Gerry on Twitter: "Check this out! A Gameboy Cartridge used as a GUI interface for tweaking the ECU (Engine control Unit) computer...for Aprilia scooters. These were Manufactured by the company Orbital in
Aprilia SR 50 DiTech Gameboytrim / ECU Derestriction - YouTube
Gameboy interface
Aprilia Ditech Interface GameBoy Color - Kupindo.com (27247277)