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通过汇编语言，采用 8253/8254 的 CNT2 控制扬声器，演奏音乐。(Assembly language, using the 8253/8254 of the the CNT2 control speaker to play music.)

A/D测试首先对A/D模块进行初始化操作，当A/D不忙时，进行A/D转化，A/D转化完毕产生中断，并将结果存入数组中。-A/D test first A/D module to initialize the operation, when the A/D not busy when conducting A/D conversion, A/D conversion completion interrupt generated, and the results into the array.

C8051 rtl的汇编驱动程序，如果能看懂会给你带来很大的好处，学习的好资料.-The driver of C8051 rtl, it will bring you very big benfit if you will read it, it is very nice.

一款移动电源方案源程序代码，测试OK，已经批量生产！(A mobile power program source code, test OK, now in mass production!)

x86汇编程序教程，从基础开始，讲解详细，内容丰富，适合初学者( a book for newer to learn x86 asm)

ASCII码转换成十六进制数 ,单字节ＢＣＤ码小数转换成单字节十六进制小数,双字节十六进制小数转换成双字节ＢＣＤ码小数,单字节十六进制数转换成双字节ASCII码 -ASCII conversion into hexadecimal number, single-byte BCD decimal converted into single-byte hexadecimal minority. double-byte hexadecimal decimal converted into double byte BCD minority. single-byte hexadecimal number into double byte ASCII, etc.

Dos下屏蔽热启动,想要重启的话先按下Ctrl+Alt+Del，松开Del键，然后按R键则重 启，按Q键则关机-Dos under thermal shielding started, and wanted to resume the first pressing Ctrl-Alt-Del, loosen Del keys, then R button will resume by Q keys were shutdown

基于单片机控制的电子密码锁 摘要：本系统由单片机系统、矩阵键盘、LED显示和报警系统组成。系统能完成开锁、超时报警、超次锁定、管理员解密、修改用户密码基本的密码锁的功能。除上述基本的密码锁功能外，还具有调电存储、声光提示等功能，依据实际的情况还可以添加遥控功 -Based on MCU-controlled electronic code locks Abstract: This system consists of single-chip microcomputer system, matrix keyboard, LED display and alarm system. System to complete the unlock, overtime alarm, lock超次, administrators decrypt, modify the user s password locks the basic functions. In addition to the above basic code lock function, but also has a transfer electric storage, sound and light features such as tips, according to the actual situation can also add a remote control reactive

DOS 6.22 的源代码，汇编语言写的 ，应该对大家有用的。(DOS 6.22 of source code, written in assembly language, it should be useful to everyone.)

基于abaqus软件，采用fortran 编程软件的计算公路路面温度场子程序计算(TEMPERATURE USERSOBLINE)