
Atari 130XE Machine Language for the Absolute Beginner
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Content
- Cover
- Contents
- Front Matter
- Title page
- Publisher info
- Foreword
- Atari 130XE Machine Language for the Absolute Beginner
- Chapter 1- Introduction to Machine Language
- Using a Machine Language Program
- Memory Addressing
- Using Memory Directly from BASIC
- Machine Language as a Subroutine
- Summary
- Chapter 2- Basics of Machine Language Programming
- Using Memory from Machine Language
- The Registers
- The Accumulator
- Addressing Modes
- Simple Program Input
- Assembly Language
- Screen Memory
- Printing a Message
- Summary
- Chapter 3- Introduction to Hexadecimal
- Uses of Hexadecimal
- Binary
- Why Hexadecimal
- Hex and Binary Mathematically
- Absolute Addressing
- Converting Hexadecimal to Decimal
- Summary
- Chapter 4- Introduction to ALPA + Disassembler
- To Get ALPA Running
- Using ALPA
- ALPA Commands
- Memory Usage in ALPA
- Summary
- Chapter 5- Microprocesor Equipment
- Storing Numbers
- The Carry Flag
- Adding Numbers
- Two Byte Addition
- Subtracting Numbers
- An Exercise
- Summary
- Chapter 6- Program Control
- Player-Missile Graphics
- Moving Player-Missile Graphics
- Looping Using JMP
- ALPA Label Name Addressing
- Infinite Loops
- Comparing Numbers
- Branch Instructions
- Zero Flag
- Program Summary
- Relative Addressing
- Summary
- Chapter 7- Counting, Looping and Pointing
- Counting to Control a Loop
- Counting Using the Accumulator
- Counting Using Memory
- The X and Y Registers
- Using the X Register as a Counter
- Moving Blocks of Memory
- Implied Addressing
- Relative Addressing
- Absolute Addressing
- Indexed Addressing
- Using the X Register as an Index
- Non-Symmetry of Commands
- Searching Through Memory
- Using More than One Index
- Zero Page Indexed Addressing
- Summary
- Chapter 8- Using Information Stored in Tables
- Displaying Characters as Graphics
- Graphics Memory
- Copying the Character Sets from ROM
- Indirect Indexed Addressing
- Register Transfer Instructions
- Indirect Addressing
- Summary
- Chapter 9- Processor Status Codes
- BCD Representation
- Summary
- Chapter 10- Logical Operators and Bit Manipulators
- Changing Bits Within Memory
- The Logical AND
- The Logical OR
- The Logical Exclusive OR
- The Bit Instruction
- Rotating Bits Within a Byte
- Rotation With Carry
- Rotating to the Right
- Clever Multiplication
- Summary
- Chapter 11- Details of Program Counter
- The Program Counter
- Storing into the Program Counter
- The Program Counter and Subroutines
- The Stack Control Structure
- Subroutines and the Stack
- The Stack and Interrupts
- Summary
- Chapter 12- Dealing with the Operating System
- The Kernal
- CLI (Clear Interrupt Flag)
- RTI (Return from Interrupt)
- Summary
- Back Matter
- Appendices
- Appendix 1- 6502 Instruction Codes
- Appendix 2- Hexadecimal to Decimal Conversion Table
- Appendix 3- Relative Brach and Two's Complement Numbering Tables
- Appendix 4- Atari 130XE Memory Map
- Appendix 5- The Screen Chip
- Appendix 6- The Sound Chip
- Appendix 7- Memory Usage Directory
- Appendix 8- Table of Screen Codes
- Appendix 9- Current Key Pressed
- Appendix 10- ALPA + Disassembler
- Also Available
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