_putca -- put character and attribute 

        USAGE

          _putca(page, atch, row, col);
          int page, row, col;
          unsigned atch;

                page - video page #
                atch - attribute and character
                         attribute in high order byte
                         character in low order byte
                row -  row position for character (0-24)
                col -  column position for character (0-79)

          _putch is a general purpose routine that can be used outside of
          the window environment.

        RETURNS

          Nothing.

        CAUTIONS

          None.