| 摘要 |
PURPOSE:To perform the switching of a system in current use and a spare system and the restart of an interrupted point when the power source of a system in current use is interrupted and to prevent EMA from occurring in the system configuration control system of a duplex system. CONSTITUTION:The power are supplied from the power source parts 51, 52, of two systems to the system clock oscillation parts 11, 12 and control parts 21, 22 of both systems, and the contents of the main memory 31, 32 of both systems are conformed to each other, and the connection destinations of the channel controllers 41, 42 of both systems are conformed to each other, and the power source minitoring parts 61, 62 of both systems generate signals representing the interruption of power sources of its own system and another system. When the power source of the system in current use is interrupted, the control part of the system in current use delivers control to a microprogram by the interruption of the power source of its own system, and after the content of the internal register of the control part of the system in current use is transferred to the control part of the spare system, its own system is set as the spare system, and the another system as the system in current use, and the another system is started up, and its own system transits to a suspension state. After the control part of a started up new system in current use configures the master/slave relation of the main memory and the channel controllers, the control is delivered to the microprogram, then, the interrupted point can be restarted. |
