NEW BOOK FROM ADDISON-WESLEY DOCUMENTS PREVIOUSLY UNDOCUMENTED FEATURES OF
PC HARDWARE

February 23, 1994 -- Reading, Massachusetts--Addison-Wesley, publisher of
the popular books Undocumented DOS, Second Edition and Undocumented
Windows, today announced the publication of The Undocumented PC: A
Programmer's Guide to I/O, CPUs, and Fixed Memory Areas by Frank van
Gilluwe.

Knowing about the key hardware elements of a PC allows applications
programmers to dramatically speed up the execution time of their programs.
Until now, they have had to make do without access to a vast amount of
unreleased or deliberately buried information that would help them take
advantage of these elements.

The Undocumented PC reveals for the first time the undocumented or
difficult to find programming features of critical PC hardware including
Input/Output ports, the major chips in the Intel family, and fixed memory
areas. The book explains each major subsystem of the PC in detail,
followed by extensive reference sections that show and explain both
documented and undocumented BIOS functions. These are explained in far
greater detail than ever before, and cover all the major system
architectures including the PC, XT, AT, EISA, and MCA. Most chapters
include interesting programs (complete with source code) to demonstrate
how to access the functions described.

A value added disk includes diagnostic and analytical tools, equipment
detection routines, CPU detection routines, identification and testing
utilities, and demonstration utilities.

Frank van Gilluwe is President of V Communications, Inc., developers of DOS
and Windows programming tools, including the bestselling Sourcer
disassembler.

Addison-Wesley is a worldwide publishing company based in Reading,
Massachusetts, and is a recognized leader in the fields of trade computer,
computer science, engineering, mathematics, and physics.

The Undocumented PC has a suggested retail price of $44.95, is 915 pages,
paperback, and is available wherever computer books are sold.

Addison-Wesley Publishing Company
1 Jacob Way, Reading, MA 01867
617-944-3700

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