| 摘要 |
PURPOSE:To avoid the collective separation of subordinate devices, by performing a switch control of the subordinate devcies in response to the state of connection between an information processing system and the system of the subordinate devices. CONSTITUTION:A common changeover switch SWC is provided together with a pair of individual switches SWA and SWB. The operation of the SWC is invalidated when both SWA and SWB are in the same state, i.e., an inverse state or a noninverse state. When one of the SWA and SWB is inverse with the other noninverse, the states of these switches are reversed respectively by the function of the SWC. The outputs of SWA and SWB are delivered through an output control circuit 4. |
