INT 6F - 10NET - UNLOCK FCB AH = 12h AL = mode 00h sequential 01h random 02h random block CX = number of records DS:DX -> FCB (see #01345 at INT 21/AH=0Fh) Return: CF clear if successful CF set on error AX = error code (see also #03740) 0002h file not found SeeAlso: AH=11h