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[认领] 20210611 How to use the FreeDOS text editor
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[#]: subject: (How to use the FreeDOS text editor)
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[#]: via: (https://opensource.com/article/21/6/freedos-text-editor)
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[#]: author: (Jim Hall https://opensource.com/users/jim-hall)
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[#]: collector: (lujun9972)
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[#]: translator: ( )
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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How to use the FreeDOS text editor
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======
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FreeDOS provides a user-friendly text editor called FreeDOS Edit.
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![Person using a laptop][1]
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Editing files is a staple on any operating system. Whether you want to make a note about something, write a letter to a friend, or update a system configuration file—you need an editor. And FreeDOS provides a user-friendly text editor called (perhaps unimaginatively) "FreeDOS Edit."
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### Editing files
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The simplest invocation of FreeDOS Edit is just `EDIT`. This brings up an empty editor window. The patterned background suggests an empty "desktop"—a reminder that you aren't editing any files.
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![FreeDOS Edit][2]
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FreeDOS Edit without any files loaded
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Jim Hall, CC-BY SA 4.0
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Like most DOS applications, you can access the menus in Edit by tapping the Alt key once on your keyboard. This activates the menu. After hitting Alt, Edit will switch to "menu" access and will highlight the "File" menu. If you want to access a different menu on the menu bar, use the left and right arrow keys. Press the down arrow or hit the Enter key to go "into" the menu.
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![FreeDOS Edit menu][3]
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Highlighting the menu
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Jim Hall, CC-BY SA 4.0
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Do you notice that the first letter for each menu title is a different color? This highlight indicates a shortcut. For example, the "F" in the "File" menu is highlighted in red. So you could instead press Alt+F (Alt and F at the same time) and Edit will bring up the "File" menu.
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![File menu][4]
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The File menu
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Jim Hall, CC-BY SA 4.0
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You can use the "File" menu to either start a new (empty) file, or open an existing file. Let's start a new file by using the arrow keys to move down to "New" and pressing the Enter key. You can also start a new file by pressing Ctrl+N (Ctrl and N at the same time):
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![new file][5]
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Editing a new file
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Jim Hall, CC-BY SA 4.0
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Editing files should be pretty straightforward after that. Most of the familiar keyboard shortcuts exist in FreeDOS Edit: Ctrl+C to copy text, Ctrl+X to cut text, and Ctrl+V to paste copied or cut text into a new location. If you need to find specific text in a long document, press Ctrl+F. To save your work, use Ctrl+S to commit changes back to the disk.
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### Programming in Edit
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If you're a programmer, you may find the extended ASCII table a useful addition. DOS systems supported an "extended" ASCII character set commonly referred to as "code page 437." The standard characters between 0 and 127 include the letters A through Z (uppercase and lowercase), numbers, and special symbols like punctuation. However, the DOS extended characters from code 128 to code 255 included foreign language characters and "line drawing" elements. DOS programmers often made use of these extended ASCII characters, so FreeDOS Edit makes it easy to view a table of all the ASCII codes and their associated characters.
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To view the ASCII table, use the "Utilities" menu and select the "ASCII Table" entry. This brings up a window containing a table.
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![utilities menu - ascii table][6]
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Find the ASCII Table in the Utilities menu
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Jim Hall, CC-BY SA 4.0
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Along the left, the table shows the hexadecimal values "00" through "F0," and the top shows the single values "0" through "F." These provide a quick reference to the hexadecimal code for each character. For example, the item in the first row (00) and the first column (0) has the hexadecimal value 00 + 0, or 0x00 (the "NULL" value). And the character in the fifth row (40) and the second column (1) has the value 40 + 1, or 0x41 (the letter "A").
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![utilities menu - ascii table][7]
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The ASCII Table provides a handy reference for extended characters
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Jim Hall, CC-BY SA 4.0
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As you move the cursor through the table to highlight different characters, you'll see the values at the bottom of the table change to show the character's code in decimal, hexadecimal, and octal. For example, moving the cursor to highlight the "line intersection" character at row C0 and column 5 shows this extended character code as 197 (dec), 0xc5 (hex), and 305 (oct). In a program, you might reference this extended character by typing the hex value `0xc5`, or the octal "escape code" `\305`.
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![ASCII 0xc5][8]
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The "line intersection" character is 197 (dec), 0xc5 (hex), and 305 (oct)
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Jim Hall, CC-BY SA 4.0
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Feel free to explore the menus in Edit to discover other neat features. For example, the "Options" menu allows you to change the behavior and appearance of Edit. If you prefer to use a more dense display, you can use the "Display" menu (under "Options") to set Edit to 25, 43, or 50 lines. You can also force Edit to display in monochrome (white on black) or reversed mode (black on white).
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--------------------------------------------------------------------------------
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via: https://opensource.com/article/21/6/freedos-text-editor
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作者：[Jim Hall][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://opensource.com/users/jim-hall
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[b]: https://github.com/lujun9972
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[1]: https://opensource.com/sites/default/files/styles/image-full-size/public/lead-images/laptop_screen_desk_work_chat_text.png?itok=UXqIDRDD (Person using a laptop)
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[2]: https://opensource.com/sites/default/files/uploads/edit.png (FreeDOS Edit without any files loaded)
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[3]: https://opensource.com/sites/default/files/uploads/edit-menu.png (Highlighting the menu)
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[4]: https://opensource.com/sites/default/files/uploads/edit-file.png (The File menu)
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[5]: https://opensource.com/sites/default/files/uploads/edit-new.png (Editing a new file)
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[6]: https://opensource.com/sites/default/files/uploads/utilities-ascii.png (Find the ASCII Table in the Utilities menu)
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[7]: https://opensource.com/sites/default/files/uploads/ascii-table-0x00.png (The ASCII Table provides a handy reference for extended characters)
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[8]: https://opensource.com/sites/default/files/uploads/ascii-0xc5.png (The "line intersection" character is 197 (dec), 0xc5 (hex), and 305 (oct))
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@@ -0,0 +1,95 @@
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[#]: subject: (How to use the FreeDOS text editor)
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[#]: via: (https://opensource.com/article/21/6/freedos-text-editor)
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[#]: author: (Jim Hall https://opensource.com/users/jim-hall)
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[#]: collector: (lujun9972)
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[#]: translator: (yjacks)
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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如何使用FreeDOS Edit
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======
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FreeDOS提供了一个叫做 FreeDOS Edit 的用户友好的文本编辑器
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![Person using a laptop][1]
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在任何操作系统中，编辑文件都是一项常有的任务。当你想去做一个某事的笔记、写封信给朋友或升级一个系统配置——你需要一个文本编辑器。FreeFOS提供了一个用户友好的文本编辑器（也许你难以想象）叫做”FreeDOS Edit。“
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### 编辑文件
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最简单的启用 FreeDOS Edit 的方式就只是`EDIT`。它提供一个空的编辑器窗口。图案背景显示为一个空的“桌面”——提醒您没有编辑任何文件。
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![FreeDOS Edit][2]
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FreeDOS Edit未加载任何文件
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Jim Hall, CC-BY SA 4.0
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就像多数 DOS 程式，你可以轻击你键盘上的 Alt 键一次来启动菜单。这将激活这个菜单。在你轻击 Alt 后，编辑器将转为“menu”并将高亮“File”菜单。如果你想要启用一个别的菜单从菜单栏上，使用左与右方向键。按下下方向键或击打回车键去“进入”菜单。
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![FreeDOS Edit menu][3]
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高亮菜单
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Jim Hall, CC-BY SA 4.0
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你注意到所有菜单标题的第一个字母是不同的颜色么？高亮字母显示了一条捷径。例如，"F"在"File"菜单高亮为红色。所以你可以通过按下 Alt+F (Alt 和 F 在同一个瞬间），编辑器会显示“File”菜单。
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![File menu][4]
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文件菜单
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Jim Hall, CC-BY SA 4.0
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你可以使用“File”菜单来原则开始一个新（空）文件，或打开一个存在的文件。让我们开始一个新文件使用方向键移动到“New“然后按下回车键。你也可以用 Ctrl+N （Ctrl 和 N 在相同的时间）启动一个新文件。
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![new file][5]
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编辑一个新的文件
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Jim Hall, CC-BY SA 4.0
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在那之后编辑文件应该非常简单。大多快捷键都存在于 FreeDOS 中。编辑器：Ctrl+C以复制文本，Ctrl+X 以剪贴文本，和 Ctrl+V 以粘贴复制的或剪贴的文本到新的地方。如果你需要寻找一个特殊文本在一个长文档中，按 Ctrl+F。保存你的工作成果，使用 Ctrl+S 以推送变更回到硬碟。
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### 编辑器中的编程
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如果你是个程序员，你也许需要寻找 ASCII 拓展表——一个有用的拓展。DOS 系统支援一个”拓展的“ASCII字符集通常援引自“code page 437.”。标准的字符包含字母 A 到 Z(大写与小写）、数字和特殊字符像是标点符号。但是，DOS 拓展字符自编码 128 到编码 255 包含拉丁语言字符和“行绘画”元素。DOS 程序员有时需要使用这些拓展 ASCII 字符，所以 FreeDOS Edit 将它变得简单去检视一个表表示所有 ASCII 码和它们的相关字符。
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查看 ASCII 表，请使用“工具”菜单，选择“ASCII表”选项，这将显示一个窗口包含一个表。
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![utilities menu - ascii table][6]
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找寻 ASCII 表在工具菜单
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Jim Hall, CC-BY SA 4.0
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沿着左边，这张表显示十六进制值"00"到"F0"，顶部展示值“0”到“F”。这提供一个快速的十六进制码参考予每个字符。例如，在第一行（00）和第一列（0）的东西为值 00+0，或者说 0x00（“NULL”值）。字符在第五行（40）和第二列（1）的值为40+1，或者说0x41（字母“A”）。
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![utilities menu - ascii table][7]
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ASCII 表提供一个易用的参考予扩展字符
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Jim Hall, CC-BY SA 4.0
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当你移动光标通过表去高亮不同的字符，你见到值在表的中间变化来展示字符的十进制、十六进制和八进制编码。例如，移动光标以高亮“线路交点”字符在C0行和列5展示拓展的字符值为 197（十进制）、0xc5（十六进制）和 305（八进制）。再一个程序中，你也许参考这些拓展字符以输入十六进值`0xc5`，或者十进制“转译码”`\305`。
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![ASCII 0xc5][8]
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“线路交点”字符是 197（十进制）、0xc5（十六进制）和 305（八进制）
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Jim Hall, CC-BY SA 4.0
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请随意浏览Edit中的菜单，以发现其他简洁的功能。例如，“选项”菜单允许您更改编辑的行为和外观。如果您喜欢使用更密集的显示，可以使用“显示”菜单（在“选项”下）将“编辑”设置为 25、43或 50 行。您还可以强制编辑以单色（黑底白字）或反转模式（白底白字）显示。
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--------------------------------------------------------------------------------
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via: https://opensource.com/article/21/6/freedos-text-editor
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作者：[Jim Hall][a]
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选题：[lujun9972][b]
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译者：[yjacks](https://github.com/yjacks)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://opensource.com/users/jim-hall
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[b]: https://github.com/lujun9972
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[1]: https://opensource.com/sites/default/files/styles/image-full-size/public/lead-images/laptop_screen_desk_work_chat_text.png?itok=UXqIDRDD (Person using a laptop)
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[2]: https://opensource.com/sites/default/files/uploads/edit.png (FreeDOS Edit without any files loaded)
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[3]: https://opensource.com/sites/default/files/uploads/edit-menu.png (Highlighting the menu)
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[4]: https://opensource.com/sites/default/files/uploads/edit-file.png (The File menu)
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[5]: https://opensource.com/sites/default/files/uploads/edit-new.png (Editing a new file)
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[6]: https://opensource.com/sites/default/files/uploads/utilities-ascii.png (Find the ASCII Table in the Utilities menu)
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[7]: https://opensource.com/sites/default/files/uploads/ascii-table-0x00.png (The ASCII Table provides a handy reference for extended characters)
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[8]: https://opensource.com/sites/default/files/uploads/ascii-0xc5.png (The "line intersection" character is 197 (dec), 0xc5 (hex), and 305 (oct))
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