EM78P447奏乐，利用定时计时器控制P70脚，输出一段音乐。

按键扫描,有很多系统都用到按键控制操作,按键扫描功能的程序是不可小的.-Buttons to scan, there are many systems used to control the operation buttons, button scanning procedure can not be small.

运用汇编实现简易的4位加减乘除计算器，通过硬件课程实践，证明代码的有效性，并且，在确认键值的方法上有更新的方法，值得参考借鉴。

单片机数字电压表汇编程序.希望大家分享哦-Single-chip digital voltage meter assembler. Hope that we share Oh

汇编课程设计显示彩色矩形块-compilation curriculum design rectangular blocks of color show

AD程序，方便大家调试。特简单，用AD0804-AD procedures, to facilitate debugging U.S.. Special simple, using AD0804

手机中用的I2C代码,包含GPIO口说明-phone using I2C code, the oral statement contains GPIO

dos 底层原理资料，和内核结构说明，想了解dos的编程的或许有用的哦-dos underlying principles of information, and the core structure that would like to know the dos programming, perhaps, useful Oh

此驱动程序不同网上流通的驱动,是具有时用性,可移值性相当高,是真正能使用的驱动子程序!程序中宏定义很清楚-this driver online circulation of different drive is used, can shift relatively high value property, really use the driver subroutine! Acer process definition is very clear

内联汇编 直接操作winio驱动写io模拟鼠标键盘-Inline assembly winio directly mouse-driven simulation of a keyboard to write io

240*128LCM测试程序，完全可用。240*128LCM测试程序，完全可用-240* 128LCM test procedure and it is perfectly possible. 240* 128LCM test procedure and it is perfectly possible