Download Disk Basic Unravelled II

TABLE OF CONTENTS
1
FOREWORD……………………………………………………………………………………………………1
2
INTRODUCTION…………………………………………………………………………………………3
3
HOW TO USE THIS BOOK……………………………………………………………………4
4
DESCRIPTION OF DISK BASIC………………………………………………………5
FILE CONTROL BLOCK STRUCTURE………………………………………………6
FILE ALLOCATION TABLE…………………………………………………………………9
THE DIRECTORY………………………………………………………………………………………11
1793 FLOPPY DISK CONTROLLER DESCRIPTION…………………13
MACHINE LANGUAGE FILE INPUT/OUTPUT………………………………17
DISK BASIC RAM VARIABLES/BUFFERS……………………………………18
APPENDICES
A
MEMORY MAP
B
DISASSEMBLY OF DISK BASIC 1.1
C
DISASSEMBLY OF DISK BASIC 1.0
D
DISK BASIC SYMBOL TABLE – 1.1
E
DISK BASIC SYMBOL TABLE – 1.0
F
DISK BASIC ROUTINES AND ENTRY POINTS
G
DISK BASIC’S DATA/ASCII TABLES
H
DISK BASIC ERROR ENTRY POINTS
I
ASCII CHART