公开(公告)号：US4268902A

公开(公告)日：1981-05-19

申请号：US953673

申请日：1978-10-23

申请人： Neil C. Berglund ,  James R. Nieling

发明人： Neil C. Berglund ,  James R. Nieling

IPC分类号： G06F13/00 ,  G06F9/00 ,  G06F11/273 ,  G06F11/00

CPC分类号： G06F11/2733

摘要： A maintenance interface is provided for interfacing a service processor and a central processing unit operating asynchronously to each other. The maintenance interface includes circuitry for synchronizing the service processor to the central processing unit and decode circuitry for interpreting commands from the service processor. The maintenance interface also includes circuitry responsive to control signals from the central processing unit such that the maintenance interface establishes communication between the service processor and the central processing unit. The central processing unit includes a microprocessor for interpreting data sent between the service processor and the central processing unit. The maintenance interface is responsive to control signals from the central processing unit to resolve communication contention between the central processing unit and the service processor. The maintenance interface further facilitates the use of the LSSD testing procedure by degating central processing unit interfaces as required for this testing approach.

摘要翻译： 提供了维护接口，用于将服务处理器与彼此异步操作的中央处理单元进行接口。 维护接口包括用于将服务处理器同步到中央处理单元的电路和用于解释来自服务处理器的命令的解码电路。 维护接口还包括响应于来自中央处理单元的控制信号的电路，使得维护接口在服务处理器和中央处理单元之间建立通信。 中央处理单元包括用于解释在服务处理器和中央处理单元之间发送的数据的微处理器。 维护接口响应于来自中央处理单元的控制信号，以解决中央处理单元和服务处理器之间的通信争用。 维护界面进一步有助于通过按照本测试方法的要求对中央处理单元接口进行去光处理来使用LSSD测试程序。