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例外处理机制已经成为当前容错系统的一个重要机制。本文首先介绍ＲＩＳＣ例外处理机制，然后用实例说明其在ＲＩＳＣ基本系统的调试中对于故障的诊断、定位和消除所起到的重要作用。
Exception handling mechanisms have become an important mechanism for fault-tolerant systems today. This article first introduces the RISC exception handling mechanism, and then illustrates the important role it plays in fault diagnosis, location and elimination in the debugging of RISC basic system.