Flash存储器又称闪存，它结合了ROM和RAM的长处，不仅具备电子可擦除可编程（EEPROM）的性能，还可以快速读取数据（NVRAM的优势），使数据不会因为断电而丢失。U盘和MP3里用的就是这种存储器。在过去的20年里，嵌入式系统一直使用ROM（EPROM）作为它们的存储设备，然而近年来Flash全面代替了ROM（EPROM）在嵌入式系统中的地位，用作存储Bootloader以及操作系统或者程序代码
Flash memory also known as flash, it combines the strengths of ROM and ram, not only have the electronic erasable programming (EEPROM) performance, but also can quickly read data (NVRAM), so that the data is not lost due to power outages. This kind of memory is used in the U disk and MP3. In the past 20 years, embedded system has been using ROM (EPROM) as their storage devices. However, in recent years, flash instead of a comprehensive ROM (EPROM) position in embedded system, used for storage of bootloader and operating system or program code, or directly when the use of hard disk (2016-05-05, TEXT, 1KB, 下载1次)
模拟示波器采用的是模拟电路（示波管，其基础是电子枪）电子枪向屏幕发射电子,发射的电子经聚焦形成电子束,并打到屏幕上。屏幕的内表面涂有荧光物质,这样电子束打中的点就会发出光来。
数字示波器则是数据采集，A/D转换，软件编程等一系列的技术制造出来的高性能示波器。数字示波器一般支持多级菜单，能提供给用户多种选择，多种数据分析功能，并且可以数据存储，实现对波形的保存和处理。
Analog oscilloscope is used in the analog circuit (CRT, which is based on the electron gun) the electron emission of the electron gun to the screen, the electrons emitted by the focused electron beam is formed, and hit on the screen. The inner surface of the screen coated with a fluorescent substance, so that the electron beam hitting the point will emit light. The digital oscilloscope is a high-performance data acquisition, A/D conversion, software programming, and a series of technology created by the oscilloscope. Digital oscilloscope generally support multi-level menu, can provide a variety of options to users, a variety of data analysis functions and data storage, preservation and processing of waveform. (2012-09-19, TEXT, 478KB, 下载17次)
用keil 实现的基于stc12c5a16s2的一个51单片机的简易操作系统，可同时运行相互独立的带延时功能的多个任务。该设计占用一个定时器，占用0x7f~0xff的内存空间作为所运行任务的栈。
文件包括了整个工程所需要的全部文件，不过要正常运行，还需要对keil进行一些设置，主要是c与汇编混合的问题，可自己上网查询
Keil to achieve a 51-MCU-based stc12c5a16s2 simple operating system, which can run independent of each other more than one task with a delay function. The design occupies a timer, take up memory space 0x7f ~ 0xff as the stack of the running tasks. The documents include all the documents needed by the whole project, but to run properly, but also need some settings on keil c and assembly, can be online (2012-06-26, TEXT, 70KB, 下载45次)
软件质量是被大多数程序员挂在嘴上而不是放在心上的东西！
除了完全外行和真正的编程高手外，初读本书，你最先的感受将是惊慌：“哇！我以前捏造的C++/C程序怎么会有那么多的毛病？”
别难过，作者只不过比你早几年、多几次惊慌而已。
请花一两个小时认真阅读这本百页经书，你将会获益匪浅，这是前面N-1个读者的建议
Software quality is lip service by most programmers not mind things! In addition to complete layman and true master of programming, the first reading of the book, you feel will be the first to panic: " wow! I had fabricated C++/C program how would there be so many problems?" Do not be sad, of more than just you a few years ago, more than just a few panic. Please take an hour or two hundred pages read by this book, you will benefit, which is N-1 in front of the recommendations of readers (2010-12-31, TEXT, 49KB, 下载3次)
这事一段史上最强的汇编代码，(据说是XXX编程大赛的冠军作品)。本人试了一下，确实强大。
你只要在运行里边输入cmd 回车 输入 debug<文件路径
例如：debug<e:\ttt.txt 就会在同一个目录下生成一个BMY.COM 的文件双击运行看会出现什么。注:就对没毒
The strongest in the history of this matter for some assembly code, (is said to be the champion contest XXX programming works). I tried it, was powerful indeed. You just type cmd in the run inside the carriage return input debug < file path such as: debug <e:\ttt.txt 就会在同一个目录下生成一个BMY.COM 的文件双击运行看会出现什么。注:就对没毒 (2010-02-06, TEXT, 6KB, 下载6次)
汇编程序
1.1编写一程序，作BCD数的四则运算，在程序中设置非压缩BCD数X，从键盘输入一位十进制数Y。将X+Y、X－Y、X＊Y及X/Y（不考虑余数）分别送ANS＿A，ANS＿S，ANS＿M及ANS＿D变量。
1.2编写一程序，实现两个三字节无符号数DATA1和DATA2的相加，结果送四字节变量ANS。
Assembler program to prepare a 1.1 for the number of BCD arithmetic, the procedure set up in non-compressed BCD number X, from the keyboard input of a decimal number of Y. Will be X+ Y, X-Y, X* Y and X/Y (not considering more than a few) were sent to ANS_A, ANS_S, ANS_M and ANS_D variables. 1.2 to prepare a program to achieve two three-byte unsigned number of DATA1 and DATA2 sum, the results sent to four-byte variable ANS. (2009-06-18, TEXT, 1KB, 下载14次)
asp 面向对象编程的通用类.我的经典收藏,虽然我不是专业开发asp的,但有时候会用到.这个文件是我们公司以前开发人员花一个月时间整理出来的.绝对有价值.包含了asp 缓存类,数据库类,文件操作类,邮件类等等,包含了几乎所有的已知的公共类。重点推荐
asp object-oriented programming generic category. My collection of classical, although I am not a professional development asp. But sometimes be used. This document is the development of our company staff have spent the past month out of time to sort out. absolute value . Cache contains asp category, the database category, the paper operations, mail, etc. category, includes almost all the known public category. Suggested priorities (2007-04-20, TEXT, 19KB, 下载15次)
按键输入模块（key）：
--可编程延时发生器（数字同步机）的前端输入模块：0－9十个数字键按键输入模块原型
--前端模块：消抖
--对i0－i9十个输入端的两点要求：
--（1）输入端要保证一段时间的稳定高电平
--（2）不能同时按下两个或多于两个的键
--后级模块：1、编码；2、可变模计数器
--编码模块：8线－4线（0－8 BCD码）
--可变模计数器模块：以编码模块输出的32位BCD码为模值
button input module (key) :-- programmable delay generator (digital synchronous machine) the front-end input module : 0-2-9 10 numeric keys keys input module prototype-- front-end module : Consumers quiver-- the domain-Makes 10 input of the two requirements :-- (a) input to ensure a period of stability to I-- (2) can not be pressed together two or more two keys-- after class modules : one, coding; 2, variable Die counter-- Coding modules : 8-to-four (0-8 BCD)-- Variable Mode counter modules : coding module output to the 32 BCD value to Die (2005-09-01, TEXT, 2KB, 下载50次)