说明：  这个时钟是用汇编语言开发的，针对8086芯片而创造的。不仅可以作为时钟，而且可以当成是定时器，具有8个不同时间的定时，在定时时间到达后，就可以给相应的端口输出高电平
(The clock is developed in assembly language for 8086 chips and creativity. Not only can serve as a clock, but also as a timer, with eight different times of the timing, in the regular time of arrival, you can to the appropriate port output high)