TABLE OF CONTENTS

          INTRODUCTION .................................. 1.1
          TECHNICAL SPECIFICATIONS ...................... 1.2
          
          CHAPTER 1
                Installation instructions ............... 1.1

          CHAPTER 2
                Operating Instructions .................. 2.1
                Care of diskettes ....................... 2.2
                Disk Drive Terminology .................. 2.3
                Frequently Used Commands
                  LOAD .................................. 2.5
                  SAVE .................................. 2.8
                  VERIFY ................................ 2.9
                Utility Commands
                  OPEN .................................. 2.9
                  PRINT# ................................ 2.10
                  INITIALIZE ............................ 2.11
                  NEW ................................... 2.11
                  SCRATCH ............................... 2.12
                  COPY .................................. 2.12
                  RENAME ................................ 2.13
                  VALIDATE .............................. 2.13
                  CLOSE ................................. 2.14
                  DUPLICATE (SD-2 ONLY) ................. 2.14

          CHAPTER 3
                File Data Handling ...................... 3.1
                Sequential Files ........................ 3.1
                    OPEN ................................ 3.1
                    PRINT# .............................. 3.2
                    GET# ................................ 3.3
                    INPUT# .............................. 3.4
                Random Files ............................ 3.5
                    OPEN ................................ 3.6
                    BLOCK-READ .......................... 3.6
                    BLOCK-WRITE ......................... 3.7
                    BLOCK-ALLOCATE ...................... 3.7
                    BLOCK-FREE .......................... 3.8
                    BUFFER-POINTER ...................... 3.8
                    USER1 ............................... 3.9
                    USER2 ............................... 3.9
                Relative Files .......................... 3.10
                    OPEN ................................ 3.11
                    PRINT ............................... 3.11

          CHAPTER 4
                Programming the Disk Controller ......... 4.1
                    MEMORY-WRITE ........................ 4.2
                    MEMORY-READ ......................... 4.2
                    MEMORY-EXECUTE ...................... 4.3
                    BLOCK-EXECUTE ....................... 4.3
                    USER ................................ 4.3

          CHAPTER 5
                Changing the Disk Drive Device Number ... 5.1
                Hardware Method ......................... 5.1
                Software Method ......................... 5.2

          APPENDICES
                Appendix A. Disk Command summary ........ A.1
                Appendix B. Error Messages .............. B-1
                Appendix C. BASIC 4.9 Commands .......... C.1

          SD1 / SD2 WARNINGS (FCC REGULATIONS)

          WARRANTIES