Special edition using MS-DOS 6.22 by Jim Cooper

By Jim Cooper

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2. BAT File Command Meaning @ECHO OFF Suppresses the display of the commands as they are processed. ) Part CLS Clears the screen. Ch PROMPT $P$G Alters the way the DOS prompt is displayed. The $P$G portion of the line causes the prompt to show the currently logged drive and path, followed by a greater-than sign (>). You can use the PROMPT command to turn the DOS prompt into anything you want it to be. To learn how to change the look of the command prompt, see “Changing the Command Prompt with PROMPT” in Chapter 11, p.

Are represented in a literal way. EXE, you first must type the command name CHKDSK. Any literal text (text you type letter for letter) in a syntax line appears in UPPERCASE letters. Any variable text (text that acts as a placeholder for other text) is shown in lowercase italic letters. 7 8 Introduction The conventions used for syntax lines in the “Command Reference” are slightly different from those used in the chapters of this book. Refer to the section “The Conventions Used in This Command Reference” near the beginning of Appendix F for more information on how syntax lines are presented in that section.

Therefore, a method is needed to store this information and make it available to the CPU. To store information, your computer typically uses three kinds of memory: ■ Random access memory (RAM) ■ Read-only memory (ROM) ■ Disk-based storage Each type of memory plays a different role in your system. Random access memory, or RAM for short, is a volatile form of memory. Volatile means that it can hold information only when electrically powered. If you turn off the power, all the information stored in RAM chips is lost.

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