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Virtual device drivers represent a particular variant of device drivers. They are used to emulate a hardware device, particularly in virtualization environments, for example when a DOS program is run on a Microsoft Windows computer or when a guest operating system is run on, for example, a Xen host.
For a device driver generation, one have to first write the driver functionalities in these interface specification languages and then use a compiler which will generate the low level driver code. HAIL (Hardware Access Interface Language) [ 17 ] is another domain-specific device driver specification language.
Windows Driver Frameworks (WDF, formerly Windows Driver Foundation), is a set of Microsoft tools and libraries that aid in the creation of device drivers for Windows 2000 and later versions of Windows. It complements Windows Driver Model, abstracting away much of the boilerplate complexity in writing Windows drivers.
This is particularly useful for devices that are intermittently connected to the system or support hot swapping via a bus technology such as USB or FireWire. According to Microsoft, UMDF drivers are simpler to write and debug than kernel-mode drivers. [2] However, UMDF would not be used for performance-intensive or highly stateful devices.
Installation (or setup) of a computer program (including device drivers and plugins), is the act of making the program ready for execution. Installation refers to the particular configuration of software or hardware with a view to making it usable with the computer. A soft or digital copy of the piece of software (program) is needed to install it.
Prior to the advent of Windows, DOS applications would either communicate directly with the various pieces of hardware (responding to interrupts, reading and writing device memory etc.) or go through a DOS device driver. As DOS was not multitasking, each application would have exclusive and complete control over the hardware while running.
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WinUSB is a generic USB driver provided by Microsoft, for their operating systems starting with Windows Vista but which is also available for Windows XP. It is aimed at simple devices that are accessed by only one application at a time (for example instruments like weather stations, devices that only need a diagnostic connection or for firmware upgrades).