Int 13 Fn 1C09  U - Esdi Fixed Disk - Get Device Status                    [d]

   AX = 1C09h
   DL = drive (80h,81h)
   ES:BX -> buffer for Device Status Block (see #0191)

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

See Also: AX=1C08h,AX=1C0Ah,PORT 3510h"ESDI"

Format of ESDI Device Status Block:
Offset Size    Description (Table 0191)
 00h   BYTE    08h
 01h   BYTE    number of words in block (09h)
 02h   BYTE    error flags
 03h   BYTE    unused
 04h   BYTE    command error code (see #0187)
 05h   BYTE    command status code (see #0188)
 06h   WORD    ESDI standard status
 08h  5 WORDs  ESDI vendor-specific status codes