与中断矢量设置与读取有关的DOS功能调用，本例演示了如何编写中断服务程序，如何安装（将中断服务程序的地址设置到中断矢表中），以及如何通过软中断指令调用中断服务程序。为了突出重点，本例中中断服务程序代码未驻留内存。-and vector interrupt settings and read the DOS function calls, which in this case demonstrated how to prepare interrupted service procedures, how to install (to be interrupted service procedures set up to address the interruption vector table), and how soft interrupt directive calling service interruption program. To highlight key issues, in this case the interruption of services not the presence of code memory.