MC68012 The Compatible Processors The MC68000 The first of the Motorola VLSI family of microprocessors, the 16-bit MC68000 combines state-of-the-art technology, advanced circuit design and computer science to achieve the following user- significant features: 32-bit-Data and Address Registers 16 Megabyte Direct Addressing Range 56 Powerful Instruction Types Operations on Five Main Data Types Memory Mapped I/O 14 Addressing Modes The MC68010 An M68000 Family member with enhancements that make it ideal for virtual memory and virtual machine systems. Its most significant enhancement is the facility for complete, controlled storing of the internal processor state upon receipt of a bus error signal during a faulty bus cycle. Additionally, the MC68010 may be used as a virtual processor with one governing operating system han- dling the supervisory chores of any number of sub- ordinate operating systems. The MC68012 Maintains all the features, functions, and upward compatability of the MC68008, MC68000 and MC68010 and adds seven more address lines allowing for a 2-gigabyte linear address range. he Microprocessors MC68020 MC6888 1 The MC68020 The first complete 32-bit micropro- cessor whose processing power rivals that of todays more advanced minicomputers and even those of many mainframe machines, while maintaining soft- ware compatibility to all preceding M68000 MPUs. The MC68020 features instruction-set enhance- ments, co-processor operation, improved operating system support and innovative techniques to improve bus efficiency. HCMOS manufacturing techniques al- low the MC68020 to provide all these features and power while dissipating less than 1.5 watts in a sys- tem. The MC68008 For 8-Bit Applications Aliows the design of cost-effective systems using 8-bit data buses while providing the benefits of 32-bit internal architecture. Performance rivaling that of many 16-bit machines is made possible by (up to) 10 MHz pro- cessing speed and other attributes associated with the MC68000 processor. System cost, however, is significantly reduced through the use of byte-wide memories and peripherais as well as the lower cost of the less demanding architecture of the 8-bit output requirements. The MC68881 Floating Point Coprocessor Pro- vides full support for IEEE specified floating point high-level math functions and for all transcendental functions. All calculations are performed to 80 bits of precision and no software envelope is required. The FPCP can perform either as a coprocessor to the full 32-bit MC68020 microprocessor or as a tightly cou- pled peripheral to the MC68000 or MC68010. MOTOROLA EUROPEAN MASTER SELECTION GUIDE 1-5 MC68008