Patent ID: 6622262
Filing Date: 2003-09-16
Classification: G06F

Abstract:
A fault tolerant computer system, comprising:a main computer with a clock signal, an auxiliary computer for normally virtually executing a same processing as that executed by said main computer, an object alternatively connected to either said main computer or said auxiliary computer for executing data transmission or data reception, switch means connected to the object for switching a connection between the object and either said main computer or said auxiliary computer so that when the clock signal is sent from the main computer, the switch means connects the main computer to the object and sends a selected signal to the main computer, and when the clock signal of the main computer is stopped, the switch means connects the auxiliary computer to the object and sends a selected signal to the auxiliary computer, and a dual port RAM for storing data obtained by a processing communication between the main computer and the object, said dual port RAM being arranged to be shared by said main computer and said auxiliary computer such that the main computer writes the data obtained in the processing communication to the dual port RAM, the written data are shared by the main computer and auxiliary computer, and the auxiliary computer, if actuated, executes a same processing as that executed by the main computer by using the stored data.