In other words, the instruction processed by the controlunit after dealing with the interrupt signal is the first instruction of the selected handler.
换句话说，控制单元在解决完中断信号后，处理的指令就是选中的处理函数的第一条指令。
2
Before dealing with that instruction, the controlunit checks whether an interrupt or an exception occurred while the controlunit executed the previous instruction.
在执行这个指令之前，控制单元检查在它执行前一条指令时，是否有中断或异常产生。
3
The last step performed by the controlunit is equivalent to a jump to the interrupt or exception handler.