Virtual memory and X86 virtualization

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Difference between Virtual memory and X86 virtualization

Virtual memory vs. X86 virtualization

In computing, virtual memory (also virtual storage) is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" which "creates the illusion to users of a very large (main) memory." The computer's operating system, using a combination of hardware and software, maps memory addresses used by a program, called virtual addresses, into physical addresses in computer memory. In computing, x86 virtualization refers to hardware virtualization for the x86 architecture.

Computing

Computing is any goal-oriented activity requiring, benefiting from, or creating computers.

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Direct memory access

Direct memory access (DMA) is a feature of computer systems that allows certain hardware subsystems to access main system memory (Random-access memory), independent of the central processing unit (CPU).

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Emulator

In computing, an emulator is hardware or software that enables one computer system (called the host) to behave like another computer system (called the guest).

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IBM System/370

The IBM System/370 (S/370) was a model range of IBM mainframe computers announced on June 30, 1970 as the successors to the System/360 family.

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Input–output memory management unit

In computing, an input–output memory management unit (IOMMU) is a memory management unit (MMU) that connects a direct-memory-access–capable (DMA-capable) I/O bus to the main memory.

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Intel 80286

The Intel 80286 (also marketed as the iAPX 286 and often called Intel 286) is a 16-bit microprocessor that was introduced on 1 February 1982.

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Intel 80386

The Intel 80386, also known as i386 or just 386, is a 32-bit microprocessor introduced in 1985.

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Interrupt

In system programming, an interrupt is a signal to the processor emitted by hardware or software indicating an event that needs immediate attention.

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Memory management unit

A memory management unit (MMU), sometimes called paged memory management unit (PMMU), is a computer hardware unit having all memory references passed through itself, primarily performing the translation of virtual memory addresses to physical addresses.

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Operating system

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.

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Protected mode

In computing, protected mode, also called protected virtual address mode, is an operational mode of x86-compatible central processing units (CPUs).

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Virtual machine

In computing, a virtual machine (VM) is an emulation of a computer system.

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X86

x86 is a family of backward-compatible instruction set architectures based on the Intel 8086 CPU and its Intel 8088 variant.

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