本程序是用汇编语言实现数字时钟功能的.通过修改8259中断控制器的中断屏蔽寄存器(21H号端口) 打开时间中断, 实时中断, 键盘中断-this procedure is used assembly language digital clock function. By amending the 8259 interrupt controller interrupt masking registers (21H, port) to open the interruption time, real

Keli3开发平台 AT89C52单片机 C语言 1602液晶显示 基本电子表功能 定时功能 DS1302实时时钟-Keli3 development platform AT89C52 single chip microcomputer C 1602 liquid crystal display the basic functions of electronic timing DS1302 real-time clock