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Table 5.
VIC-1540 BAM Format
Track 18, Sector 0.
BYTE
0,1
2
3
4-143
CONTENTS
18,01
65
0
DEFINITION
Track and sector of first directory block.
ASCII character A indicating 1540 format
(Same as CBM 4040).
Null flag for future DOS use.
Bit map of available blocks for tracks 1-35.
*1 = available block
0 = block not available
(each bit represents one block)
Table 6.
Directory Header
Track 18, Sector 0.
BYTE
144-161
162-163
164
165,166
166-167
171-255
CONTENTS
160
50,65
160
0
DEFINITION
Disk name padded with shifted spaces.
Disk ID.
Shifted space.
ASCII representation for 2A which is DOS version
and format type.
Shifted spaces.
Nulls, not used.
Note: ASCII characters may appear in locations 180 thru 191 on some
diskettes.
44
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