| 摘要 |
<p>PURPOSE:To attain a restart at a low cost, in a short time, and with a high reliability by holding the storage content of a main storage device constituted of a volatile memory or the like by a power supply from a battery device. CONSTITUTION:A commercial power source is inputted to a main power source supplying device 10 and a sub-power source supplying device 11, the output of the main power source supplying device 10 is inputted to a rectifying part 14 in a main storage device 8 or an extended storage device 9, supplied to a logical part 15, and supplied through a diode 17 to an RAM part 16 constituted of the volatile memory. On the other hand, the sub-power source supplying device 11 incorporates a battery to be charged by the commercial power source, and the output of the sub-power source supplying device 11 is supplied through a diode 18 to the RAM 16. That is, the power source for operation is always supplied from the sup-power source supplying device 11 to the RAM 16 being the volatile memory regardless of the stoppage or start of the supply of the output of the main power source supplying device 10, and the storage content can be held by the RAM 16 even at the time of the disconnection of the commercial power source.</p> |
