【文件格式是Linux下的gz压缩包,在Windows下可以用WinRAR解压】 本人原创的操作系统上机作业(源代码),自己编写一个简单的Linux下的shell(a simple myshell)!原题见William Stallings写的《Operating Systems - Internals and Design Principles》(操作系统--内核与设计原则): The shell must support the following internal commands: cd - change the current default directory to . If the argument is not present, report the current directory. If the directory does not exist an appropriate error should be reported. This command should also change the PWD environment variable. clr - clear the screen. dir - list the contents of directory environ - list all the environment strings echo - display on the display followed by a new line (multiple spaces/tabs may be reduced to a single space) help - display the user manual using the more filter pause - pause operation of the shell until 'Enter' is pressed quit - quit the shell The shell environment should contain shell=/myshell where /myshell is the full path for the shell executable (not a hardwired path back to your directory, but the one from which it was executed)
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常见系统有802S/C系统、802D系统、810D系统和840D系统。其中,西门子802S/C系统是西门子公司专门针对中国用户开发的一款系统。目前西门子系统在中国市场得到了广泛的应用,西门子840D更是以高端系统出现。
2019-12-21 18:56:12 1.6MB 数控编程
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IAR EWARM V5嵌入式系统应用编程与开发 光盘源码 徐爱钧
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