Donkey Kong Junior High-Score Save

Overview

Now Donkey Kong Jr. is about as much fun as the original, so this it made sense to look at this as the next highscore save. As the hardware is virtually identical it made the porting and code modifications thankfully quite straighforward.

Again I've tried to documented both the hardware theory and the software for the complete upgrade, including the source code.

Theory of Operation

The serial EEPROM 93C56

Link to the Datasheet, at Microchip.com

Board Connections Overview

Board Connection Wiring Close Up

Click For Details

Updated Program Code

Click to Download

*note* these are ONLY useful if you have the
ORIGINAL Kong Junior boardset *

This is NOT a full set of images, it is
ONLY the 2 modified EPROMs

Parts Required

1 x ST93C56 or 93LC56A or ST93C66A

NOTE: The EEPROM must be the 256x8 type from either ST Microelectronics, or Microchip.
The ST93C66 is a 512x8 serial EEPROM this will also work.
2764 EPROMs x 2

For serial EEPROMs check http://www.digikey.com or http://www.mouser.com

Back to the high-score saves