某些处理机可能产生的一些中断，这些中断是由于程序设计错误、特殊指令或维护功能部件所引起的。
Interrupts which can be generated within some processors, and are caused by programming errors, special instructions, and maintenance features.
中央处理机的一种基本特性，在下一条指令执行完毕前允许屏蔽中断请求。
Basically, a feature of the CPU that permits the machine to mask an interrupt request until the following instruction has been completed.
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