| BAM FORMAT AND DIRECTORY HEADER |
|
TRACK 18 SECTOR 0 |
|
BYTE
|
CONTENTS
|
DESCRIPTION
|
|
0
|
18
|
Track pointer to first directory block |
|
1
|
1
|
Sector pointer to first directory block |
|
2
|
65
|
ASCII 'A' for format type |
|
3
|
128
|
1571 format Disk |
|
4
|
|
Number of sector available in Track 1 |
|
5
|
|
Track 1, sector 0-7 availability map * |
|
6
|
|
Track 1, sector 8-15 availability map * |
|
7
|
|
Track 1, sector 16-23 availability map * |
|
8
|
|
Number of sector available in Track 2 |
|
9
|
|
Track 2, sector 0-7 availability map * |
|
10
|
|
Track 2, sector 8-15 availability map * |
|
11
|
|
Track 2, sector 16-23 availability map * |
|
> > >
|
|
|
|
140
|
|
Number of sector available in Track 35 |
|
141
|
|
Track 35, sector 0-7 availability map * |
|
142
|
|
Track 35, sector 8-15 availability map * |
|
143
|
|
Track 35, sector 17-23 availability map
* |
|
144-159
|
|
Diskette name padded with spaces |
|
160-161
|
160
|
Shifted space [CHR$(160)] |
|
162-163
|
|
Diskette ID |
|
164
|
160
|
Shifted space [CHR$(160)] |
|
165
|
50
|
ASCII '2' for dos version |
|
166
|
65
|
ASCII 'A' for format type |
|
167-170
|
160
|
Shifted spaces [CHR$(160)] |
|
171-220
|
|
Not used |
|
221-237
|
|
Number of sector available on track 36 to
52 ** |
|
238
|
0
|
Track 53 is reserved for Side 2 BAM |
|
239-255
|
|
Number of sector available on track 54 to
70 ** |
* A binary of 1 indicates that the sector is available,
while 0 indicates an allocated sector.
** Each track by each byte.
| SIDE
2 BAN |
|
TRACK 53 SECTOR 0 |
|
BYTE
|
CONTENTS
|
DESCRIPTION
|
|
0
|
|
Track 36, sector 0-7 availability map * |
|
1
|
|
Track 36, sector 8-15 availability map * |
|
2
|
|
Track 36, sector 16-23 availability map
* |
|
> > >
|
|
|
|
102
|
|
Track 70, sector 0-7 availability map * |
|
103
|
|
Track 70, sector 8-15 availability map * |
|
104
|
|
Track 70, sector 16-23 availability map
* |
|
105-255
|
0
|
Not used |
* A binary of 1 indicates that the sector is available,
while 0 indicates an allocated sector.
