Commodore Computer Commodore 64 Manuel d'utilisateur télécharger pdf (Page 61)

RELATIVEFILEFORMAT

DATA

BLOCK

BYTE

DEFINITION

0,1

Track and sector of next data block.

2-256

254 bytes of data. Empty records contain FF (all binary ones) in

the first byte followed by 00 (binary all zeros) to the end of the

record. Partially filled records are padded with nulls (00).

SIDE SECTOR BLOCK

BYTE

DEFINITION

0-1

Track and sector of next side sector block.

Side sector number (0-5)

Record length

4-5

Track and sector of first side sector (number 0)

6-7

Track and sector of second side sector (number 1)

8-9

Track and sector of third side sector (number 2)

10-11

Track and sector of fourth side sector (number 3)

12.13

Track and sector of fifth side sector (number 4)

14-15

Track and sector of sixth sidesector (number 5)

16-256

Track and sector pointers to 120 data blocks

1 2 ... 56 57 58 59 60 61 62 63 64 65

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Commodore Computer Commodore 64 Manuel d'utilisateur Page 61