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Chapter 19. Configuring Your Computer > Understanding Device Drivers

Understanding Device Drivers

MS-DOS certain features that every DOS user needs. Regardless of the type of computer you use or the software you run, you must be capable of creating directories, accessing files, and printing to your printer. Many other features, however, might not be important to you, depending on the type of computer you have and how you use it. If you plan to use a mouse with DOS, DOS must load the mouse-handling functions when your computer boots. If you don't plan to use a mouse, loading the mouse-handling functions ties up valuable memory, a sacrifice you don't want to make.

To give you the flexibility of using only the parts of DOS that you need, DOS consists of a base portion (which contains the features that everybody needs) and a series of what you might think of as “plug-in modules” (pieces of programs that give DOS the instructions it needs to perform certain tasks). Because you can decide which of the optional modules to use, you don't waste memory-loading features you don't need.


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