Int 13 Fn 1C0C  U - Esdi Fixed Disk - Get Pos Information                  [d]

   AX = 1C0Ch
   ES:BX -> buffer for POS Information Status Block (see #0194)

Return: CF set on error
   CF clear if successful
   AH = status (see #0166 at AH=01h)

See Also: AX=1C0Bh

Format of ESDI POS Information Status Block:
Offset Size    Description (Table 0194)
 00h   BYTE    EAh
 01h   BYTE    number of words in block (05h)
 02h   WORD    magic value FFDDh
 04h   BYTE    POS register 3
 05h   BYTE    POS register 2
 06h   BYTE    POS register 5 (unused, FFh)
 07h   BYTE    POS register 4 (unused, FFh)
 08h   BYTE    POS register 7 (unused, FFh)
 09h   BYTE    POS register 6 (unused, FFh)