Management of input/output devices is one of the main roles performed by an operating system, allowing application software to use devices through a standardized interface. Due to a wide variety of hardware available on the market, it is necessary to use device drivers, which are programs that receive generic commands from the operating system and execute the required routines for each device, according to the manufacturer's specifications, reducing complexity of communication between user processes and input/output devices. This paper aims to produce documentation on the process of network interface driver development for the MINIX 3 operating system, serving as study support material. Information about the operating system is presented and also the implementation of a network interface driver is presented, as an example to explain its development, with source code and its operation described.
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