The 68000 Microprocessor

1. Basic Concepts.- Brief History of Microprocessors.- Design of a Microprocessor.- Design Considerations.- Registers.- Addressing Modes.- Prefetch.- Multiple Arithmetic-Logic Unit.- Microprogramming.- Peripheral Devices.- Data Representation.- Terminology.- Data Types.- 2. Introduction to the MC68000.- General Layout.- Data Bus.- Address Bus.- Asynchronous Bus Control.- Function Control.- Synchronous Bus Control.- System Control.- Direct Memory Access Control.- Interrupt Control.- Registers.- Data Registers.- Address Registers.- Program Counter.- Status Register.- 3. A Small MC68000 System.- Block Diagram and Memory Map.- Block Diagram.- Memory Map.- Buses.- Address Multiplexing.- Reset/Halt and System Clock.- Reset/Halt Circuit.- System Clock.- Timing.- Bus Timeout Logic.- Design of Ram and Rom Interface.- ROM Circuit.- RAM Circuit.- 4. Addressing Modes; Instruction Set.- Addressing Modes.- Memory Accessing Rules.- Effective Address and Extension Word.- Register Direct Modes.- General.- Data Register Direct.- Address Register Direct.- Memory Address Modes.- General.- Address Register Indirect.- Address Register Indirect with Postincrement.- Address Register Indirect with Predecrement.- Address Register Indirect with Displacement.- Address Register Indirect with Index and Displacement.- Special Address Modes.- Absolute Short.- Absolute Long.- Immediate Mode.- Program Control Modes.- General.- Program Counter with Displacement.- Program Counter with Index.- Inherent Mode.- Summary.- Instructions.- 5. Instruction Set - A More Intensive Evaluation.- Data Manipulation Instructions.- Arithmetic Operations.- Logical and Shifting Instructions.- Logical Instructions.- Shifting Instructions.- Bit Manipulation Instructions.- Data Movement Instructions.- Program Control Instructions.- Unconditional Branch.- Conditional Branch.- Position Independence Instructions.- High-Level Language AIDS.- Programming Hints.- 6. Exception Handling.- General.- Interrupts.- 7. Peripheral Devices.- Memory Mapping of I/O Space.- MC6850 Acia.- Memory Mapping of ACIA.- Generating Interrupt Request Signals.- Parallel Interface/Timer.- Designing The Printer Interface.- Programming The Interface.- Design of the Cassette Interface.- Chapters 8. Another 68000-Based System.- Hardware Description.- The Operating System Monitor.- Monitor Commands.- The "b" Command: Set/Remove Breakpoints.- The "c" Command: Copy Memory Blocks.- The "d" Command: Display Data to Terminal.- The "e" Command: Enter Terminal Emulator Mode.- The "g" Command: Execute A User Program.- The "l" Command: Load Program From Host (S-Format).- The "m" Command: Examine/Modify Memory.- The "p" Command: Load/Execute a Prototype Command.- The "r" Command: Examine/Modify Registers.- The "s" Command: Single-Step Mode.- The "t" Command: Trace Program Execution.- Traps.- Exception Processing.- The Monitor.- Appendix A. S-Record Output Format.- Appendix B. Instruction Set Details.- Appendix C. Instruction Format Summary.- Appendix D. MC68000 Instruction Execution Times.- Appendix E. MC68000 Instruction Execution Times.