Int 21 Fn 53  - Dos 2+ Internal - Translate Bios Parameter Block To Drive  [D]

   AH = 53h
   DS:SI -> BIOS Parameter Block (see #1349)
   ES:BP -> buffer for Drive Parameter Block (see #1083 at AH=32h)

Return: ES:BP buffer filled

Notes: for DOS 3.0+, the cluster at which to start searching is set to 0000h
     and the number of free clusters is set to FFFFh (unknown)
   if the number of sectors per cluster is set to zero, MS-DOS will hang
     at startup because it computes the internally-used shift count by
     shifting this value right until the carry flag is set; since this
     will never happen when the field is zero, MS-DOS hangs
   not supported by Windows NT 3.1

Format of BIOS Parameter Block:
Offset Size    Description (Table 1349)
 00h   WORD    number of bytes per sector
 02h   BYTE    number of sectors per cluster
 03h   WORD    number of reserved sectors at start of disk
 05h   BYTE    number of FATs
 06h   WORD    number of entries in root directory
 08h   WORD    total number of sectors
       for DOS 4.0+, set to zero if partition >32M, then set DWORD at
         15h to actual number of sectors
 0Ah   BYTE    media ID byte (see #1044)
 0Bh   WORD    number of sectors per FAT
---DOS 2.13---
 0Dh   WORD    number of sectors per track
 0Fh   WORD    number of heads
 11h   WORD    number of hidden sectors
---DOS 3.0+ ---
 0Dh   WORD    number of sectors per track
 0Fh   WORD    number of heads
 11h   DWORD   number of hidden sectors
 15h 11 BYTEs  reserved
---DOS 4.0+ ---
 15h   DWORD   total number of sectors if word at 08h contains zero
 19h  6 BYTEs  ???
 1Fh   WORD    number of cylinders
 21h   BYTE    device type
 22h   WORD    device attributes (removable or not, etc)
---DR DOS 5+ ---
 15h   DWORD   total number of sectors if word at 08h contains zero
 19h  6 BYTEs  reserved
---European MS-DOS 4.00---
 15h   DWORD   total number of sectors if word at 08h contains zero
       (however, this DOS does not actually implement >32M partitions)

See Also: #1083,#1350

Format of Extended BIOS Parameter Block:
Offset Size    Description (Table 1350)
 00h 25 BYTEs  same as standard DOS 4-6 BPB (see #1349)
 19h   DWORD   sectors per FAT if WORD at 0Bh is 0000h
 1Dh   WORD    extended flags
       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
 1Fh   WORD    file system version (high byte=major, low byte=minor)
 21h   DWORD   starting cluster number of root directory
 25h   WORD    file system information sector number (see also #1476)
 29h  6 WORDs  reserved

See Also: #1247