kernel (operating system) wikipedia - EAS
Operating systems communicate with most hardware components using:
- Using a software-simulated interrupt. This method is available on most hardware, and is therefore very common.
- Using a call gate. A call gate is a special address stored by the kernel in a list in kernel memory at a location known to the processor. ...
- Using a special system call instruction. ...
- Using a memory-based queue. ...
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Kernel (operating system) - Wikipedia
The kernel is a computer program at the core of a computer's operating system and generally has complete control over everything in the system. It is the portion of the operating system code that is always resident in memory, and facilitates interactions between hardware and software components. A
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Xem thêmRandom-access memory(RAM) is used to store both program instructions and data. Typically, both need to be present in memory in order for a program to execute. Often multiple programs will want access to memory, frequently
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Xem thêmI/O devices include such peripherals as keyboards, mice, disk drives, printers, USB devices, network adapters, and display devices. The kernel allocates requests from applications to perform I/O to an appropriate device and provides convenient methods for
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Xem thêmKey aspects necessary in resource management are defining the execution domain (address space) and the protection mechanism used to mediate access to the resources
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Xem thêmThe kernel has full access to the system's memory and must allow processes to safely access this memory as they require it. Often the first step in
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Xem thêmIn computing, a system call is how a process requests a service from an operating system's kernel that it does not normally have permission to run. System calls provide the interface
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Xem thêmProtection
An important consideration in the design of a kernel is the support it provides for protection from faults (...
Xem thêmTo perform useful functions, processes need access to the peripherals connected to the computer, which are controlled by the kernel through device drivers. A device driver is a computer program that enables the operating system to interact with a hardware device. It
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Comparison of operating system kernels - Wikipedia
A kernel is the most fundamental component of a computer operating system. A comparison of system kernels can provide insight into the design and architectural choices made by the developers of particular operating systems.
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