| 摘要 |
PURPOSE:To prevent malfunction due to a noise in an information processing system which controls an electronic computer system on a common-bus basis, by controlling the electronic computer system when a prescribed access key in set. CONSTITUTION:In an information processing system wherein a centralized monitoring controller composed of an electronic computer on a common-bus basis controls an electronic computer system through a system interface controller, commands and data are allowed to be written in the system interface circuit 10 once a prescribed access key is set in the access key register 12 of the system interface controlling circuit 10. Once the contents of the access key register 12 are cleared, writing processing is inhibited. Thus, the malfunction of the electronic computer system due to a noise from a common bus 9 is prevented. |
