Commodore Computer Commodore 64 Manual de usuario descargar pdf (Pagina 27)

500 B$=""

510 FORL=OTOJ

520 GET#I,A$ BUILD A

530 IFA$ < > CHR$(96)THENIFA$ < > CHR$(160)THENB$=B$+A$f STRING

540 NEXT ~SUBROUTINE

550 RETURN

Table 5.1: 1540{1541 BAM FORMAT

Table 5.2: 1540/1541 DIRECTORY HEADER

Track 18, Sector O.

BYTE CONTENTS

DEFINITION

0,1 18,01

Track and sectOrof first directory block

2 65

ASCIIcharacter A indicating 4040 format.

3 0

Null flag for future OOSuse.

4-143

Bit map of availableblocks for trac so1-35.

... 1 =available block

o = block not available

(each bit represents one block)

Track 18, Sector O.

BYTE CONTENTS DEFINITION

144-161

Disk name padded with shifted spaces.

162-163 Disk lD.

164

160

Shifted space.

165,166

50,65

ASCII representation for 2A which is DOSversion

and format type.

166-167 160

Shifted spaces.

171-255 0

Nulls, not used.

Note: ASCIIcharacters may appear in locations 180 thru 191 on some diskettes.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 64 65

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Commodore Computer Commodore 64 Manual de usuario Pagina 27