- A TYPE :: EEPROM storage function that replaces SRAM, so it can be used for generations (100,000 times!)
- B TYPE :: A TYPE + FM PAC BIOS installed to use the main unit's MSX-MUSIC sound source (It's hard to imagine that the main unit doesn't have an FM sound source)
- C TYPE :: B TYPE + Built-in OPLL sound source module
Other features include: Equipped with Kitiya's Korean BIOS, and can be used interchangeably with the original BIOS.
