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Commodore Manuals
Floppy Disk Drive
1551
User manual
Commodore 1551 User Manual
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Introduction
Advantages of a Disk Drive
Features of the 1551
How to Use this Book
Chapter 1: Disk Drive
Figure 1: Front Panel
Part One: Guide to Operation
Unpacking
Connecting the Cables
Figure 2: Back Panel
Turning on the Power
Troubleshooting Guide
Simple Maintenance Tips
Chapter 2: Diskettes
What Is a Diskette
Figure 4: Position for Diskette Insertion
Safety Rules for Diskette Care
Using Packaged Programs
How to Prepare a New Diskette
Organizing a Diskette Library
Backups
What Is a Directory
Viewing a Directory
What a Directory Shows
Chapter 3: Operation
The Command Channel
Error Checking
Error Check Subroutine
BASIC Housekeeping Hints
More about Directories
Selective Directories
Printing a Directory
Pattern Matching and Wild Cards
Splat Files
Verify
Copy
Scratch
Rename
Renaming and Scratching Troublesome Files (Advanced Users)
Initialize
Chapter 4 Sequential Data Files
The Concept of Files
Opening a File
Adding to a Sequential File
Writing File Data: Print
Closing a File When You Are Done Using It
Reading File Data: Input
More about Input # (Advanced Users)
Numeric Data Storage on Diskettes
Reading File Data: Get
Part Two: Guide to Advanced Operation and Programming
Chapter 5: Relative Files
The Value of Relative Access
Files, Records, and Fields
File Limits
Creating a Relative File
Using Relative Files: Record# Command
Completing Relative File Creation
Expanding a Relative File
Writing Relative File Data
Designing a Relative Record
Writing the Record
Reading a Relative Record
The Value of Index Files (Advanced Users)
Chapter 6: Direct Access Commands
A Tool for Advanced Users
Diskette Organization
Opening a Data Channel for Direct Access
Block-Read
Block-Write
The Original Block-Read and Block-Write Commands
The Buffer Pointer
Allocating Blocks
Freeing Blocks
Using Random Files (Advanced Users)
Chapter 7: Internal Disk Commands
1551 Memory Map
Memory-Read
Memory-Write
Memory-Execute
Block-Execute
User Commands
Chapter 8: Machine Language Programs
Disk-Related Kernal Subroutines
Appendices
A: Changing the Device Number
B: DOS Error Messages and Likely Causes
C: Diskette Formats
D: Disk Command Quick Reference
E: Test/Demo Diskette
F: Specifications of the 1551 Disk Drive
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