Donkey Kong Junior    High Score Save Kit -- Installation Guide

Step 0: Turn off power to the game

It is possible to install this kit without removing your board from its cabinet, however, you may find it easier to install the kit if you do remove the board. In that case, pay careful attention (or label), any wire connections as you disconnect your board so that you can correctly rehookup the game PCB afterwards. If your board uses the large 44 pin edge connector, take note of which side of the connector is facing the parts side of the board and which side faces the solder side, This connector is typically not keyed and can be inadvertantly plugged in backwards - ouch! It is recommended that you label the connector faces with something like "parts side" or "solder side".

Step 1: Locate the CPU board

CPU Boards
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JR
Donkey Kong Junior

Step 2: Remove the Z80 CPU chip

Locate and remove the Z80 chip on the CPU board. Use the above photos to assist in locating it. See Z80 Chip Identification for additional information. The Z80 chip is a 40 pin (large) chip, located at 7C. Remove the chip gently by using a flat head screwdriver to pry it out of its socket from each end. Becareful not to bend any of the pins. If any pins do get inadvertantly bent, you will need to straighten them out before the next step. Needle nose pliers work the best for this.

Step 3: Insert the Z80 into the daughter card

Insert the just removed Z80 chip into the empty 40 pin socket on the High Score Save Kit. Make sure pin-1 is correctly oriented. Pin-1 is marked on the Z80 chip usually by some type of indentation or circle molded into the plastic. The end of the chip with the marking, needs to match up with the socket on the daughter card that also has a marking on the plastic. Pin-1 is also labelled on the kit pcb with a "1".
Pin-1 Identification
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Z80
Z80 CPU Chip 		HS2
High Score Daughter Card 		HS2
Pin-1 Identification

Step 4: Insert the daughter card into the CPU board

Insert the daughter card back into the Z80 socket on the CPU board where the Z80 chip was originally removed from. Again, make sure pin-1 of the Z80/daughter card is oriented to correctly match pin-1 on the CPU board. Use the photos as a guide.

The header on the daughter board has pins that are more heavy duty than the original Z80 pins, thus you will need to press very firmly to get the daughter card to be fully inserted into the original Z80 socket.

Step 5: Double check your work

Review the steps and double check that Z80 is properly installed into the daughter card with no bent pins and that it is correctly oriented for pin-1. And that the daughter card is also installed snug into the z80 socket with pin-1 matched up. Lastly, verify the jumper is selected to match your game.

Step 6: Powerup and game and enjoy!

Reinstall your board into the cabinet if necessary, and then powerup your game. You should immediately see the bootup screen. You will have 5 seconds to press P1 and enter setup mode, or the game will timeout and automatically transition to gameplay mode.

If the game does not come up, turn power off immediately, double check your work, and read over the trouble shooting section.