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Function 1Bh Get Current Drive File Allocation Table Information

Returns information from the FAT on the current drive

entry AH 1Bh

exit AL number of sectors per allocation unit (cluster)

DS:BX address of the current drive's media descriptor byte

CX number of bytes per sector

DX number of allocation units (clusters) for default drive

note 1) Save DS before calling this function.

2) This call returned a pointer to the FAT in DOS 1.x. Beginning with

DOS 2.00, it returns a pointer only to the table's ID byte.

3) IBM recommends programmers avoid this call and use int 25h instead.




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