this IS a collection of chain, which contains some based operations

at89s51控制的可调倒计时程序，是用汇编语言实现的。可以显示小时和分钟。-AT89S51-controlled adjustable countdown procedures, assembly language is achievable. Can display hours and minutes.

类似于Windows自带的Ping.exe程序，用 ICMP 协议实现 Ping 的功能；socket的另一种用法-Ping.exe similar to Windows

汇编语言实现的接口8255A编程 一个很好用的代码  上课实验时写的

这是一个用硬件描述语言来设计的交通灯程序，和实用，很经济。-This is a hardware description language used to design the traffic light procedures, and practical, it is economic.

S1实验板 AT89C51 12M晶振 加法实验(52H+FCH=01001110B)在P1口显示 -S1 board AT89C51 12M Adder crystal experiment (52H+ FCH = 01001110B) in the P1 I show

查看本地文件信息-View local file information

点阵LED字符显示器的设计 可以显示四个汉字。 并且可以按照不同的方式显示出来。 -lattice LED character display will show the design of four Chinese characters. And according to different ways of show.

外国人写的dds控制源代码。有兴趣的朋友可以看看！-Written by foreigners dds source code control. Interested friends can see!

51警报声的汇编程序,可用于防盗类产品用,-51 warning sound compilation procedure can be used for anti-theft products, and

51交通灯设计用74LS273作为输出口，带汇编程序，电路图。-51 traffic lights designed for use 74LS273 as the output port with assembler, circuit diagrams.