使用汇编语言实现数字时钟设计，用7seg完成显示，并可以通过button对时钟进行调整。并包括系统仿真原理图，适合做设计者使用-The use of assembly language to achieve digital clock design, with the completion of 7seg show, and can adjust the button on the clock. And includes system simulation schematic diagram, suitable for designers to use