GamePlan pinball machines were made from 1978-1985, and all used a Z80 based MPU. The original design used an onboard battery that would leak over time, causing severe damage. This is where the new Multi MPU board comes in.

Improvements/Features:

• Leverages NVRam to eliminate the onboard battery
• Has all ROMs from the produced GamePlan machines in one location, that can be chosen by 4 dip switches
• Has onboard LED indicators to show that the different power rails are working
• Less components, and components have been chosen that are still produced

Version 1.5

• Fix trace routing for Cocktail BDU Display connector
• Add jumper pads for NVRAM
• Add labels to pinouts
• Add labels to Vias

Version 1.4

• All vias enlarge to support wirewrap 28ga if necessary
• Vias are not tented

Version 1.3

• Add more Vias to power rails for redundancy
• Keep Vias exposed for troubleshooting
• Add Battery option for 6264 RAM vs NVRam use
• Add Ext battery connector for off-board battery option
• NOTE: If using NVRAM, install a wire jumper at D59

Version 1.2

• Mounting holes enlarged to 5/32
• Label for key on J7 moved to pin 3