Donkey Kong 4-boardset    High Score Save Kit -- Installation Guide

This is a special install guide for the 4-boardset style Donkey Kong game. From a high level, the install procedure is the same as the 2-boardset style Donkey Kong and Junior games, however, there are potentially a couple of obstacles that may need to be overcome when installing this kit into the 4-boardset style game.

First, is the loaction of the sound board. The sound board sits is the half sized board that sits on top of the CPU board. If the sound board is covering the Z80 CPU, then the sound board will have to be moved to the other half side to expose the Z80 CPU. See pictures below. fixme, add some photos.

The next potential problem is that on some boardsets, the Z80 CPU is soldered to the CPU board and is not intalled in a socket. This can be a major obstacle.

Step 0: Turn off power to the game and remove board

It is suggested that the board be removed from the cabinet before installing the kit. Pay careful attention (or label), any wire connections as you disconnect your board so that you can correctly rehookup the game PCB afterwards. All of the connectors should be keyed and the sizes different.

Step 1: Locate the CPU board

The CPU board is the board just below, the half-sized sound board.
Click for larger view

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. The Z80 chip is a 40 pin (large) chip, located at 7C (for the 2-boardset games or XX for the DK 4-boardset game). 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
Click images for a larger view
Z80 CPU Chip
High Score Daughter Card
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.

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.