The Atari BASIC SOURCE BOOK

From the back The creators of Atari BASIC have now revealed their own work. Even if you aren't a machine language programmer, you'll find this book a fascinating exploration of a computer language. Now you can understand exactly why your programs work as they do. And if you are a machine language user, the source listing will let you see exactly where to enter Atari BASIC to use the powerful routines built into the language.