The 68000 Microprocessor

The 68000 Microprocessor

Designed to demystify the Motorola 68000 microprocessor—its hardware and software—this detailed reference leads users on an in-depth, hands-on exploration of more than 75 different applications and then guides them through the construction and programming of their own working single-board 68000 system. Chapter topics cover microprocessor-based systems, the 68000 microprocessor, software details of the 68000, exception processing, an introduction to data structures and programming the 68000, hardware details of the 68000, memory system design, I/O system design, advanced programming using 68000 peripherals, building a working 68000 system, an introduction to the advanced 680x0 series microprocessors, and microcontrollers. For programmers, and microcomputer/network technicians and engineers.

The 68000 Microprocessor

The 68000 Microprocessor

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.