Int 21 Fn 7302  - Windows95 - Fat32 - "get_extdpb" - Get Extended Dpb      [D]

   AX = 7302h
   DL = drive number (00h=default, 01h=A:, etc.)
   ES:DI -> buffer for drive parameter block (DPB) (see #1475)
   CX = length of buffer

Return: CF clear if successful
       ES:DI buffer filled
   CF set on error
       AX = error code

See Also: AX=7303h,AX=7304h,AH=1Fh,AH=32h

Format of Extended Drive Parameter Block:
Offset Size    Description (Table 1475)
 00h 24 BYTEs  standard DOS 4+ DPB
 18h   BYTE    "dpb_flags" (undocumented)
 19h   DWORD   pointer to next DPB
 1Dh   WORD    cluster at which to start search for free space when writing,
       usually the last cluster allocated
 1Fh   WORD    number of free clusters on drive, FFFFh = unknown
 21h   WORD    high word of free cluster count
 23h   WORD    active FAT/mirroring
       bits 3-0: the 0-based FAT number of the active FAT
       bits 6-4: reserved (0)
       bit 7: do not mirror active FAT to inactive FATs
 25h   WORD    sector number of file system information sector, or
         FFFFh for none (see also #1476)
 27h   WORD    sector number of backup boot sector
 29h   DWORD   first sector number of the first cluster
 2Dh   DWORD   maximum cluster number
 31h   DWORD   number of sectors occupied by FAT
 35h   DWORD   cluster number of start of root directory

Note:  except for offset 18h, all of the first 33 bytes are identical to
     the standard DOS 4-6 DPB

See Also: #1083 at AH=32h,#1350

Format of File System Information structure:
Offset Size    Description (Table 1476)
 00h   DWORD   signature 61417272h
 04h   DWORD   number of free clusters (FFFFFFFFh if unknown)
 08h   DWORD   most recently allocated cluster
 0Ch 12 BYTEs  reserved

See Also: #1475