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

C语言写的一个DS1302实时时钟程序，这个很多时候应用在视频叠加系统。-C language written by a real-time clock procedures DS1302, often used in video overlay system.

ds1302实时时钟芯片的运用，含源代码-ds1302 real time clock chip used, with source code ...

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