| 摘要 |
PURPOSE:To enable recovery processing while keeping continuity of processing at failure in main storage device storing not rewritten part, by storing a program to different main storage devices by separating the program into a part which can not be rewritten at execution and other parts. CONSTITUTION:Storage devices 40, 50 which respectively store a program area which is not rewritten at program execution and another program area which is rewritten, are provided, and the error is reported to a CPU10 at an error report contral section 210 at error generation, and an execution control section 110 of the CPU10 discriminates if this storage device stores the program area not rewritten or the program area rewritten. If the error is an error of the storage device 40, the program part not rewritten is read out from an auxiliary storage device 30 under the control of a main storage write/read control section 220 through the instruction of the control section 110 and restored in the storage device, and the processing is restarted from the instruction at error generation, by using the program area which is restored and not rewritten. |
