INT 21 - DOS 2.25, Far East DOS 3.2+ - GET KOREAN (HANGUL) INPUT MODE
        AX = 6302h
Return: AL = status
            00h successful
                DL = current input mode
                    00h return only full characters
                    01h return partial characters
            FFh not supported
SeeAlso: AH=08h,AH=0Bh,AH=63h,AX=6301h