Int 13 Fn 0A  - Hard Disk - Read Long Sector(s) (at And Later)             [B]

   AH = 0Ah
   AL = number of sectors (01h may be only value supported)
   CH = low eight bits of cylinder number
   CL = sector number (bits 5-0)
        high two bits of cylinder number (bits 7-6)
   DH = head number
   DL = drive number (80h = first, 81h = second)
   ES:BX -> data buffer

Return: CF clear if successful
   CF set on error
   AH = status (see #0166)
   AL = number of sectors transferred

Notes: this function reads in four to seven bytes of error-correcting code
     along with each sector's worth of information
   data errors are not automatically corrected, and the read is aborted
     after the first sector with an ECC error
   used for diagnostics only on PS/2 systems; IBM officially classifies
     this function as optional

See Also: AH=02h,AH=0Bh,MEM 0040h:0074h