Run the latest CPU and display EPROM versions

Many games had several CPU and display EPROM releases with real fixes. The display EPROMs (Checkpoint on) live on the back of the dot matrix display assembly. Changing them also changes the language or country the game shows at power-on.

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Related tips

• Time Machine: CPU and display EPROM types and latest versions
• Robocop: CPU and display EPROM types and latest versions
• The Simpsons: CPU and display EPROM types and latest versions
• Checkpoint: CPU and display EPROM types and latest versions
• Batman: CPU and display EPROM types and latest versions
• Hook: CPU and display EPROM types and latest versions
• Tommy: CPU and display EPROM types and latest versions
• Maverick: CPU and display EPROM types and latest versions

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Two, Clay Harrell (pinrepair.com)