What is the main CPU is the Sega Mega Drive / Sega Genesis?

The main CPU of the Sega Mega Drive (Sega Genesis) is the Motorola 68000. This processor was chosen for its performance and capabilities, making it suitable for handling the advanced graphics and sound processing required for the console's games. The 68000 featured a 16-bit data bus and a 24-bit address bus, providing sufficient processing power and memory addressing capabilities for the console's software to run smoothly and efficiently. Additionally, the 68000 had a strong presence in the gaming industry at the time, making it a popular choice among console developers.