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    Long mode - Wikipedia

    https://en.wikipedia.org/wiki/Long_mode

    In the x86-64 computer architecture, long mode is the mode where a 64-bit operating system can access 64-bit instructions and registers. 64-bit programs are run in a sub-mode called 64-bit mode, while 32-bit programs and 16-bit protected mode programs are executed in a sub-mode called

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    Overview

    An x86-64 processor acts identically as an IA-32 processor when running in real mode or protected mode, which are supported sub-modes when the processor is not in long mode.
    A bit in the

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    Memory limitations

    While register sizes have increased to 64 bits from the previous x86 architecture, memory addressinghas not yet been increased to the full 64 bits. For the time being, it is impractical to

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    See also

    • x86-64
    • 64-bit compatibility mode

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    External links

    • Zeichick, Alan (2003-12-03). "Platforms and Tools for the AMD Athlon 64 Processor". Developer. AMD. Archived from the originalon 2012-02-14. A guide to the new features of long

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  2. long mode - Wiktionary

    https://en.wiktionary.org/wiki/long_mode

    long mode. Wikipedia . Noun . long mode (uncountable) An operational mode of x86-64 computers which enables 64-bit addressing, running older 32-bit code in compatibility mode and foregoing support for real-mode applications entirely.

  3. Long mode - WikiMili, The Best Wikipedia Reader

    https://wikimili.com/en/Long_mode

    11/08/2021 · In the x86-64 computer architecture, long mode is the mode where a 64-bit operating system can access 64-bit instructions and registers. 64-bit programs are run in a sub-mode called 64-bit mode, while 32-bit programs and 16-bit protected mode programs are executed in a sub-mode called compatibility mode. Real mode or virtual 8086 mode programs …

  4. Setting Up Long Mode - OSDev Wiki

    https://wiki.osdev.org/Setting_Up_Long_Mode
    • What is long mode and why set it up? Since the introduction of the x86-64 processors (AMD64, Intel 64 (a.k.a. EM64T), VIA Nano) a new mode has been introduced as well, which is called long mode. Long mode basically consists out of two sub modes which are the actual 64-bit mode and compatibility mode (32-bit, usually referred to as IA32e in the AMD64 manuals). What we are i…
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  5. Unreal mode - Wikipedia

    https://en.wikipedia.org/wiki/Unreal_mode

    Long mode (AMD Athlon 64) x86 virtualization (Intel Pentium 4, AMD Athlon 64) First supported platform shown in parentheses: In x86 computing, unreal mode, also big real mode, huge real mode, flat real mode, or voodoo mode is a variant of real mode, in which one or more segment descriptors has been loaded with non-standard values, like 32-bit ...

  6. Long mode — Вікіпедія

    https://uk.wikipedia.org/wiki/Long_Mode

    В архітектурі x86-64, long mode - це режим в якому 64-бітна операційна система може використовувати 64-бітні інструкції та регістри. 64-бітні програми працюють в підрежимі що називається 64-бітним, а 32-бітні програми і 16-бітні програми захищеного режиму виконуються в підрежимі що називається режим сумісності. Програми реального режиму або режиму віртуального 8086 не можуть нативно виконуватись у long mode.

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