BYTE
0
I
2
3
4
5
6
7
8
9
10
11
...
140
141
142
143
144-159
160-161
162-163
164
165-166
167-170
171-220
221-237
238
239-244
245-250
251-255
BAM FORMAT/DIRECTORY HEADER (1571 MODE)
Track 18, Sector 0
CONTENTS DEFINITION
18
Track
of
next directory block (always
18)
I
Sector
of
next directory block (always I)
65
ASCII character A indicating
1541115511157114040
format
Double-sided Flag: $80
= double-sided; $00 = single-sided
Number
of
sector available on track 1
Track
1,
sector 0-7 availability map*
Track
1,
sector 8-16 availability map*
Track
1,
sector 17-23 availability map*
Number of sector available on track 2
Track 2, sector 0-7 availability map*
Track 2, sector 8-16 availability map*
Track 2, sector 17-23 availability map*
Number
of
sector available on track
35
Track 35, sector 0-7 availability map*
Track 35, sector 8-16 availability map*
Track 35, sector 17-23 availability map*
Diskette name padded with shifted spaces [CHR$(160))
160
Shifted space [CHR$( 160) 1
Diskette
ID
160
Shifted space [CHR$(160))
ASCII representation
of
2A, which are respectively,
the DOS version
(2)
and format type
(154011541115511
157114040/2030).
Shifted spaces [CHR$(160)]
Nulls [CHR$(O)], not used
Number of sector available on track 36 - 52
(each sector
by
each byte)
0 Number
of
sector available on track
53
(always 0,
all
sectors are allocated)
Number
of
sector available on track 54 - 59
(each track by each byte)
Number
of
sector available on track
60
-
65
(each track by each byte)
Number
of
sector available on track 66 - 70
(each track by each byte)
*
% I = available sector
(%
means binary)
%0
= sector not available (each bit represent one block)
108
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