= Hex input mode

        XIN

            -exchange Hex digit input mode and normal input mode.
            -After entered Hex input mode,"x" appear at top-left corner.
            -Hex digit input is accepted on the area file lines diplayed.
            -Char is transfered to cursor pos at end of 2byte input
             for DBCS,but by "x" key only 1st byte of DBCS is transfered.
             But for binary file,No DBCS check is done,and Input-inhibit-
             char check is not done.