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TABLE OF CONTENTS 
.SP3
CHAPTER 1
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INTRODUCTION
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CHAPTER 2
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THE EVOLUTION OF DOS
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DOS 3
DOS 3.1
DOS 3.2
DOS 3.2.1
DOS 3.3
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CHAPTER 3
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THE DISK II HARDWARE AND TRACK FORMATTING
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DISK ORGANIZATION
TRACK FORMATTING
DATA FIELD ENCODING
SECTOR INTERLEAVING
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CHAPTER 4
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DISKETTE DATA FORMATS
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DISKETTE SPACE ALLOCATION
THE VTOC
THE CATALOG
THE TRACK/SECTOR LIST
TEXT FILES
BINARY FILES
APPLESOFT AND INTEGER FILES
OTHER FILE TYPES (S,R,A,B)
EMERGENCY REPAIRS
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CHAPTER 5
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THE STRUCTURE OF DOS
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DOS MEMORY USE
THE DOS VECTORS IN PAGE 3
WHAT HAPPENS DURING BOOTING
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CHAPTER 6
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USING DOS FROM ASSEMBLY LANGUAGE
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DIRECT USE OF DISK DRIVE
CALLING READ/WRITE TRACK/SECTOR (RWTS)
RWTS IOB BY CALL TYPE
CALLING THE DOS FILE MANAGER
FILE MANAGER PARAMETER LIST BY CALL TYPE
THE FILE MANAGER WORKAREA
COMMON ALGORITHMS
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CHAPTER 7
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CUSTOMIZING DOS
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SLAVE VS MASTER PATCHING
AVOIDING RELOAD OF LANGUAGE CARD
INSERTING A PROGRAM BETWEEN DOS AND ITS BUFFERS
BRUN OR EXEC A HELLO FILE
REMOVING THE PAUSE DURING A LONG CATALOG
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CHAPTER 8
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DOS PROGRAM LOGIC
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DISK II CONTROLLER CARD ROM - BOOT 0
FIRST RAM BOOT STRAP LOADER - BOOT 1
DOS 3.3 MAIN ROUTINES
DOS FILE MANAGER
READ/WRITE TRACK/SECTOR
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APPENDIX A
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EXAMPLE PROGRAMS
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HOW TO USE THE PROGRAMS
DUMP - TRACK DUMP PROGRAM
ZAP  - DISK UPDATE PROGRAM
FTS  - FIND TRACK/SECTOR LISTS PROGRAM
COPY - BINARY TO TEXT FILE CONVERT PROGRAM
INIT - REFORMAT A SINGLE DISK TRACK
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APPENDIX B
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DISK PROTECTION SCHEMES
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APPENDIX C
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GLOSSARY
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INDEX
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