Apple II: DOS Programmer's Manual
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Apple II DOS Programmer's Manual is written for people who want to store programs and other information on disks. It describes DOS 3.3, a disk operating system that allows you to place information on disks, change information already on disks, and retrieve information from disks. DOS runs on Apple II, Apple II Plus, and Apple lie computers.
The DOS User’s Manual can be used as an introduction to this manual. However, the DOS Programmer’s Manual summarizes the information it contains.
Organization of This Manual
This manual is designed as a reference. The topics covered become increasingly complex as you progress.
Each chapter begins with an introduction to the topics it contains and concludes with a summary of the commands that are discussed.
Chapter 1 describes the DOS environment and the DOS commands that are used primarily from the keyboard.
Chapter 2 explains several ways of using DOS commands. It describes how to embed a DOS command in a program, monitor the processing, and intercept errors.
Chapter 3 tells you about disk access for text files and compares sequential and random access. It explains how to write sequential- access text programs.
Chapter 4 explains random-access files and how to write programs that use them.
Chapter 5 tells you how to use DOS to write a program that runs other programs, how to chain programs, and how to create a turnkey program.
Chapter 6 describes binary files and commands. It also discusses the relation between DOS and the Monitor program.
Appendix A describes how to run a program on a 13-sector disk and how to convert 13-sector disks to 16-sector format. Appendix B explains disk storage: how tracks and sectors are mapped and used by DOS, and how machine-language
programmers can directly address tracks and sectors.
Appendix C discusses DOS error messages. It lists each message and suggests ways to fix the problem.
Appendix D describes each program on the SYSTEM MASTER and the SAMPLE PROGRAMS disks.
Appendix E is a summary of the DOS commands.
The glossary explains some of the terms that are used in this manual.
A tear-out reference card inside the back cover lists all the DOS commands.
Platform: Apple For II, II+, IIe with 48Kb RAM Disk 5.25 drive
OS: DOS 3.3
System Software (SS:) DOS 3.3
Version: 3.3 1982
This exhibit has a reference ID of CH1742. Please quote this reference ID in any communication with the Centre for Computing History.