CMD RamDrive C-64 User manual

IMPORTANT!!!
ADDITIONAL INSTALLATION
INSTRUCTIONS
Please Read Before Installing RamDrive
Due to unexpected wide variances in computer timing, some changes have been made to
RamDrive to assure proper timing with all computers. It is necessary for some systems to
connect a clip within the computer to assure proper operation with RamDrive. The majority of
timing problems arise in older C-64 and SX-64 systems.
The clip installation procedure is not required but is optional for RamDrive installations which
pass the HARDWARE TEST program supplied. The clip installation procedure is required for
systems that fail the HARDWARE TEST program. To dertermine if a system requires this
modification run the HARDWARE TEST. The HARDWARE TEST program should be run again
after any hardware modifications are made to the computer system to which a particular
RamDrive is attached.
There is no way to determine how long the test should run on a particular system. A run time of
two hours or more will provide a reasonable test. If you have doubts about your system’s
hardware compatibility with RamDrive, then intall the clip.
The following procedures detail the installation of a jumper clip in your computer. This
procedure requires no soldering, and only should requires afew minutes to complete. The
procedure will require a Philips Screwdriver. Note: Some computers may need a TORX (satr
head) size T10 driver. TORX drives are common and may be found at Sears and other
hardware and automotive supply stores. Often a 5/64 inch allen will serve in place of a T10
TORX driver.
Additonal Clips are available from CMD for $3.00 each plus shipping.
WARNING
Always protect your equipment by discharging any static electricity from yourself. You
maydo this by touching any grounded metal surface. For complete protection, use static
protection devices, such as anti-static wrist wraps.
If you have any doubt about your ability to accomplish this procedure safely, take your
computer to a qualified technician for installation. Neither PPI or CMD can accept
responsibility for any damages caused by the user in performing any installation.

RAMDRIVE C-64 Installation
Step 1. Make sure that the computer power switch OFF and that any peripherals –(disk drives, etc.)
are turned off.
Step 2. Unplug the computer’s power supply cord from the wall outlet, outlet strip, etc.
Step 3. Unplug all cables from the computer (power, joystick, serial calble, monitor cable, etc).
Step 4. Remove any devices pluged into the Cartridge, Cassette or User ports.
Step 5. Turn the computer u[side down on a suitable work surface. Remove the three screws holding
top and the bottom halves of the case together, See figure below for location of these screws.
Step 6. Turn the computer back over top up. Separate the upper and lower case halves at the seam
along the front of the computer and carefully lift the front edge of the upper half of the case
assembly. Continue to lift until you gain access to the inside of the computer.
Step 7. Unplug the keyboard cable from its connector on the main circuit board. The cable me be a
snug fit and a little difficult to remove. If so work it off carefully by alternately lifting each end
of the connector.
Step 8. Remove the power indicator light cable from its connector on the right side of the circuit board
and then remove the upper half of the case assembly. Be careful of the plastic tabs at the rear
of the upper half of the case assembly which slip into remaining slots in the lower half of the
case assembly.
C-64 Owners Note: The C-64C model is slightly different in design and layout than the
earlier C-64 computers and requires special steps during disassembly and assembly. In
the procedure that follows, the additional steps required for the C64-C are enclosed
within a box.
C64-C Note: The C-64C case differs slightly from the one shown below. It does, however
have the same the three screws holding the top and bottom halves of the case together.
Remove these screws
C64-C Note: Detach the keyboard from the lower case assembly by removing it retaining screws
and sliding it out from under the plastic tabs at the front of the case. Place the keyboard carefully
to one side.

Step 9. Some 64s have a cardboard/foil or metal shield covering most of the circuit board components.
If your computer has one of these shields, remove it at this time. The shield is held in by
self-taping screws.
Step 10. For 6.5 inches wide circuit boards (C64 and C64-C): Locate resister R44 in one of the two
areas shown. The exact location of R44 may vary slightly from the shown diagrams. Attach
the clip to the resister as shown. Make sure that the metal portion of the clip does not touch
any other pin or any other portion of another component.
For 5.) inch wide circuit boards (C64-C): Locate the pin 28 of IC labeled U6 as shown in the
Diagram. Attach the clip to pin 28 as shown in the expanded view. Make sure that the metal
portion of the clip does not touch any other pin or any other portion of another component
Inside view of C64 / C64-C
Inside view of C64 / C64-C
Inside view of C64 / C64-C

Step 11 Carefully feed the other end of the clip assembly (the end wit the xmaller connector on it)
through the opening in the upper right corner of the shield located over the Cartidge Port.
If you wish, you may secue the clip assembly wire near the clip with a piece of electrical
Tape, by taping in to the circuit board a few inches away from the clip.
Step 12. If your computerhas a cardboard/foil or metal shield which covers the circuit board, replace it
at this time.
Step 13. Take the upper half of the case assembly and rest it ina tilted position on the lower case
Assembly. Make sure the tabs at the rear of the upper half of the case assembly fit properly
Into their notcher in the lower half.
Step 14. Reconnect the power-on indicator light cable on to the circuit board. Make sure it mounts
Properly over the pns protruding from the cicuit board.. Note: Cable orientation (position of
The red and black wires)is not critical.
Spet 15. Reconnect the keyboard to its connector on the circuit board. The cable connector is “keyed”
Make sure that the “key” of the connector (the positon with no hole) lines up properly with
the missing pin on the circuit board holder.
Step 16. Tilt the upper half of the case assembly back down into place on the lower half. Turn your
computer back over (uoside –down), and replace the three screws removed in step 5.
Step 17. Place the computer back onto an upright position, Replace power supply and other cables
Which are normally attached to your computer. Remebering to plug the power supply back
Into a working outlet.
Step 18. Perform RamDrive Clip Connector Installation as described on last page of this document.
C64-C Note: Reinstall the keyboard in the lower assembly. Make sure the the front edge of
the keyboard seats properly under the plastic tabs at the front of the lower case assembly, and
then replace the keyboard mounting screw.

RamDrive C-128 Installation
Step 1. Make sure that the C-128 power switch is OFF and any peripherals attached to the C-128 are
also switched OFF.
Step 2. Unplug the C-128 AC power cord from it’s outlet.
Step 3. Unplug ALL cables from the C-128.
Step 4. Remove all devices plugged into the User and the Cartridge ports.
Step 5. Turn the C-128 upside-down. Remove the six scres holding the top and bottom halves of the
computer together.
Step 6. Turn the C-128 back over into its normal position. Separate the upper and lower case
Assemblies at the seam along the left side of the computer. Lift the left side of the keyboard
Assembly until it is tilted upward far enough for you to gain access to the insde of the
computer.
Step 7. Unplug the indicator light cable from the left side of the circuit board.
Step 8. Unplug the keyboard cable from the C-128 circuit board and unfasten the keyboard ground
strap. Place the keyboard off to one side. Note: the keyboard connection may be a bit snug
fit. If so, work if off carefully by alternately lifting each end of the connector.
Step 9. Remove the screw securing the metal shield that covers the circuit board, Untwist the metal
tabs around the perimeter of the shield. Remove the shield. Note: the shield maybe soldered
at a point along the right side of the circuit board. If so, you can: 1 Unsolder the shield.
2. Breaker the solder by twisting the shield (no ned to solder back later): 3. Leave the soldered
shield in place and bend it out of the way off to your right.
Step 10. Locate the PLA chip which is the intergrated circuit labeled U11. Attach the clip to pin 41 of this
IC as shown in the diagram below.
Step 11. Carefully feed the other end of the clip assembly (the end with the small connector on it)
through the opening in the upper right corner of the metal shield located over the Cartridge
Port. If you wish, you may secure the clip assembly wire near the clip with a piece
of electrical tape, by taping it to the circuit board a few inches away from the clip.
Step 12. Replace the keyboard grounding strap and reconnect the keyboard cable to circuit board.
Step 13. Tilt the keyboard assembly back towards its normal position on top of lower case assembly.
Step 14. Reconnect the power-on indicator light cable to its connector on the C-128 circuit board
. Note: Cable orientation is not critical.
Step 15. Fit the upper keyboard assembly into place on top of the lower case assembly. Turn the
C-128 upside down and replace the six screws which hold the upper and lower halves of
the case together.
Step 16. Proceed with the RamDrive Clip Connector Installation Procedure found at the end of this
document.

RAMDRIVE SX-64 Installation
Step 1. Make sure the SX-64 power switch is OFF. Also make sure that any peripherals (disk drives,
Printer, etc) are attached to the SX-64 are also switched OFF.
Step 2. Unplug the SX-64 power supply cord from its AC outlet.
Step 3. Unplug all cables from the SX-64, including (if attached), AC power supply, cable, keyboard
cable, joystick or mouse cables(s), video cable, serial bus cable.
Step 4 If a disk is present in the SX-64 disk drive remove the disk.
Step 5. Remove all cartridges or interfaces from the user port and from cartridge port.
Step 6. Remove the eight screws from the rear of the SX-64.
Step 7. Remove both side rails from the SX-64 by sliding them toward the rear of the computer.
Step 8. Remove the top cover retaining screws from each side of the SX-64 top cover.
Step 9. Remove the SX-64 top cover.
Step 10. Locate the SX-64 CPU circuit board. This is the board which runs parallel to t he side of the
Computer and is adjacent to the disk drive mechanism and cartridge port.
Step 11. Locate the integrated circuit labeled UE4. Attached the clip to pin 7 of UE4 as shown in the
diagram below. Depress the cartridge port slots and run the wire through the cartridge port.
Do not run the wire around the since the top cover will block its exit.
Step 12. At this time the computer may be reassembled. Replcace the top cover and retaining screws,
replace the side rails and rear screws.
Step 13. Proceed with the RAMDrive Clip Connector Installation procedure at the end of this document.

RAMDRIVE C-128D Installation
Step 1. Make sure the C-128D is switched OFF and that any peripherals attached to the C-128D are
also switched OFF.
Step 2 Unplug the C-128D AC power cord from the outlet.
Step 3. Unplug all cables from the C-128D and remove any devices plugged into the Cartridge and
User ports.
Step 4. Turn the C-128D upside down and remove the top two cover screws located on edge of the
case near the front corners.
Step 5. Turn the C-128D onto its upright position and remove the three screws on the back, on the left
top and right outside edges where the top cover folds over onto the back of the case.
Step 6. Slide the top cover of the C-128D back about one inch towards the rear of the computer. Then
Remove the top cover by lifting it straight up.
Step 7. Locate the PLA chip U11 and connect the clip to pin 41 as shown in the diagram below.
Step 8. Carefully feed the other end of the clip assembly (the end with the small connector on it)
through the opening in the upper right corner of the metal shield located over the Cartridge
Port. If you wish, you may secure clip assembly wire near the clip with a piece of electrical
tape, by taping it to the circuit board a few inches away from the clip.
Step 9. Replace the C128D top cover. To do this, first lower the cover straight down back about one
inch, so that the tabs and holes on the top cover and base assembly align. Next slide the
Cover forward and into position. Replace the five mounting screws that secure the cover
below and at the rear.
Step 10. Continue with the RAMDRIVE Clip Connector Installation Procedure , see last page.

RAMDRIVE Clip Connector Installation Procedure:
Step 1. Locate the connector end of the Clip assembly, which should be near the rear of your computer
On the end of the wire coming out of the Cartridge Port opening. Hold the connector with the
two tabs pointing down, and the open end pointing away from the rear of your computer.
Step 2. Remove the short jumper located on the end of the connector inside the RAMDRIVE by simply
pulling it off the two posts of the connector. Save the tiny jumper in a safe place for possible
later use.
Step 3. Place RAMDRIVE near the computer’s Cartridge Port and hold it so that you can see the
mating connector just inside the throat of the Cartidge Port mating connector. See the
diagrams below to help locate this connector.
.
Step 3: Slide the Clip Assembly connector onto the mating connector inside RAMDRIVE, making sure
that the pins are properly aligned.
You may now continue with the normal RAMDRIVE installation instructions in
your RAMDRIVE Users Manual. Make sure that when you plug your RAMDRIVE
into your computer that the wire on the Clip assembly does not interfere with the
connection or become kinked or damaged.
Important: Save this jumper. The shorting jumper must be replaced when using your
RAMDRIVE on a computer which does not need a clip installed. Also the shorting jumper must
be installed on RAMDRIVE to pass the HAREWARE TEST to determine if a clip installation is
necessary before using your RAMDRIVE on other computers
Important: Wire Connects to Right Side Pin
Important: Wire Connects to Right Side Pin