| 摘要 |
PURPOSE:To securely perform a saving processing when the power source of a computer system is cut off. CONSTITUTION:The DC power source for the computer system is normally obtained from a commercial power source 11 by the use of a computer power source unit 12 and feeds the computer body 14. In the computer body 14, a CPU 1 performs processing normally by means of a RAM 2 as a memory which is fast but nonvolatile and a hard disk 3a which is slow but has a large capacity. When the computer power source unit 12 detects the disappearance of the commercial power source 11 and sends a power-OFF alarm 15 to the computer body 14, the CPU 1 performs the processing 4 for saving specific data in the RAM 2 to a flash memory 3b which is nonvolatile but fast and small in capacity. Thus, the saving processing is speeded up to securely save the necessary data even when the voltage retention time of the computer power source unit 12 is short. |
