Book excerpt: The book is written for an undergraduate course on the 16-bit, 32-bit and 64-bit Intel Processors. It provides comprehensive coverage of the hardware and software aspects of 8086/88, 80286, 80386, 80486 and Pentium Processors. The book uses plain and lucid language to explain each topic. The book provides the logical method of explaining the various complicated concepts and stepwise techniques for easy understanding, making the subject more interesting. The book begins with the 8086 architecture, instruction set, Assembly Language Programming (ALP) and interfacing 8086 with support chips, memory and I/O. It focuses on features, architecture, pin description, data types, addressing modes and newly supported instructions of 80286 and 80386 microprocessors. It discusses various operating modes supported by 80386 - Real Mode, Protected Mode and Virtual 8086 Mode. Finally, the book focuses on multitasking, exception handling, 80486 architecture, Pentium architecture and RISC processor. It describes Pentium superscalar architecture, pipelining, instruction pairing rules, instruction and data cache, floating-point unit, Pentium Pro architecture, Pentium MMX architecture, Hyper Treading Core2- Duo features and concept of RISC processor.