Int 4D Fn 01  - Ti Professional Pc - Disk - Get Status Of Last Operation   [B]

   AH = 01h
   DL = drive (bit 7 set for hard disk)

Return: CF clear if status unchanged
   CF set if status changed since last call
   AH = 00h
   AL = status of previous operation (see #0166 at INT 13/AH=01h)

Notes: this function is nearly the same as INT 13/AH=01h on a standard PC BIOS
   the TI's BIOS tranparently performs a number of retries, and an error
     status is only reported if all of the retries fail.  To get the error
     status if the operation succeeded on a retry, use AH=07h instead

See Also: AH=00h,AH=07h,INT 13/AH=01h