192x64 display EPROMs must be 120 ns or faster

The 27040 display EPROMs on Maverick and later need an access time of 120 ns or better. A 150 ns or slower part will not work reliably.

Systems

• Data East/Sega CPU Version 3b

Games

• Batman Forever
• Baywatch
• Mary Shelley's Frankenstein
• Maverick

Related tips

• Maverick: CPU and display EPROM types and latest versions
• Frankenstein: CPU and display EPROM types and latest versions
• Baywatch: CPU and display EPROM types and latest versions
• Tommy: CPU and display EPROM types and latest versions
• Tales from the Crypt: CPU and display EPROM types and latest versions
• Guns N' Roses: CPU and display EPROM types and latest versions
• Last Action Hero: CPU and display EPROM types and latest versions
• WWF Royal Rumble: 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)