This guide provides a comprehensive technical overview and programming reference for the Intel 80386 and 80486 microprocessors. It details the architecture, instruction set, and specific features of these processors, including the 80387 numeric coprocessor. The book aims to equip programmers with the knowledge needed to effectively utilize these advanced processors through detailed documentation and practical advice.

This technical guide is likely regarded as a valuable resource for assembly language programmers and system architects working with the 80386 and 80486 processors. Its detailed instruction set documentation and practical programming advice, stemming from the author's direct involvement in the 80386 development, suggest it would be a go-to reference for understanding the intricacies of these chips. The inclusion of information on the 80386SX and 80486 indicates its relevance for those transitioning to or working with these later iterations.