INT 21 - DOS - ALLOCATION TABLE INFORMATION FOR SPECIFIC DEVICE        

Input

DOS1 N DOS2 Y

DOS3

Y DOS5 Y

Output

AX

1Ch     Sectors/Alloc AX

BX

         

CX

    Bytes per Sector CX

DX

  Drive (0=A, 1=B) Allocation Units on Disk DX

ES:DI

  Points to FAT ID Byte DS:BX
See Also 1Bh 36h


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