PREFACE / vii

LAB 1 ENTERING AND EXECUTING A PROGRAM                                                                  1

·                     DISCUSSION: Boot Strap Program / 1

·                     MONITOR PROGRAM / 2

·                     MNEMONICS / 2

·                     OPERATION CODE / 3

·                     6800 ARCHITECTURE / 4

·                     LAB PROCEDURE / 5

·                     QUESTIONS / 7

·                     EXERCISE / 7

LAB 2 DATA TRANSFER                                                                                                           9

·                     DISCUSSION: Data Transfer Instruction / 9

·                     ADDRESSING MODES / 10

·                     IMMEDIATE ADDRESSING / 10

·                     EXTENDED ADDRESSING / 11

·                     INDEXED ADDRESSING / 12

·                     LAB PROCEDURE / 12

·                     QUESTION / 15

·                     EXERCISE / 15

LAB 3 ARITHEMETIC INSTRUCTIONS                                                                                    17

·                     DISCUSSION: Numbers as Information / 17

·                     DEVELOPING A PROGRAM / 18

·                     Step 1: Define the Task / 18

·                     Step 2: Lay Out the Steps / 18

·                     ARITHEMATIC INSTRUCTIONS / 19

·                     LAB PROCEDURE / 24

·                     QUESTIONS / 29

·                     EXERCISE / 30

LAB 4 BRANCHING INSTRUCTIONS                                                                                       31

·                     DISCUSSION: Branching Instructions / 31

·                     LABLES / 33

·                     CONDITIONAL BRANCHING / 34

·                     LOOPS / 35

·                     LAB PROCEDURE / 36

·                     QUESTIONS / 39

·                     EXERCISE / 39

LAB 5 SUBROUTINES                                                                                                               41

·                     DISCUSSION: Subroutines / 41

·                     STACK / 42

·                     KEYBOARD SUBROUTINES / 44

·                     DISPLAY SUBROUTINES / 44

·                     LAB PROCEDURE / 44

·                     QUESTIONS / 47

·                     EXERCISE / 47

LAB 6 LOGIC, SHIFT AND ROTATE INSTRUCTIONS                                                             49

·                     DISCUSSION: Logic Instruction / 49

·                     ROTATE AND SHIFT INSTRUCTION / 51

·                     LAB PROCEDURES / 52

·                     QUESTIONS / 57

·                     EXERCISE / 58

LAB 7 INPUT/OUTPUT ADDRESSING                                                                                     59

·                     DISCUSSION: Bus Cycle / 59

·                     DEVICE SELECT PULSE / 60

·                     DECODING / 62

·                     OUTPUT / 64

·                     INPUT / 66

·                     LAB CIRCUIT / 67

·                     CIRCUIT OPERATION / 68

·                     LAB PROCEDURE / 69

·                     QUESTIONS / 71

·                     EXERCISE / 71

LAB 8 I/O COUNTER                                                                                                                73

·                     DISCUSSION: BCD Instruction / 73

·                     LAB PROCEDURES / 74

·                     QUESTIONS / 75

·                     EXERCISE / 75

LAB 9 INTERRUPTS                                                                                                                 77

·                     DISCUSSION: Vector Address / 77

·                     LAB PROCEDURE / 80

·                     QUESTIONS / 83

·                     EXERCISE / 83

LAB10 HARDWARE INTERRUPT 2                                                                                        85

·                     DISCUSSION: Interrupt-driven System / 85

·                     Program 10-1: / 86

·                     LAB PROCEDU