INT 6F - 10NET - LOCK FCB AH = 11h AL = mode 01h sequential 02h random 03h 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=12h,INT 21/AH=0Fh