对于系统级语言设计之一的中断程序设计包括软中断和硬中断。后者设计到硬件端口的读写操作等等，应该用汇编实现比较好。而前者用C实现就要方便得多的了。-For system-level language design, one of the interrupt program design including soft and hard break interrupt. The latter design to the hardware port to read and write operation