Pokew()

         Stores a word at memory

    Syntax:

         Pokew( nSegment, nOffset, nWord ) -> Nil

         nSegment : Memory Segment
         nOffset  : Memory Offset
         nWord    : Word to store

    Description:

         DANGER!!
         This function allows low level access to system. It should be used
         with extreme care and requires a thorough knowledge of computer
         Architecture.

    Return:

         Nothing.

    Example:

         Pokew ( 64, 0, 65535 )         //  0040:0000h = FFFFh