prepared with the message boards, good Dongdong

这是一个无线遥控发射芯片的解码源程序，希望大家借鉴使用-This is a wireless remote control to launch source decoder chips, I hope everyone from the use of

此程序为KEIL环境下开发的代码（开发环境备选里没有KEIL），功能在成功运行后可以播放“生日快乐”歌。所需要的开发硬件为AT89C51为主芯片的单片机。-This program is developed under the code in KEIL environment (development environment, where there is no alternative KEIL), features a successful running play " Happy Birthday" song. Required the development of hardware-based chip microcontroller AT89C51.

定时闹钟的一个简单实用的程序，可以对现在时间以及闹钟时间进行修改．-Regular alarm clock, a simple and practical procedures, the time now, and can modify the alarm time.

1. 通过汇编语言程序设计进一步掌握80x86指令系统。 2. 掌握汇编语言程序设计方法，包括：分支、循环、子程序、宏、结构和记录等的设计-1. Through the assembly language program designed to further understand the 80x86 instruction set. 2. To master assembly language programming, including: branch, loop, subroutine, macro, structure and records of the design

LCD显示,能够滚动显示数字频率,按键的号码

晶振采用6M，P1口为数码管段输出口，P3.0~P3.2为数码管位输出口，P3.5超声波发送输出，P3.7超声波接收。

电动广告灯箱控制器程序，实现定时打开，可设置画面停留时间，等功能。-Electric advertising light box controller procedures, timing realize open, the screen can be set up residence time, and other functions.

汇编语言程序设计入门学习，学习汇编语言的好教材-assembly entry

一个实用子程序――看门狗,存储器与 89C2051接口子程序-a practical subroutine-- watchdog, memory and interface subroutine 89C2051

io bios ziyuan xia zai -io bios ziyuan xia zai