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  2. Intel 5-level paging - Wikipedia

    en.wikipedia.org/wiki/Intel_5-level_paging

    Intel 5-level paging, referred to simply as 5-level paging in Intel documents, is a processor extension for the x86-64 line of processors. [1]: 11 It extends the size of virtual addresses from 48 bits to 57 bits by adding an additional level to x86-64's multilevel page tables, increasing the addressable virtual memory from 256 TiB to 128 PiB.

  3. Control register - Wikipedia

    en.wikipedia.org/wiki/Control_register

    If set, enables 5-Level Paging. [15] [16]: 2–18 13: VMXE: Virtual Machine Extensions Enable: see Intel VT-x x86 virtualization. 14: SMXE: Safer Mode Extensions Enable: see Trusted Execution Technology (TXT) 15 [a] (Reserved) — 16: FSGSBASE: FSGSBASE Enable: If set, enables the instructions RDFSBASE, RDGSBASE, WRFSBASE, and WRGSBASE. 17 ...

  4. Physical Address Extension - Wikipedia

    en.wikipedia.org/wiki/Physical_Address_Extension

    PAE was first introduced by Intel in the Pentium Pro, and later by AMD in the Athlon processor. [2] It defines a page table hierarchy of three levels (instead of two), with table entries of 64 bits each instead of 32, allowing these CPUs to directly access a physical address space larger than 4 gigabytes (2 32 bytes).

  5. x86-64 - Wikipedia

    en.wikipedia.org/wiki/X86-64

    x86-64 (also known as x64, x86_64, AMD64, and Intel 64) [note 1] is a 64-bit extension of the x86 instruction set architecture first announced in 1999. It introduces two new operating modes: 64-bit mode and compatibility mode, along with a new four-level paging mechanism.

  6. CPUID - Wikipedia

    en.wikipedia.org/wiki/CPUID

    For example, on Intel Crystalwell CPUs, executing CPUID with EAX=4 and ECX=4 will cause the processor to return the following size information for its level-4 cache in EBX and ECX: EBX=03C0F03F and ECX=00001FFF - this should be taken to mean that this cache has a cache line size of 64 bytes (EBX[11:0]+1), has 16 cache lines per tag (EBX[21:12 ...

  7. Talk:Intel 5-level paging - Wikipedia

    en.wikipedia.org/wiki/Talk:Intel_5-level_paging

    In the Intel white paper (reference 1) I cannot allocate a page where it says that the highest bits must be sign extended. This is probably a result of good rewording, can the page number be added? In the IA-32 Architectures manual, I seem to be too stupid to reach the indicated pages---I guess it is in one of the documents linked on that page.

  8. Memory management unit - Wikipedia

    en.wikipedia.org/wiki/Memory_management_unit

    A 68451 MMU, which could be used with the Motorola 68010. A memory management unit (MMU), sometimes called paged memory management unit (PMMU), [1] is a computer hardware unit that examines all memory references on the memory bus, translating these requests, known as virtual memory addresses, into physical addresses in main memory.

  9. Protected mode - Wikipedia

    en.wikipedia.org/wiki/Protected_mode

    In computing, protected mode, also called protected virtual address mode, [1] is an operational mode of x86-compatible central processing units (CPUs). It allows system software to use features such as segmentation, virtual memory, paging and safe multi-tasking designed to increase an operating system's control over application software.