Assembly language programming for the 68000

✍ Scribed by Corwin, Edward; Logar, Antonette; Gill, Arthur

• Publisher: Prentice-Hall International
• Year: 1987
• Tongue: English
• Leaves: 260
• Category: Library

✦ Table of Contents

PREFACE vii

1 NUMBER SYSTEMS 1
1.1 Decimal-to-Binary Conversion, 1
1.2 Decimal-.to-Hexadecimal Conversion, 3
1.3 Binary-to-Decimal Conversion, 4
1.4 Hexadecimal-to-Decimal Conversion, 5
1.5 Hexadecimal-to-Binary Conversion, 6
1.6 Binary-to-Hexadecimal Conversion, 6
1.7 Binary and Hexadecimal Addition, 7
Exercises, 8

2 THE ORGANIZATION OF THE 68000 9
2.1 The Central Memory, 9
2.2 The Central Processor, 10
2.3 The Terminal and the Communication Chip, 12
2.4 The Line Clock, 14
Exercises, 14

3 REPRESENTA TlON OF NUMBERS AND CHARACTERS 15
3.1 2's Complement Representation, 15
3.2 Addition and Subtraction, 19
3.3 Character Representation, 20
3.4 Floating-Point Representation (Optional), 22
Exercises, 23

4 INSTRUCTIONS AND ADDRESSING MODES 25
4.1 The Execution Cycle, 25
4.2 Addressing Modes, 26
4.3 Single-Operand and Double-Operand Instructions, 32
4.4 No-Operand Instructions, 42
4.5 Machine Language, 42
4.6 On the Contents of a Computer Word, 45
Exercises, 46

5 ASSEMBL Y LANGUAGE PROGRAMMING 48
5.1 Assembly Language versus Machine Language, 48
5.2 Assembly Language Directives, 49
5.3 Assembly Language Program Format, 52
5.4 Example 1: Echo Keyboard Input to Screen, 53
5.5 Example 2: Multiple Echo, 56
5.6 Coding Hints, 58
Exercises, 61

6 STACKS AND SUBROUTINES 64
6.1 Stacks, 64
6.2 Example: Backward Echo, 66
6.3 Subroutines, 66
6.4 Subroutine Call and Return, 69
6.5 Argument Transmission, 70
6.6 Nested Subroutines, 75
6.7 Recursive Subroutines, 79
6.8 Example-Tower of Hanoi, 81
6.9 Coroutines, 86
Exercises, 87

7 ARITHMETIC OPERA TlONS 92
7.1 Carry and Overflow Under Addition, 92
7.2 Carry and Overflow Under Subtraction, 94
7.3 Double-Precision Arithmetic, 95
7.4 The TST and CMP Instructions, 97
7.5 More on Branch Instructions, 98
7.6 Shift Instructions, 103
7.7 Example: ASCII-to-Binary Conversion, 105
Exercises, 111

8 TRAPS AND INTERRUPTS 116
8.1 Traps, 116
8.2 Some Examples of Traps, 117
8.3 Program Traps, 119
8.4 Interrupts, 120
8.5 Why Use Interrupts?, 121
8.6 Priority Interrupts, 123
8.7 Timer Interrupts Using an MC68230 Parallel Interface and Timer (PI/T), 125
8.8 Example: Time Request, 126
Exercises, 130

9 ASSEMBLERS AND LINKAGE EDITORS 135
9.1 The Two-Pass Assembly Process, 135
9.2 Example of Assembler Listing, 138
9.3 Absolute and Relocatable Addresses, 138
9.4 The Linkage Editor, 140
9.5 Address Modification, 141
9.6 Global Symbols, 143
9.7 The Two-Pass Linkage Process, 143
9.8 Position-Independent Code, 145
Exercises, 146

10 ADVANCED ASSEMBL Y LANGUAGE TECHNIQUES 150
10.1 Macros, 150
10.2 Macro Definitions and Macro Calls, 152
10.3 Local Symbols, 158
10.4 Repeat Directives, 160
10.5 Conditional Assembly, 163
Exercises, 168

 Appendix A    68000 Organization      172
 Appendix B    ASCII Character Set     174
 Appendix C    68000 Addressing Modes        178
 Appendix D    68000 Instructions     180
 Appendix E    68000 Machine Language        215
 Appendix F    Notes on Programming Style       235
 Appendix G    Answers to Selected Exercises     238
 INDEX        245

✦ Subjects

Motorola 68000 (Microprocessor) -- Programming;Assembly languages (Electronic computers);Motorola 68000 (Microprocessor) -- Programming