实现2 * 2键盘扫描，用于扫描扫描方式的行列

数字频率调制又称频移键控（FSK），二进制频移键控记作2FSK。数字频移键控是用载波的频率来传送数字消息，即用所传送的数字消息控制载波的频率。2FSK信号便是符号“1”对应于载频，而符号“0”对应于载频（与不同的另一载频）的已调波形，而且与之间的改变是瞬间完成的。 -Digital frequency modulation called frequency shift keying (FSK), binary frequency shift keying recorded as 2FSK. Digital frequency-shift keying is the carrier frequency to transmit digital information, that is, the number of messages transmitted with the control of the carrier frequency. 2FSK signal is the symbol of "1" corresponds to the carrier frequency, while the symbol "0" corresponds to the carrier frequency (with a different carrier frequency to another) and modulated waveform, but also between the change was instantaneous.

模拟德国六级轨道不平顺的程序，希望对大家有用！-German 6 Track Irregularity simulation program, hoping for all of us!

a second python program.

字符串字符分类排序-Sort string of characters

程序在masm5.0下编译通过,望大家有什么问题或看法能与我联系讨论，我的email:xiangyuan_122@163.com-the programme will be finished under masm5.0,please keep touch with me if you have some problems and suggestions. My Email address is xiangyuan 122@163.com

用汇编写的弹砖块游戏，320x200x256模式。左右键控制挡板。打中不同的砖块会有不同的效果。当前目录下有一个map.txt的文件，用来存放砖块的排列。注：在XP下，可能显示有一定问题。-compilation was made with the bricks at the game, 320x200x256 model. About baffle control keys. Hit the bricks have different results. Current directory is a map.txt documents were used to store the bricks with. Note : In XP, it may indicate that certain problems.

这是一个Led条屏的文字流水汇编程序源码，笔者早年的所写，流水速度非常快，是该类程序中的经典之作。对做条屏的朋友是个很好的参考。-This is a Led screen text article assembler source water, the author writes of his early years, very fast flowing water is of such proceedings classic. Article on screen make friends is a good reference.

清理垃圾，大家可以下载到机子，可以帮助你清理机子垃圾-Cleaning up litter and everyone can be downloaded to the machine, I can help you clean up garbage loom

用汇编写的哦!其他也没什么说的，只是他一定要20个字，没办法拉-compilation was made with the Oh! Others have nothing to say is that he must 20 characters, not to pull the ball! !

利用DS18B20温度传感器+AT89C51控制直流电机转速，-The use of DS18B20 temperature sensor+ AT89C51 control DC motor speed,