Wikipedia over de Motorola 68000 CPU :
The design implements a 32-bit instruction set, with 32-bit registers and a 16-bit internal data bus.[2] The address bus is 24 bits and does not use memory segmentation, which made it easier to program for. Internally, it uses a 16-bit data arithmetic logic unit (ALU) and two more 16-bit ALUs used mostly for addresses,[2] and has a 16-bit external data bus.[3] For this reason, Motorola termed it a 16/32-bit processor.
As one of the first widely available processors with a 32-bit instruction set, and running at relatively high speeds for the era, the 68k was a popular design through the 1980s. It was widely used in a new generation of personal computers with graphical user interfaces, including the Macintosh, Amiga, Atari ST, and X68000. The 1988 Mega Drive console is also powered by a 68000.
