Enhancement-for-OS-ELM

说明：  北理工操作系统课程设计实验3 生产者消费者实验的源码及实验报告(North Polytechnic courses on operating system design Experiment 3 of producers and consumers experiment source code and experimental reports)

ios Mac os programming

页式虚拟存储器的页面置换算法一般有： 最佳置换算法（OPT），先进先出置换算法（FIFO），最近最久未使用置换算法（LRU），Clock置换算法，最少使用置换算法（LFU），页面缓存算法（PBA）等。 先进先出（FIFO）置换算法是最直观的置换算法，由于它可能是性能最差的算法，故实际应用极少。在这里我只使用前面三种算法来进行页面调度(Page replacement algorithms for page virtual memory generally include the best permutation algorithm (OPT), advanced first out permutation (FIFO), the most recent unused replacement algorithm (LRU), Clock permutation algorithm, minimum use of permutation (LFU), and page caching algorithm (PBA). The first in first out (FIFO) replacement algorithm is the most intuitive replacement algorithm, because it may be the worst performing algorithm, so there are few practical applications. Here I only use the first three algorithms for page scheduling.)

说明：  主存空间的分配和回收的作业，做的不错的，大家自己调整吧~~(Main memory space allocation and recovery operations, to do good, everybody make their own adjustments ~ ~~)

dos 工具 用老版本的gcc编译，否则会出错(dos tools with older versions of THING)

ThixOS kernel full source code

银行家算法模拟程序的实现 用可视（图形）化界面完成银行家算法的模拟程序。 模拟程序能够实现对不同数目进程，不同数目资源种类，不同当前状态的测试，通过银行家算法判断任意次数的资源请求是否会得意满足，并对提出资源请求的进程作出正确处理。 模拟程序还需要能够正确回收资源，并在回收资源后判断是否需要唤醒阻塞进程，如需要则将先前因申请资源失败而被阻塞的进程唤醒，并提供资源分配(Bankers algorithm simulation program realization )

操作系统定时刷新功能，利用TIMER定时器定时后调用系统刷新功能，可做到计算机自动刷新、开机启动，并可设置刷新间隔时间并存档。(Operating system timing refresh function, using TIMER timer to call system refresh function after timing, can automatically refresh the computer, start, and set refresh interval time and archive.)

contiki是开源的，可移植的，针对存储空间受限的网络化嵌入式系统和无线传感器网络的多任务操作系统。(Contiki is an open source, highly portable, multi-tasking operating system for memory-efficient networked embedded systems and wireless sensor networks. Contiki has been used is a variety of projects, such as road tunnel fire monitoring, intrusion detection, water monitoring in the Baltic Sea, and in surveillance networks. )

Microsoft MS-DOS6.0 完整源代码，包括所有外部命令，安装程序，DOSSHELL等。每个源文件均包括开发历史、更新说明、注释。这样一套源码对你的意义，实在无法以笔墨形容(Microsoft the MS-DOS6.0 complete source code, including all external commands, the installation procedure, DOSSHELL and so on. Each source document includes the development history, the renewal explanation, the annotation. This kind of set of sources code to your significance, really is unable to the words to describe )