Commodore 1551 User Manual page 87

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BYTE
144-159
160-161
162-163
164
165-166
167-170
170-255
BYTE
1551 DIRECTORY HEADER
Track 18, Sector O.
CONTENTS
DEFINITION
Diskette name padded with shifted spaces.
160
Shifted spaces.
Diskette ID.
160
Shifted space
50,65
ASCII representation of 2A, which are, respectively,
the DOS version (2) and format type
(1551/4040).
160
Shifted spaces.
0
Nulls
($00),
not used.
PROGRAM FILE FORMAT
DEFINITION
FIRST SECTOR
0,1
Track and sector of next block in program file.
I
2,3
Load address of the program
4-255
Next 252 bytes of program information stored as in computer
memory (with key words tokenized).
REMAINING FULL SECTORS
0,1
Track and sector of next block in program file.
I
2-255
Next 254 bytes of program info stored as in computer memory
(with key words tokenized).
FINAL SECTOR
0,1
Null
($00),
followed by number of valid data bytes in sector.
2-???
Last bytes of the program information, stored as in computer
memory (with key words tokenized). The end of a Basic file is
marked by 3 zero bytes in a row. Any remaining bytes in the
sector are garbage, and may be ignored.
79

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