Backplane system having high-density electrical connectors

Abstract

A computer system architecture in which functionally compatible electronic components are located on modular printed circuit boards. Thus, a type of processor used by the system can be changed by replacing the printed circuit board incorporating the processor. Similarly a type of peripheral bus used can be changed simply by replacing the printed circuit board containing the peripheral controller. High-density connectors connect the circuit boards. Some embodiments of the invention use a single backplane. Other embodiments place peripheral slots on a second, passive backplane.

1 . A computer system, comprising: 
 a local bus;    a memory bus;    a first backplane including; 
 a first printed circuit board containing a microprocessor thereon and connected to the local bus and to the memory bus,  
 a second printed circuit board containing a memory thereon and connected to the memory bus, and  
 a third printed circuit board having a peripheral controller thereon and connected to the local bus; and  
   a second backplane having a peripheral connector and connected to the first backplane.    
     
     
         2 - 57 . (canceled)