6809 Assembly Language Programming

Introductory Material
	Acknowledgements
	About the Author
	Contents
	Program Examples
i. Fundamental Concepts
	1. Introduction to Assembly Language Programming
		A Computer Program
		High-Level Languages
	2. Assemblers
		Features of Assemblers
		Types of Assemblers
		Errors
		Loaders
	3. 6809 Machine Structure and Assembly Language
		6809 Registers and Flags
		6809 Addressing Modes
		Modes Which Do Not Specify Memory Locations
		Memory Addressing Modes
		Indexed Memory Addressing Modes
		Program Relative Addressing for Branches
		6809 Instruction Set
		6800/6809 Compatibility
		6801/6809 Compatibility
		6502/6809 Compatibility
		Motorola 6809 Assembler Conventions
ii. Introductory Problems
	4. Beginning Programs
		Program Examples
		Problems
	5. Simple Program Loops
		Program Examples
		Problems
	6. Character-Coded Data
		Handling Data in ASCII
		Program Examples
		Problems
	7. Code Conversion
		Program Examples
		Problems
	8. Arithmetic Problems
		Program Examples
		Problems
	9. Tables and Lists
		Program Examples
		Problems
iii. Advanced Topics
	10. Subroutines
		Program Examples
		Position-Independent Code
		Nested Subroutines
		Problems
	11. Parameter Passing Techniques
		The PSH and PUL Instructions
		General Parameter Passing Techniques
		Types of Parameters
	12. Input/Output Considerations
		I/O Device Categories
		Time Intervals
		Logical and Physical Devices
		Standard Interfaces
		6809 Input/Output Chips
	13. Using the 6820 Peripheral Interface Adapter (PIA)
		Initializing a PIA
		Using the PIA to Transfer Data
		Program Examples
		More Complex I/O Devices
		Problems
	14. Using the 6850 Asynchronous Communications Interface Adapter (ACIA)
		Program Examples
	15. Interrupts
		Characteristics of Interrupt Systems
		6809 Interrupt System
		6820 PIA Interrupts
		6850 ACIA Interrupts
		6809 Polling Interrupt Systems
		6809 Vectored Interrupt Systems
		Communications Between Main Program and Service Routines
		Enabling and Disabling Interrupts
		Changing Values in the Stack
		Interrupt Overhead
		Program Examples
		More General Service Routines
		Problems
iv. Software Development
	16. Problem Definition
		Inputs
		Outputs
		Processing Section
		Error Handling
		Human Factors/Operator Interaction
		Examples
		Review
	17. Program Design
		Basic Principles
		Flowcharting
		Modular Programming
		Structured Programming
		Top-Down Design
		Designing Data Structures
		Review of Problem Definition and Program Design
	18. Documentation
		Self-Documenting Programs
		Comments
		Flowcharts as Documentation
		Structured Programs and Documentation
		Memory Maps
		Parameter and Definition Lists
		Library Routines
		Total Documentation
	19. Debugging
		Simple Debugging Tools
		Advanced Debugging Tools
		Debugging With Checklists
		Looking for Errors
		Examples
	20. Testing
		Selecting Test Data
		Examples
		Rules for Testing
		Conclusions
	21. Maintenance and Redesign
		Saving Memory
		Saving Execution Time
		Major Reorganization
v. 6809 Instruction Set
	22. The Instruction Set
Appendices
	A. Summary of the 6809 Instruction Set
	B. Summary of the 6809 Indexed and Indirect Addressing Modes
	C. 6809 Instruction Codes, Memory Requirements, and Execution Times
	D. 6809 Instruction Object Codes in Numerical Order
	E. 6809 Post Bytes in Numerical Order
Index