INT 13 - HARD DISK - WRITE SECTOR BUFFER (XT only) AH = 0Fh DL = drive number (80h = first, 81h = second hard disk) ES:BX -> buffer Return: CF set on error CF clear if successful AH = status code (see #00234) Notes: does not write data to the drive should be called before formatting to initialize an XT-type controller's sector buffer used for diagnostics only on PS/2 systems SeeAlso: AH=0Bh