INT 21 - DOS 1+ - GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE AH = 1Fh Return: AL = status 00h successful DS:BX -> Drive Parameter Block (DPB) (see #01357 for DOS 1.x, AH=32h for DOS 2+) FFh invalid drive Note: this call was undocumented prior to the release of DOS 5.0; however, only the DOS 4.0+ version of the DPB has been documented SeeAlso: AH=32h,AX=7302h