Índice: Introduction to the Motorola Microprocessors and Controllers *Microcomputer and Microprocessor Characteristics *Representation of Numbers and Characters *Introduction to the M68000 Family *MC68000 Assembly Language and Basic Instructions *Data Transfer, Program Control and Subroutines *Arithmetic Operations *Logical and Bit Operations *Programming Techniques *System Operation *Exception Processing *Interfacing and I/O Programming *System Design and Hardware Considerations Appendix I: ASCII Character Set and Powers of Two and Sixteen Appendix II: MC68000 Characteristics Appendix III: Assembly Language Set Appendix IV: Machine Language Characteristics of the MC68000, MC68008 and MC68010 Appendix V: Comparison of 68000 Family Processors Answers to Selected Exercises Index.

Microprocessors and Microcomputer-Based System Design, Second Edition, builds on the concepts of the first edition. It discusses the basics of microprocessors, various 32-bit microprocessors, the 8085 microprocessor, the fundamentals of peripheral interfacing, and Intel and Motorola microprocessors. This edition includes new topics such as floating-point arithmetic, Program Array Logic, and flash memories. It covers the popular Intel 80486/80960 and Motorola 68040 as well as the Pentium and PowerPC microprocessors. The final chapter presents system design concepts, applying the design principles covered in previous chapters to sample problems.

The Motorola MC68000 family of microprocessors is undoubtedly a revolu tionary set of devices. The MC68000 is the first advanced 16-bit microprocessor with a 32-bit internal architecture and the first with 16-megabyte, nonsegment ed, direct memory addressing. The processor's six basic addressing modes are equivalent to 14, when one considers all of the variations among these modes. Combined with the device's data and instruction types, the modes provide more than 1000 useful instructions. The book you are about to study has been developed as an aid to the hard ware designer and as a supplement to the Motorola seminars on the 68000 microprocessor. The text includes a detailed description of the MC68000 and two complete systems that show how this processor can be interfaced to the outside world. The book follows a "top-down" approach. A brief history of microprocessors is provided first. Chapter 2 details the MC68000 by describing its registers, control lines, and capabilities. Chapter 3 introduces a small MC68000-based system. Although this system is characterized in the book as hypothetical, it is indeed the Educational Computer Board, used in the various Motorola seminars. The addressing modes and instructions are explained in Chapter 4, which includes helpful hints on how instructions can be used. Chapter 5 provides an in-depth description of additional instructions and numerous examples. Chapter 6 discusses exception handling and interrupts.