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UNIX system concepts for DOS programmers

I/O and device drivers

Device drivers in the UNIX system provide an interface to peripheral devices that is hardware-independent, just as they do in DOS systems. A programmer can write a program that outputs to disk, terminals, or printer without concern for the details of interfacing with the hardware. The hardware interface only needs to be written once and then utilized many times.

Device I/O in the UNIX system differs from the DOS implementation in two significant ways:



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