziano Garuti tix@lycomail.com