| 摘要 |
<p>PURPOSE:To prevent the erasion of information or the mechanical breakage of a memory medium that is caused when an operator cuts off a power supply inadvertently, by providing a power supply cut-off instruction invalidating means to inhibit the cut-off of the power supply of an information processor while an electrical or mechanical system of the processor is working. CONSTITUTION:Receiving a power supply cut-off instruction signal 13, a power supply cut-off instruction valid/invalid deciding circuit 4 delivers a power supply cut-off permission signal 14 to a power supply circuit 5 as long as both logical and mechanical action mode display signals 11 and 12 are not under an action mode display. Thus, the signal 13 is invalidated even in case an operator cuts off inadvertently the power supply of an information processor while an electrical or mechanical system is working. Therefore, the circuit 5 is never actuated. While a power supply cut-off instruction valid/invalid decision suppressing circuit 6 suppresses a suppression signal 16 to control the circuit 4 under an inactive state, i.e., a suppression state. Thus, since the circuit 4 is controlled to be a non-active state or a suppression state, the signal 13 is supplied directly to the circuit 5 and the power supply of the processor is cut off. In such a way, the information erasion or the mechanical breakage of a memory medium can be avoided against the inadvertent cut-off of the power supply done by an operator by providing the circuit 4.</p> |
