| 摘要 |
PROBLEM TO BE SOLVED: To suppress the occurrence of system down that is caused by two bit memory error by reading memory data by using the idle time of an MPU, reading entire memory space and performing memory data check through an ECC(single error correction/double error detection) feature. SOLUTION: A main storage error management feature 120 detects the memory capacity of a main storage device 180, memory structure information 130 of the address, etc., of a mounting start, the address of the latest one bit error and the number of errors and maintains them as memory error information 140. Also, a memory access operating means 190 acquires the information 140 of the device 180 from the feature 120 by using the idle time of an MPU 110 and reads data in a memory space according to the mounting start address of the information 130 and the memory capacity. Thereby, the range of memory error repair which is conventionally local is expanded to the one for entire memory space, memory failure is suppressed and the operation of the memory can be improved. |
