.Hex-calc/Time-calc/Timestamp-conv/Decimal-fraction-calc.
      XBC cmd is used to base change between Hex,Decimal and Octal digit.
      XBC cmd prepare binary operation such as +,-,*,/,%,!,<,>,&,|,^.
      (!:power;<,>:shift,^:X-or).Time data can be calculated.
      XBC support double word(8 byte) or decimal fraction.
      Timestamp(elappsed seconds from 1970) is converted to date and time.
      Mainframe 8 byte TOD is also converted.