This paper describes the design of reliable controller for interprocessor communication network (IPCN), which sends and receives information among processors through asynchronous transfer mode (ATM) switches. Hardware mainly is composed of a transmitting section, in which messages are decomposed into cells, and a receiving section, in which cells are assembled into messages. Software is composed of an interface section for communication with an application program and a driver section for driving IPC control device. The IPC controller is doubly designed, so it is possible to provides continuous service for the system when upgrading or changing the software.
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