Commodore 2040 User Manual page 5

Chapter 7
Chapter 8
Chapter 9
Chapter 10
Ending The Program . . . . . . . . . . . . . . . . . . .. 69
Relative Files 4040, 8050 . . . . . . . . . . . . . . . . . . . . . . .. 69
Creating A Relative File .. . . . . . . . . . . . . . . . . . . . . . .. 72
Expanding A Relative File 72
Accessing A Relative File . . . . . . . . . . . . . . . . . . . . . . .. 73
Simplifying The Use of Commodore Disk-Related Commands. . . . . . .. 77
Loading The DOS Support Program . . . . . . . . . . . . . . . . . . . . . . .. 77
Using The DOS Support Symbols:
>
and
@ . . • • . • • . • . • . • • . • .•
78
Loading A Program With The 1 . . . . . . . . . . . . . . . . . . . . . . . . . . ..
78
Loading And Running A Program With Up Arrow .. . . . . . . . . . .. 79
Special DOS Support Information 79
Error Messages - Pattern Matching File Names - Disk Commands. . . .. 81
Requesting Error Messages: Commodore Disk Drives. . . . . . . . . .. 81
Summary Of CBM Floppy Error Messages 82
Description of DOS Error Messages 82
Pattern Matching 85
User's Quick Reference: Disk Commands. . . . . . . . . . . . . . . . . . .. 86
Random 1.00 Program Listing 89
Index , . . . . . . . . . . . . . . . .. 95
List of Illustrations
Figure Title Page
1 Models 2040, 3040, 4040, 8050: Rear View 5
2 Floppy Disk Hookup 12
3 Position For Diskette Insertion 13
4 2040,3040,4040 Format: Expanded View of A Single Sector 62
5 8050 Format: Expanded View of A Single Sector 63
List of Tables
Table Title Page
1 Suggested Reading List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Specifications: Model 8050 Dual Drive Floppy Disk 6
3
Specifications: Models 2040/3040 Dual Drive Floppy Disk. . . . . . . . . .
7
4 Specifications: Model 4040 Dual Drive Floppy Disk 8
5 Standard Jump Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 53
6 Block Distribution By Track 54
7 2040,3040 BAM Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 55
8 2040,3040 Directory Header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 55
9 4040 BAM Format. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .. 56
10 4040 Directory Header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 56
11 8050 Directory Header Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 57
12 8050 BAM Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 58
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