The Motorola 68000 is the 16/32-bit CISC microprocessor that served as the CPU for the original Amiga 1000, 500, 2000, and CDTV systems. Operating at approximately 7.16 MHz (NTSC) or 7.09 MHz (PAL), it features a 32-bit internal architecture with a 16-bit external data bus, enabling the Amiga to execute advanced operating system features like preemptive multitasking despite its modest clock speed. This processor's efficient design and clean instruction set provided the computational foundation for the Amiga's groundbreaking graphics and sound capabilities.