Commodore 1541-II Betriebsanweisung Seite 4
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PART TWO: GUIDE
TO
ADVANCED OPERATION
AND
PROGRAMMING
Chapter 4: Commands
•.•••••••••.•..•..••••••••••••••.•••.•••••••••••••
25
Command Channel
••.......••.••••••••••.•••••.•..•••••••••••..
25
Reading the
Error
Channel
•.•..••.••••••••.•••••••••..••••.•.•••
26
Housekeeping hints
••.•••.••••••.••.•.....••.•••.....••••••.....
28
Saving programs
•..•.....••.......•..••••••..•.....•••.....•...
29
Save with replace
•••••..••...••••
,.
....••..•.•..•...•..•....•.•.
30
Verifying programs
.....•..••....•..•...•..•...•..•.......•.•..
30
Erasing programs
•...•.......••.••••.•.....•.•••••....•........
31
Scratch for advanced users
•••...•.••••........•....•..•..•..•.•.
33
Renaming programs
••.••••.•......................•.•••.••.....
34
Renaming
and
scratching troublesome programs
.......•.•••.•.....
36
Copying programs
•••••....••..•..•...•••..•....•.............•
37
Validating the d.iskette
••..••....•.•••.•...•.....•...•..•••..•..•
38
Initializing
•••...•.•....•.•..•....•.•••..•..•...•.•....••.•••••
40
Chapter
5: Sequential Data Files
..•.•••........•.......•••...•..•.••..•..
42
The concept
of
files
•......•...•..........•..••••....
.,
.•••.......
42
Opening a sequential
file
•.•..•...•.......•.•..•...•.••••••.••...
42
Adding to a sequential
file
.....•........••••..•.•....••.......•..
45
Writing
file
dala:
Print#
..••.••.•..•....•••..•...••..•..•..•..•.
46
Closing a
file
......••.........••..•...•.........••..•..•....•
•. 48
Reading
file
data
using
INPUT#
.•..•••••.....••••••..•..•.......
49
More about INPUT (advanced)
.•••••••.••.....••......•..•......
50
Numeric Data Storage on Diskette
•..•.••••••..••.••.••••••••..•.•
51
Reading
File Data: Using
GET#
....••.•...••..•..•....•..•...•••.
52
Demonstration
of
Sequential Files
•••••.•.•.....••••••••..•.•••...
54
Chapter
6: Relative Data Files
.•.•.....••••...•......•.....•.••.••.......
55
The value of relative access
••..•..•......••.•.......••.•..•.•.••.
55
Files, Records,
and
Fields
.....•..•.............•...•.........•..
55
File limits
•.•••.•........•...•....•...•...•....•...•..•••......
56
Creating a relative
file
..•.•.••......•..••••..........••.........
56
Using relative files:
Record#
..........•.•..•.....•...•...•..••••.
57
Completing relative
file
creation
....•...••.•...••.............•••.
59
Expanding a relative
file
.•.....•......•••••....••.•••.•....•....
60
Writing relative
file
data
.••••.....•.•...••.....•...•.••.........
61
Designing a relative record
.•..•.•.•........••.•......••....•••••
61
Writing the record
....••••••...•....•........••.•••.....•..•..•
62
Reading a relative record
..•...............•....................
63
The v!llue
of
index
files
.•.•••.•
,.
.•..•..••...•.•................••
64
Chapter 7: Direct Access Commands
.••.•••..•••...•....•..•..•.•..
•
...••.
65
A tool for advanced users
.••.......•••........•..••••........••.
65
Diskette organization
..•.•......•..•.••••..•....•..•.••...•.....
65
Opening a
data
channel
••.••.•..••.•..••..••..................•.
65
Block-Read
•..••...•...•.••••......•.....••.•.......•....•....
66
Block-Write
•••.•.......•••••....•......•..•••.••.........•
.
•..
67
The original commands
....••.•••..........•..•......•.....
•
....
68
The buffer pointer
......•......•...•..
. •
..•.........••....•..•..
69
AllOC:ating
blocks
•....••...••......•••.••..............•..••....
70
Freeing blocks
•.....•..•..•..•.......•..•..•...•.......
•
..••...
71
Using random
files
(advanced)
.•......••••.•.•........•..••..•...
72
Chapter
8: Internal Disk
Commands.........
.
..........................
73
1541 Memory Map
•..••.............•••...........•....•..•..
: :
73
Memory Read
•..............•...•..•..•..•••...•......•.....••
74
Memory Write
..•.•...•••..•••...•.....•...•....•............
.
15
Memory Execute
•••..•....•...•.••.....•............•..•.....••
77
Block Execute
.•..••..•.•.....•..•...•••..•......•..........•..
77
User commands
.........•.................••....•............•.
78
Chapter
9:
Machine Language Programs
..................................
80
Disk-related kernal subroutines
...................•....••........
80
Appendices
A. Changing the Device Number
....••................••....•....
81
B.
Error
Messages
.••......••.....•.•..•..•...•...•..•......•..
83
C. Diskette Formats
....••...••..........•..•......
.
...•........
87
D. Disk Command Quick Reference Chart
••..••....•..•.....••...
92
E. Test/Demo Diskette • • . • . • • . . • . . • . . . • . . • . . . •
93
·················
List
of
Figures
1. Front Panel
..•.••..••••..•••..•.•...••.•.••..•..........•...
5
2. Back Panel 6
3. Floppy Disk.
H~~k~~.
: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 8
4. Position for Diskette Insertion
.................................
12
- COMMODORE 1
- USER'S 2
- CONTENTS 3
- ················· 4
- INTRODUCTION 5
- I store 6
- I pack the disk 6
- GUIDE TO OPERATION 7
- CONNECTING THE CABLES 8
- TURNING ON THE POWER 8
- TROUBLESHOOTING GUIDE 10
- SIMPLE MAINTENANCE TIPS 10
- CHAYfER2 11
- DISKETIES 11
- CHAPTER3 14
- DIRECTORIES 14
- = Program files 15
- = Relative data files 15
- P = Program 16
- PART TWO: 17
- GUIDE TO 17
- ADVANCED OPERATION 17
- PROGRAMMING 17
- In Basic 18
- I will 19
- VERIFYING PROGRAMS 20
- SCRATCH·(FOR ADVANCED USERS) 21
- "<" 22
- ORIGIN~L 23
- Chapt~r 24
- 0 on the 25
- 0 and device 8 respectively 25
- #" 26
- I AND PH 27
- ~orrect 28
- ~~an:ple 29
- Troublesome Characters 30
- & number 32
- I and 127· 33
- (>) 34
- = NR-256*RH 35
- & STATE" ;CS$ 36
- ORGANIZ~ 37
- BLOCK-READ 38
- BLOCK-WRITE 38
- PRINT#l5 39
- WRITE";channel 39
- ALLOCATING BLOCKS 40
- FREEING 40
- CHAPTERS 41
- INTERNAL DISK COMMANDS 41
- : PRINT ASC(A$); 42
- 'Nbcre 43
- :" 44
- + 32)CHR$(DV + 64) 45
- Of'F 46
- ~overed 47
- '"' 48
- I - available block 49
- & C-64 51
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