Ex parte SAITO - Page 2




          Appeal No. 2000-1289                                       Page 2           
          Application No. 08/604,829                                                  


          device.  When the processing of a prescribed amount of data is              
          not completed in a certain time, however, reproduction of a                 
          resulting image or a sound is impeded.  A high-speed magnetic               
          storage device is required to solve this problem.                           


               The appellant’s invention switches between two memory                  
          groups having the same structure so that the two groups are                 
          used alternately.  As shown in Figure 1 of the appellant’s                  
          specification, the first memory group (10) and the second                   
          memory group (11) each comprise a number of memory devices                  
          (101-106 and 111-116, respectively) equal to a number of                    
          magnetic disk communication means (4-9).  A switch (12)                     
          enables connection between one of the first and second memory               
          groups and the magnetic disk communications means and also                  
          between the other one of the memory groups and an external                  
          communication means (2).  When the memory devices in one of                 
          the two memory groups communicate with the magnetic disks, the              
          memory devices in the other group communicate with the                      
          external equipment, and vice versa.  Such an arrangement                    
          permits parallel processing of data at a high speed.                        









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