I/O interrupt indicator

A device used to determine the I/O unit originating an interrupt and the cause of the interrupt by testing the indicators associated with each I/O channel.; 一种装置,用于判定发出中断信号的输入输出设备及产生该中断的原因,具体做法是 测试与每个输入输出通道相关的输入输出中断指示器。