From back cover:Now That You Know APPLE ASSEMBLY LANGUAGE: What Can You Do With It?Here is an easy-to-understand collection of programs to help you unlock the power and speed of assembly language programming on your Apple II computer. You've spent a great deal of time learning the various assembly language commands, what they do and how. Now you can put these commands together to produce fast, powerful programs that let you greatly expand the capabilities of your computer.You'll find out how you can let your Apple do things it couldn't do before! With this book you'll discover how to:• Hold two Applesoft BASIC programs in memory simultaneously and switch between them at will, even under program control.• Reverse the way text is displayed on a video monitor to show black characters on a white background.• Add new commands to Applesoft BASIC so that it will be more powerful and easier to use.• Convert a section of the normal keyboard into a numeric keypad for super-fast entry of numerical data.• Use a custom-developed form of shorthand that automatically types out one or more BASIC commands when you press just one or two keys.• Permit older versions of the Apple computer to recognize lowercase letters, even in BASIC programs.•Restore Applesoft programs that have been accidentally erased.All this and much more is possible with the machine language programs described and listed here. And it's all done exclusively with software, no additional hardware or peripheral devices are required.If you're worried about getting confused and not understanding the operation of these powerful programs, don't. All 55 programs in this book are fully documented with detailed descriptions in the text of how and why the programs work, and line-by- line descriptions of each step in every assembly language program listed.You will find this to be an invaluable source-book of ideas, techniques and routines that can be incorporated into your own programs.ABOUT THE AUTHORJules H. Gilder is a pioneer in the use of personal computers. He was one of a handful of people to purchase and use the original Apple I computer, on which he taught himself 6502 assembly language programming. Since then he has taught hundreds of people both BASIC and assembly language programming in courses at New York University and private seminars. He has been editor-in-chief of Personal Computing magazine, vice president of software for Children's Television Workshop and editorial director of Hayden Software. He is the author of seven other books covering integrated software, and science and engineering programs in Pascal and BASIC for the Apple and IBM PC computers.DataCraft, Inc. 1985