6502 Assembly Language Programming

Description

Assembly language programming is the key to writing faster, more sophisticated programs that tap the full power of your microcomputer. This dynamic guide shows you how to put the powerandefficiency of this programming tool—previously available only to professionals—to work for you. The formatis self-paced and self-instructional, and the crystalclear coverage is equally applicable to Apple®, Atari®, and Commodore microcomputers—in fact to any machine based on the 6502 microprocessorchip. From a discussion of the characteristics and features of 6502 Assembly Language,the authors take you step by step through the entire set of assembly language instructions. You'll get hundreds of opportunities to practice coding typical routines and to check and correct your errors. You'll master techniques for handling routine operations, conditional commands, assembly language logic, subroutines, numeric manipulation, and more. Scores of sample programs demonstrate how the instructions are used in practice. Abundant summaries and self-tests reinforce the material every step of the way. And, because the book requires only minimal knowledge of programming, even computer novices can easily add the fundamentals of assembly language to their repertoire. How To Use This Book vii Chapter Introduction Chapter Number Systems and Data Representation 19 Chapter Instruction Format 47 Chapter Operand Formats 61 Chapter Elementary Instruction Set 83 Chapter Assembler Directives 107 Chapter Conditional Instructions 141 Chapter 8 Logical Operations 173 Chapter 9 The Stack 193 Chapter 10 Subroutines 203 Chapter 11 Numeric Manipulation 231 Chapter 12 Additional Instructions 263 Appendix A 269 Appendix B 270 Appendix C 272 Appendix D 274 Index 275