Abstract: A notebook computer top cover mounting hardware comprising a mainframe having a movable support pivoted to a top edge thereof at one side, and a top cover connected to said movable support by a movable rod and a holding plate for holding a display, wherein engaging a side pin of said movable rod from a first annular groove to a second annular groove inside said holding plate causes said top cover to be rotated through 180.degree. angle for turning said display from a concealed position to the outside for performing a data input operation through a pen device conveniently.