INT 33h,  04h (4)        Set Mouse Cursor Position

    Sets the cursor to a specified position.

       On entry:      AX         04h
                      CX         Horizontal Coordinate
                      DX         Vertical Coordinate

       Returns:       Nothing

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    Function 4 sets the mouse cursor to the specified horizontal and
    vertical screen coordinates. The parameter values must be within the
    horizontal and vertical ranges for the virtual screen.

    If the screen is mot in high resolution mode, the parameter values are
    rounded to the nearest horizontal and vertical coordinate values
    permitted for the current screen mode.