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When processes use virtual addresses and an instruction requests access to memory, the processor translates the virtual address to a physical address using a page table or translation lookaside buffer (TLB). When running a virtual system, it has allocated virtual memory of the host system that serves as a physical memory for the guest system ...
Proprietary, some components GPLv2 [10] Virtual Machine Manager: Red Hat: x86, x86-64 x86, x86-64 Linux Linux, Windows GPL version 2 Virtual PC 2007 (discontinued) Connectix and Microsoft: x86, x86-64 x86 Windows Vista (Business, Enterprise, Ultimate), XP Pro, XP Tablet PC Edition DOS, Windows, OS/2, Linux (SUSE, Xubuntu), OpenSolaris (Belenix ...
In computing, BIOS (/ ˈ b aɪ ɒ s,-oʊ s /, BY-oss, -ohss; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is a type of firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the booting process (power-on startup). [1]
Higher performance hardware such as graphics cards use DMA to access memory directly; in a virtual environment all memory addresses are re-mapped by the virtual machine software, which causes DMA devices to fail. The IOMMU handles this re-mapping, allowing the native device drivers to be used in a guest operating system.
BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...
Explicit data graph execution, or EDGE, is a type of instruction set architecture (ISA) which intends to improve computing performance compared to common processors like the Intel x86 line. EDGE combines many individual instructions into a larger group known as a "hyperblock".
Boot Camp allows owners of Intel-based Apple Macintosh computers to install Windows XP, Vista, 7, 8, and 10 on their Macs. The software was initially available in beta version as a download from Apple's website (which was compatible with Mac OS X version 10.4 (Tiger)), and later came bundled with Mac OS X since version 10.5 (Leopard).
x86 virtualization is the use of hardware-assisted virtualization capabilities on an x86/x86-64 CPU.. In the late 1990s x86 virtualization was achieved by complex software techniques, necessary to compensate for the processor's lack of hardware-assisted virtualization capabilities while attaining reasonable performance.