.Written in, andonly (version 5.x and earlier works on )Base Package ( support only for ): version 2 (Optionally for most files of the source distribution), 'Extension Pack' (including support):WebsiteOracle VM VirtualBox (formerly Sun VirtualBox, Sun xVM VirtualBox and Innotek VirtualBox) is a for, developed. Created by Innotek, it was acquired by in 2008, which was, in turn, acquired by Oracle in 2010. Contents.VirtualBox may be installed on,.

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There are also ports to. It supports the creation and management of guest running Windows, Linux, Solaris, and, as well as limited virtualization of macOS guests on Apple hardware. For some guest operating systems, a 'Guest Additions' package of device drivers and system applications is available, which typically improves performance, especially that of graphics. History Logo of VirtualBox OSE, 2007–2010VirtualBox was first offered by Innotek GmbH from, under a license, making one version of the product available at no cost for personal or evaluation use, subject to the VirtualBox Personal Use and Evaluation License (PUEL). In January 2007, based on counsel by, Innotek GmbH released VirtualBox Open Source Edition (OSE) as, subject to the requirements of the (GPL), version 2.Innotek GmbH also contributed to the development of and support in virtualization and OS/2 ports of products from which were later acquired.

Specifically, Innotek developed the 'additions' code in both and, which enables various host–guest OS interactions like shared or dynamic viewport resizing.acquired Innotek in February 2008.Sun in January 2010 and re-branded the product as 'Oracle VM VirtualBox'. LicensingThe core package is, since version 4 in December 2010, under (GPLv2). The separate 'VirtualBox Oracle VM VirtualBox extension pack' providing support for 2.0 and 3.0 devices, (RDP), disk encryption, and (PXE) boot is under a license, called Personal Use and Evaluation License (PUEL), which permits use of the software for personal use, educational use, or evaluation, free of charge. Since VirtualBox version 5.1.30 Oracle defines personal use as the installation of the software on a single host computer for non-commercial purposes.Prior to version 4, there were two different packages of the VirtualBox software.

The full package was offered free under the PUEL, with licenses for other commercial deployment purchasable from Oracle. A second package called the VirtualBox Open Source Edition (OSE) was released under GPLv2. This removed the same proprietary components not available under GPLv2.Building the for VirtualBox since version 4.2 requires the use of the compiler, for which the is approved as 'Open Source' by the but not as 'free' by the or under the.Although VirtualBox has experimental support for Mac OS X guests, the of Mac OS X does not permit the operating system to run on non-Apple hardware, and this is enforced within the operating system by calls to the Apple (SMC) in all Apple machines, which verifies the authenticity of the hardware. Emulated environment Running under VirtualBox onUsers of VirtualBox can load multiple guest OSes under a single host operating-system (host OS).

Each guest can be started, paused and stopped independently within its own (VM). The user can independently configure each VM and run it under a choice of or if the underlying host hardware supports this. The host OS and guest OSs and applications can communicate with each other through a number of mechanisms including a common clipboard and a virtualized network facility. Guest VMs can also directly communicate with each other if configured to do so.

Software-based virtualizationIn the absence of hardware-assisted virtualization, VirtualBox adopts a standard approach. This mode supports 32-bit guest OSs which run in rings 0 and 3 of the Intel architecture.

The system reconfigures the guest OS code, which would normally run in ring 0, to execute in ring 1 on the host hardware. Because this code contains many privileged instructions which cannot run natively in ring 1, VirtualBox employs a Code Scanning and Analysis Manager (CSAM) to scan the ring 0 code recursively before its first execution to identify problematic instructions and then calls the Patch Manager (PATM) to perform in-situ patching. This replaces the instruction with a jump to a VM-safe equivalent compiled code fragment in hypervisor memory. The guest user-mode code, running in ring 3, generally runs directly on the host hardware in ring 3.In both cases, VirtualBox uses CSAM and PATM to inspect and patch the offending instructions whenever a fault occurs. VirtualBox also contains a, based on to recompile any or code entirely (e.g. BIOS code, a DOS guest, or any operating system startup).Using these techniques, VirtualBox can achieve a performance comparable to that of.

Hardware-assisted virtualizationVirtualBox supports both 's and 's hardware-assisted virtualization. Making use of these facilities, VirtualBox can run each guest VM in its own separate address-space; the guest OS ring 0 code runs on the host at ring 0 in VMX non-root mode rather than in ring 1.VirtualBox supports some guests (including 64-bit guests, SMP guests and certain proprietary OSs) only on hosts with.

Device virtualizationThe system emulates hard disks in one of three disk image formats:. VDI: This format is the VirtualBox-specific VirtualBox Disk Image and stores data in files bearing a '.vdi'.: This is used by products such as. It stores data in one or more files bearing '.vmdk' filename extensions. A single virtual hard disk may span several files.: This format is used by and, and is the native virtual disk format of the operating system, starting with. Data in this format are stored in a single file bearing the '.vhd' filename extension.A VirtualBox virtual machine can, therefore, use disks previously created in VMware or Microsoft Virtual PC, as well as its own native format.

VirtualBox can also connect to targets and to raw partitions on the host, using either as virtual hard disks. VirtualBox emulates (PIIX4 and ICH6 controllers), (ICH8M controller) and controllers to which hard drives can be attached.VirtualBox has supported (OVF) since version 2.2.0 (April 2009).Both and host-connected physical devices can be mounted as CD/DVD drives. For example, the DVD image of a Linux distribution can be downloaded and used directly by VirtualBox.By default, VirtualBox provides graphics support through a custom virtual graphics-card that is compatible. Windows Virtual PC is a virtualization program for Microsoft Windows. In July 2006 Microsoft released the Windows version as a free product.

In August 2006, Microsoft announced the Macintosh version would not be ported to Intel-based Macintosh computers, effectively discontinuing the product as PowerPC-based Macintosh computers are no longer manufactured. The newest release, Windows Virtual PC, does not run on versions of Windows earlier than Windows 7, and does not officially support MS-DOS or operating systems earlier than Windows XP Professional SP3 as guests.

The older versions, which support a wider range of host and guest operating systems, remain available. Starting with Windows 8, Hyper-V supersedes Windows Virtual PC. A hypervisor is a computer software, firmware or hardware that creates and runs virtual machines. A computer on which a hypervisor runs one or more virtual machines is called a host machine, and each virtual machine is called a guest machine. The hypervisor presents the guest operating systems with a virtual operating platform and manages the execution of the guest operating systems. Multiple instances of a variety of operating systems may share the virtualized hardware resources: for example, Linux, Windows, and macOS instances can all run on a single physical x86 machine. This contrasts with operating-system-level virtualization, where all instances must share a single kernel, though the guest operating systems can differ in user space, such as different Linux distributions with the same kernel.

The Apple–Intel architecture, or Mactel, is an unofficial name used for Apple Macintosh personal computers developed and manufactured by Apple Inc. That use Intel x86 processors, rather than the PowerPC and Motorola 68000 ('68k') series processors used in their predecessors. With the change in architecture, a change in firmware became necessary; Apple selected the Intel-designed Extensible Firmware Interface (EFI) as its comparable component to the Open Firmware used on its PowerPC architectures, and as the firmware-based replacement for the PC BIOS from Intel. With the change in processor architecture to x86, Macs gained the ability to boot into x86-native operating systems, while Intel VT-x brought near-native virtualization with Mac OS X as the host OS. Hardware virtualization is the virtualization of computers as complete hardware platforms, certain logical abstractions of their componentry, or only the functionality required to run various operating systems. Virtualization hides the physical characteristics of a computing platform from the users, presenting instead an abstract computing platform. At its origins, the software that controlled virtualization was called a 'control program', but the terms 'hypervisor' or 'virtual machine monitor' became preferred over time.

Driver Pci System Peripheral Windows 98 Vmware Fusion Vs Parallels For Mac

Microsoft Hyper-V, codenamed Viridian, formerly known as Windows Server Virtualization, is a native hypervisor; it can create virtual machines on x86-64 systems running Windows. Starting with Windows 8, Hyper-V superseded Windows Virtual PC as the hardware virtualization component of the client editions of Windows NT. A server computer running Hyper-V can be configured to expose individual virtual machines to one or more networks.

Vmware Windows 98 Pci Universal Serial Bus

Hyper-V was first released with Windows Server 2008, and has been available without additional charge since Windows Server 2012 and Windows 8. A standalone Windows Hyper-V Server is free, but with command line interface only. In computing, a system virtual machine is a virtual machine provides a complete system platform which supports the execution of a complete operating system (OS).

These usually emulate an existing architecture, and are built with the purpose of either providing a platform to run programs where the real hardware is not available for use, or of having multiple instances of virtual machines leading to more efficient use of computing resources, both in terms of energy consumption and cost effectiveness, or both. A VM was originally defined by Popek and Goldberg as 'an efficient, isolated duplicate of a real machine'.

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