This is a simulation of serial IO port, using a program written in assembly code...

从软盘启动计算机，并且可以显示时钟，按键可以改变屏幕颜色-your computer from a floppy disk, and can display clock, screen buttons can change color

C51 LCD Keyboard driver

还是汇编语言编的asm to vxd例子-or assembly language series asm example to vxd

用8251a实现串行口异步通信，自发自收，波特率1200bps，采用查询方式发送，中断方式接受。自收结果显示于屏幕。按esc返回dos -8251a Serial port with asynchronous communication, spontaneous self-income, the baud rate 1200bps, using queries sent, interrupt to receive treatment. Since the close results showed on the screen. Press esc to return dos

汇编实现的接口8251编程  一个很好用的代码  上课实验时写的

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串口调试助手源程序,对一些学语言编程的有些帮助！-serial debugging assistant source of some programming language learning some help!

本档含详细的电路原理、源程序，AT89C51主控，利用车辆检测器不仅可开发电子警察，还可开发出如：自动显示泊车数的停车场，实时配时的路口信号机系统，自动车库，交通车流量计数器等。-The file containing detailed circuit principle, source, AT89C51 master the use of vehicle detector electronics can be developed not only the police, but also developed such as: automatically displays the number of parking spaces car park, with real-time signal at the junction system, automatic garage, traffic flow, such as counters.

This a simple white noise generator written in asm for pic16f73, but it can be easily modified for other pics-This is a simple white noise generator written in asm for pic16f73, but it can be easily modified for other pics...

ex6_1 ～ ex6_3二项分布的随机数据的产生 ex6_4 ～ ex6_6通用函数计算概率密度函数值 ex6_7 ～ ex6_20常见分布的密度函数 ex6_21 ～ ex6_33随机变量的数字特征 ex6_34 采用periodogram函数来计算功率谱 ex6_35 利用FFT直接法计算上面噪声信号的功率谱 ex6_36 利用间接法重新计算上例中噪声信号的功率谱 ex6_37 采用tfe函数来进行系统的辨识，并与理想结果进行比较 ex6_38 在置信度为0.95的区间上估计有色噪声x的PSD ex6_39 在置信度为0.95的区间上估计两个有色噪声x，y之间的CSD ex6_40 用程序代码来实现Welch方法的功率谱估计 ex6_41 用Welch方法进行PSD估计，并比较当采用不同窗函数时的结果 ex6_42 用Yule-Walker AR法进行PSD估计 ex6_43 用Burg算法计算AR模型的参数 ex6_44 用Burg法PSD估计 ex6_45 比较协方差方法与改进的协方差方法在功率谱估计中的效果 ex6_46 用Multitaper法进行PSD估计 ex6_47 用MUSIC法进行PSD估计 ex6_48 用特征向量法进行PSD估计-ex6_1 ~ ex6_3 binomial distribution of the generated random data ex6_4 ~ ex6_6 generic function value of the probability density function ex6_7 ~ ex6_20 common distribution density function ex6_21 ~ ex6_33 figure characteristics of random variables periodogram function ex6_34 used to calculate the power spectrum ex6_35 direct method using FFT signal above the noise of the power spectrum ex6_36 recalculated