Matrix switchers chip assembler source code. Manufacturers provide.

实现8251可编程通信实验的汇编源代码 使用环境是星研集成环境-8251 programmable communication experiment to achieve the compilation of source code for the use of the environment is an integrated environment for satellite research

用89C51，外接晶振，复位电路，二个数码管，二个按键，做一个电子秒表，具体要求为用按键起停电子表，可用按键设计倒计时时间(如10S，20S，60S),并启动倒计时功能,能用按键选择以上两功能之一-With 89C51, an external crystal oscillator, reset circuit, two digital tube, two buttons, making an electronic stopwatch, and specific requirements for the use button start-stop electronic watches, key design can be used countdown time (such as 10S, 20S, 60S), and start the countdown function, can be used for more than two buttons select one of the functions

密码锁， 实现密码判断，实现密码更改，实现程序正常结束，实现非软件的准确延时，输入错误3次后自动结束程序，根据操作产生的不同结果配以不同的音效 -Password lock, password realize judgment achieve password change, the end of the normal implementation process, the accurate implementation of non-software delay, enter the wrong end of 3 times after the program automatically, under the operation of the different results produced with different audio

出租车计价器的汇编源程序 比较周全的考虑了实际中所会碰到的问题-the taxi program

液晶屏启动程序，还包括液晶功能函数，画线画图等等。-LCD screen to start the procedure, including liquid crystal function, drawing a line drawing and so on.

扩展存储器实验 运行步骤：1. 将平台板上存储器电源的跳接开关连上 * * 2. 源程序编译，连接，运行 * * 3. 运行后，在屏幕显示的结果中查看 * * BUF2中的内容是否和BUF1的内容一致 *-Steps to expand the memory to run the experiment: 1. Will be the platform on-board storage power supply connected to the tap-dancing* * 2. Source compiler, connectivity, run* * 3. Running, display the results in view* * BUF2 whether the content and the content of BUF1 line*

小动画心 动画显示提示信息"按任意键进入"， 然后就没有任何反映了, 不知道该怎么办了?-small animation heart animation shows a message "by Anykey enter," and then there would be no point to the fact that I do not know how the Office

1、1+1/2+1/3+……+1/n 2、键盘输入任何数字，求其阶乘 3、数组输入和输出 4、求数组的max和min -1,1+1/2+1/3+ ... ...+1/n 2, keyboard input any number, find its factorial 3, an array of input and output 4, seeking an array of max and min

一、 使用键盘显示接口芯片8279接收按键键值，并在七段数码管上显示出来，通过判断键值进入相应音乐播放处理程序。在音乐播放程序中，使用定时器/计数器8253的计数器2，使其工作在方式¬ ¬ 3―方波发生器，通过查表依次取出乐曲频率值送入计数器作为计数初值，经out2输出方波，驱动扬声器发出不同频率的声音，在每个音阶之间加入相应的延迟时间，即实现了音乐的播放。-First, the use of a keyboard display interface chip receive keys keys 8279, and Seven-Segment LED display, through to determine the corresponding music player keys to enter the treatment program. Procedures in the music player, use the timer/counter 2 counter 8253 to work in the way ? ? 3- square-wave generator, followed by out music through the look-up table values into the counter as a frequency count of the initial value, the output side out2 waves, driven loudspeakers of different frequency sound, in between each scale by adding the appropriate delay time, namely, the realization of the music player.

一个简单的linux下的服务端，有什么问题请多指教！-a simple service under linux-and what problems it should improve!