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Motorola 68000 series

This article is about the family of microprocessors. For the first such microprocessor in that family, see Motorola 68000.
Motorola 68000 series
DesignerMotorola
Bits32-bit
Introduced1979 (1979)
DesignCISC
BranchingCondition code
EndiannessBig
Registers
  • 8 × 32-bit data registers
  • 7 × 32-bit address registers
  • stack pointer (address register 7)
  • 8 × 80-bit floating-point registers if FP present

The Motorola 68000 series (also known as 680x0, m68000, m68k, or 68k) is a family of 32-bit complex instruction set computer (CISC) microprocessors. During the 1980s and early 1990s, they were popular in personal computers and workstations and were the primary competitors of Intel's x86 microprocessors. They were best known as the processors used in the early Apple Macintosh, the Sharp X68000, the Commodore Amiga, the Sinclair QL, the Atari ST and Falcon, the Atari Jaguar, the Sega Genesis (Mega Drive) and Sega CD, the Philips CD-i, the Capcom System I (Arcade), the AT&T UNIX PC, the Tandy Model 16/16B/6000, the Sun Microsystems Sun-1, Sun-2 and Sun-3, the NeXT Computer, NeXTcube, NeXTstation, and NeXTcube Turbo, early Silicon Graphics IRIS workstations, the Aesthedes, computers from MASSCOMP, the Texas Instruments TI-89/TI-92 calculators, the Palm Pilot (all models running Palm OS 4.x or earlier), the Control Data Corporation CDCNET Device Interface, the VTech Precomputer Unlimited and the Space Shuttle. Although no modern desktop computers are based on processors in the 680x0 series, derivative processors are still widely used in embedded systems.

Motorola ceased development of the 680x0 series architecture in 1994, replacing it with the PowerPC RISC architecture, which was developed in conjunction with IBM and Apple Computer as part of the AIM alliance.

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