| 摘要 |
PURPOSE:To prevent an overall function stop of a system, by providing a means for rejecting the flow-in of an electric power supply from other CPU block in case when a self-CPU block has been disconnected from an electric power supply, on an interface, in a composite computer system. CONSTITUTION:CPU block 1A-1C constituting a composite computer system are provided with interfaces 5A-5C for communication and control. These interfaces 5A-5C are provided with not only a function for preventing the flow-in of an electric power supply from other CPU block through a system bus 3 or a control line 4 in a CPU block which has been disconnected from an electric power supply, but also a function by which the right of using of a system bus 3 is controlled without a hitch, therefore, even when disconnection of an electric power supply occurs in one CPU block, a function of other CPU blocks is performed normally. |
