hardware wikipedia


How an operating system manages hardware?

  • How an Operating System Manages Hardware An operating system (OS)is software that controls a computer. It manages hardware, runs applications, provides an interface for users, and stores, retrieves, and manipu- lates files. In general, an operating system acts as the middleman between applica- tions and hardware (see Figure 2-1).

What is the relationship between OS and hardware?

  • An operating system is responsible for communicating with hardware, but the OS does not relate directly to the hardware. Rather, the OS uses device drivers or the BIOS to interface with hardware. Figure 2-2 shows these relationships.

What is the difference between hardware and software?

  • Although the phys- ical hardware is the visible part of a computer system, the software is the intelligence of the sys- tem that enables the hardware components to work. After reading this chapter, you should have a general understanding of how hardware and software work together, and what happens when a PC is first turned on.

How does a hardware interrupt work?

  • hardware interrupts, and the device initiates an interrupt by placing voltage on the designated IRQ (interrupt request) lineassigned to it. This voltage on the line serves as a signal to the CPU that the device has a request that needs processing. Often, a hardware device that needs attention from the CPU is referred to as “needing servic- ing.”
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