说明：  利用DOS提供的中断调用功能和BIOS系统调用功能，利用微机本身的中断向量表，实现对微机的时钟的管理操作。让微机在显示器上模拟显示一个时钟。
(use of the DOS interrupt function called BIOS system calls and functions, the use of computer itself to the interruption of scale and achieve the computer's clock management operation. The displays allow computer simulation shows a clock.)