After many requests, I finally took the design of our SS-50 64K RAM board and added an EEPROM socket.

Features include:

• Provides anywhere from 0K to 64K.
• The RAM can be enabled/disabled in 4K segments via 16 switches from $0000 to $FFFF.
• The EEPROM (28C256) can be enabled/disabled in 4K segments via eight switches anywhere from $8000 to $FFFF.
• Fully compatible with the SS-50 bus. It does not support the extra four address lines of the SS-50C (6809) bus.
• Very low power.

Note that this memory board does not use any of the extended address bits on the SS-50C bus commonly used on 6809 based systems.

SS-50 RAM EEPROM Manual