显示当前系统时间的汇编程序：将系统时间取出（二进制）然后转换成Ascii码形式再通过功能调用显示字符，执行后使当前的系统时间显示在dos窗口下。-Shows the current system time of the compilation process: the system time out (binary) and then converted to Ascii codes and then by the form of function calls shows characters, post-implementation so that the current system time displayed in the dos windows