摘要：J2ME是SUN公司最新推出的面向嵌入式产品的JAVA，目前市场上刚刚推出采用J2ME工具开发的手机和PDA产品，本文介绍了J2ME的特点和技术，分析了J...

A user-space device driver can do many of the things that kernel drivers can t, such as perform a long-running computation, block while waiting for an event, or read files from the file system. Unlike kernel drivers, a user-space device driver can use other device drivers--that is, access the network, talk to a serial port, get interactive input from the user, pop up GUI windows, or read from disks. User-space drivers implemented using FUSD can be much easier to debug it is impossible for them to crash the machine, are easily traceable using tools such as gdb, and can be killed and restarted without rebooting even if they become corrupted. FUSD drivers don t have to be in C--Perl, Python, or any other language that knows how to read from and write to a file descriptor can work with FUSD. User-space drivers can be swapped out, whereas kernel drivers lock physical memory.-A user-space device driver can do many of the things that kernel drivers can t, such as perform a long-running comput

WINDOS2000下不需要弹出对话框，直接自动关机或者重新启动-WINDOS2000 pop-up dialog box under no direct automatic shutdown or restart

Wince对CPU寄存器的直接读写 方便驱动开发的朋友调试开发

环形队列，经过测试通过，很好用，可以增加，可以减少,FIFO-Circular queue, after the test is passed, good use can be increased, can be reduced, FIFO

操作系统课程设计设计文档题目一的内容实现UP、DOWN原语产生3个进程：两个进程模拟需要进入临界区的用户进程。当需要进入临界区时，显示：“进程x请求进入临界区…”，同时向管理进程提出申请；申请返回，表示进入了临界区。在临界区中等待一段随机时间，并显示：“进程x正在临界区…”；当时间结束，显示：“进程x退出临界区…”,同时向管理进程提出退出申请；当申请返回，显示：“进程x已退出临界区。”一个进程作为原语的管理进程，接受其他进程的临界区进入请求：如果允许进入，则根据DOWN 原语的操作步骤设置相应变量，然后返回； 如果不允许进入，则进入循环等待，直到允许为止； 退出时模拟UP 操作。 进程间通信可以采用信号、消息传递、管道或网络通信方式。-Operating system design documents subject curriculum design content of the UP, DOWN primitives have three process

c语言的小编译器,学习的好东东.-small c language compiler, a good learning Wanton.

按钮种类，可以看到各种各样的颜色，还可以透明-Button type, we can see a variety of colors, can also be transparent

一个完整的GUI界面OS,单盘启动 实现了多线程、FAT32文件读写，GUI图形界面-a complete OS GUI interface, single-disk realized multiple threads, FAT32 file read and write, GUI graphical interface

cpu的使用状况编程,效果根windows的一样好-cpu of the use of programming and the results-as good as the windows

1)  超级可以移植性，与CPU无关，几乎任何支持C语言编程的CPU都可以用！（本文仅仅以51单片机为例而已，但实际上可以任意移植） 2)  小之又小， 原理很简单，一看就懂。 3)  省之又省， 可以说对RAM和ROM省到极致。 4)  取protothread之精华，将定时器与状态机和伪线程语法融合到一个框架，任务函数可以有两种写法。 5)  基于定时器触发，调度效率高，最大化减少无效的代码运行时间。