| 摘要 |
PURPOSE:To improve the reliability of RAS information by confirming read and write check in a save area and the logic action of a CPU and adding a termination information to data. CONSTITUTION:When the system breaks down, a control arithmetic unit 1 checks the read and write of a termination information area and RAS information save area in a common memory unit 2. When a common memory cannot be normally accessed, an abnormal code is stored in the termination information area. When the action of the CPU in the control arithmetic unit 1 is not normal after four-rule operations, the abnormal code is stored in the termination information area. Then the RAS information is saved in the RAS information area, and the termination information showing that the save ends is stored in the termination information area. Accordingly, when information in the termination information area is referred, the RAS information is checked to be normally saved or not. |
