User`s manual

Block Distribution by Track
1540/1541 BAM FORMAT
55
2040,3040
Block or
Track number
Sector Range
Total
I to 17 o to 20
21
18 to 24 o to 19 20
25 to 30
o to 17
18
31 to 25 o to 16
17
4040
Block or
Track number
Sector Range
Total
1 to 17
o to 20
21
18 to 24
o to 18
19
25 to 30 o to 17 18
31 to 35
o to 16 17
8050 Block or
Track number
Sector Range
Total
1 to 39 o to 28
29
40 to 53
o to 26 27
54 to 64 o to 24
25
65 to 77
o to 22
23
Track 18, Sector O.
BYTE
CONTENTS
DEFINITION
0,1 18,01
Track and sector of first directory block.
2 65
ASCII character A indicating 4040 format.
3 0
Null flag for future DOS use.
4-143
Bit map of available blocks for tracks 1.35.
*1
=available block
O=blocknot available
(each bit represents one block)