EPROM language and country letters

Display EPROM versions before Apollo 13 carry a letter: A English, G German, F French, S Spanish, I Italian. CPU EPROMs came in about 17 country variants that mainly change default pricing; other letters include B Belgium, C Canada, J Japan and N Switzerland.

Systems

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

Related tips

• Changing the display language
• 192x64 display EPROMs must be 120 ns or faster
• 128 x 32 controller: R11 sets the EPROM size
• 192 x 64 display needs 120 ns or faster EPROMs

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