Ex parte MATTISON - Page 2




          Appeal No. 95-1851                                                           
          Application 07/902,186                                                       

                         References Relied on by the Examiner                          
          Belch                    4,618,858                 Oct. 21, 1986             
                               The Rejection on Appeal                                 
               Claims 1-4 stand rejected under 35 U.S.C. § 103 as being                
          unpatentable over Belch.                                                     
                                    The Invention                                      
               This invention is directed to a circuit and method for                  
          converting high resolution display data to a format suitable for             
          display on a display device of lower resolution.  Only a portion             
          of the full high resolution image can be displayed on the display            
          device of lower resolution.  Memory accesses to areas which fall             
          outside the range of applicable data for display on the lower                
          resolution display device are selectively blocked.                           
               Representative claims 1 and 3 are reproduced below:                     
                    1. A circuit for providing automatic virtual display               
               panning for driving VGA display data on a lower                         
               resolution display comprising, in combination:                          
                    frame buffer memory means for storing a full resolution            
               VGA image;                                                              
                    display means coupled to said frame buffer memory means            
               and having a resolution less than the resolution of                     
               said frame buffer memory means for providing a display;                 
                    VGA controller means for transferring display data in              

          claims contained in the brief is correct.  Note that Amendment C             
          cancels claim 5.  We consider Amendment C as having been entered.            

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