| 摘要 |
PURPOSE:To prevent a system from being shut down without causing an increase in hardware size and a decrease in operation speed, by providing an substitute storage device 6 for a control and storage device, and storing an error address and correct information to be stored in the address in a pair. CONSTITUTION:The control and storage device 1 and the substitute storage device 6 are cleared in an initial state and a service processor SVP sets a program from an external storage device in the control and storage device 1 through a CSDR3 and a line 11. On the basis of the contents of the device 1, processing is performed and once a one-bit error is detected during the operation of the device 1, an error detecting and correcting circuit 4 sets corrected information in a microinstruction register MIR5. If an uncorrectable error is detected, the circuit 4 actuates an address counter 8 and the contents of the device 6 are read in a register 7; and a comparator 9 compares them with the output of a microinstruction counter 2 to detect a coincident signal and an interruption for a machine check is reported to the SVP, thereby preventing the system from being shut down. |
