But there is a key difference between interrupt handling and process switching: the code executed by an interrupt or by an exception handler is not a process.
然而在中断处理和进程切换之间有一个关键的区别：由中断或异常处理执行的代码不在进程中。
Before dealing with that instruction, the control unit checks whether an interrupt or an exception occurred while the control unit 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。
The last step performed by the control unit is equivalent to a jump to the interrupt or exception handler.
控制单元进行的最后一步等同于跳到中断或异常处理函数。
This descriptor specifies the base address of the segment that includes the interrupt or exception handler.
这个描述符指明了包含中断或异常处理函数的段的基地址。
These values define the logical address of the first instruction of the interrupt or exception handler.
这些值定义了中断或异常处理函数的第一条指令的逻辑地址。
Each entry corresponds to an interrupt or an exception vector and consists of an 8-byte descriptor.
每个条目对应一个中断或异常向量，并且有8byte的描述符组成。
Some key issues of this technique, including interrupt simulation, exception handling and the construction of multiprogramming environment, are also elaborated.
研究了在应用开发环境中调试内核的关键技术，包括中断模拟、常处理、道程序执行环境的建立等。
Some key issues of this technique, including interrupt simulation, exception handling and the construction of multiprogramming environment, are also elaborated.
研究了在应用开发环境中调试内核的关键技术，包括中断模拟、常处理、道程序执行环境的建立等。
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