BACK COVER
"The value of this book...lies...in the
explanations...I expect to use this book often."
Bill Wilkinson, an author of Atari BASIC and COMPUTE! columnist
(from the introduction).

Now revised to include the XL and XE series, this memory
map and sourcebook was created to fill a need for a com-
plete, comprehensiveguide to the memory locations in
the Atari 400, 800, 1200XL, 600XL, 800XL, 65XE, and 130XE
personal computers. Although parts of this information are
available in other publications, no previos collection has
provided complete cross references, detailed explana-
tions, and a tutorial approach.

     This book serves as a doorway to understanding the
inner workings of the Atari for the beginning programmer,
as a tutorial for the intermediate, and as a reference work
for the advanced. One of the joys of computing is that the
beginner can become an intermediate, and the intermedi-
ate can become an expert with remarkable rapidity. This
book can be one of the most valuable tools to aid any
Atari programmer in making the transition to a new level
of competence.

     The wealth of information available to Atari owners in
technical manuals, recent books, and ongoing magazine
coverage has two significant drawbacks: It is not collected
in one handy reference and it is often difficult for the
beginner to understand. Many times you're expected to be
familiar with what's been printed elsewhere.

     Mapping The Atari, Revised Edition provides the most
detailed discussion yet offered on almost every known
memory location. For the first time, you can find explana-
tions--in a clear, understandable style--telling you how to
use all these memory locations.

     Mastering some of Atari's powerful, built-in capabili-
ties such as player/missile graphics and display lists re-
quires an understanding of how to manipulate specific
memory locations. This book shows you how.

     While advanced programmers will find this book an
indispensable resource manual, other, less experienced
programmers will turn to it again and again for clarifica-
tiom, instruction, advice, and as the definitive reference.