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Chapter 12. Using Peripherals > Setting Up Device Drivers

Setting Up Device Drivers

As mentioned at the beginning of the chapter, device drivers are memory-resident programs that enable DOS and application programs to interact with certain devices in the computer. Device drivers are generally set up in DOS through a statement in the system's CONFIG.SYS file. In rare cases, a device driver might be loaded in the AUTOEXEC.BAT file instead. Most device drivers use the .SYS extension.

Device drivers in the CONFIG.SYS file are loaded through either the DEVICE= or DEVICEHIGH= statements. The former loads the device driver into conventional memory, whereas the latter attempts to load the device driver into extended memory. Most device drivers function well either way, although in rare cases, a device driver might work properly only in conventional memory. Aside from this, though, whether they are located in conventional or extended memory is determined by the overall memory tuning for the system, which is discussed in Chapter 19, “Configuring Your Computer.”


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