This text is intended for microprocessor courses at the undergraduate level in technology, engineering, and computer science. Now in its third edition, it provides a comprehensive treatment of the microprocessor, covering both hardware and software based on the Z80 microprocessor family.This edition preserves the focus of the earlier editions and includes the following changes: * Chapters have been revised to include the most recent technological changes in 32- and 64-bit microprocessors and 8-bit microcontrollers. * Several illustrative programs have been added throughout the text. * Complete data sheets for the LM 135 temperature sensor and LCD panel, and a complete list of Z80 instructions with machine cycles, T-states, and flags are included in the Appendixes. * Appendix G, which contains answers to selected questions, has been added.