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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). 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.

History & Measurement

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Explore the main themes, entities and connections around Protected mode. Start with the topic map, then use the sections below for research and deeper semantic analysis.

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Overview

History

386 additions to protected mode

Entering and exiting protected mode

Features

Operating systems

Advanced semantic analysis

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Map overview Semantic statistics

Protected mode

Nodes91
Edges90
Triples101
Avg. degree1.98
Density0.021978
Components1

How this topic connects Entity context

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Protected mode

Top relations

related to Entering and exiting protected mode · 22
Protected mode → A20, Also, BIOS, CPU, CR0, Enabling A20, GDT, Global Descriptor Table, IBM, IBM AT, IBM PC, IBM-compatible, Intel, Later, MB, PC/XT, PE, RAM, Then, This
related to Operating systems · 17
Protected mode → DLLs, Family API, GUI, If, In Windows, It, MARK, MEMORY, Operating, OS/2, Some, Starting, That, This, Unix, Updating, Windows
related to The 286 · 14
Protected mode → Acceptance, Because, BIOS, Coherent, CPU, DOS, KB, Microsoft Xenix, Minix, Real, Several, The, This, To
related to Paging · 11
Protected mode → At, Each PDE, Each PTE, In, Originally, Paging, PDE, PTE, The, This, Through
related to The 386 · 10
Protected mode → DOS, Furthermore, Hardware, In, Intel, Linux, Microsoft Windows, Protected, The, With
related to External links · 6
Protected mode → Intel ArchitectureProtected Mode Overview, Protected Mode BasicsIntroduction, Protected Mode Operations, Protected-ModeOverview, Tutorial, TutorialCode Project Protected Mode
related to Virtual 8086 mode · 6
Protected mode → I/O, In, Intel, Programs, Virtual, With
related to 386 additions to protected mode · 3
Protected mode → Paging32-bit, The, With
related to Features · 2
Protected mode → Protected, These
related to Privilege levels · 2
Protected mode → In, The

Important terminology Word statistics

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Important terminology

mode segment protected memory real address virtual 8086 operating system bit 286 descriptor software code use x86 also used run

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
segmentationinstance ofIt allows system software to use features0.80text
virtual memoryinstance ofIt allows system software to use features0.80text
paginginstance ofIt allows system software to use features0.80text
safe multi-tasking designed to increase an operating system's control over application software.When a processor that supports x86 protected mode is powered oninstance ofIt allows system software to use features0.80text
it begins executing instructions in real modeinstance ofIt allows system software to use features0.80text
in order to maintain backward compatibility with earlier x86 processorsinstance ofIt allows system software to use features0.80text
the inability to make BIOSinstance ofSeveral shortcomings0.80text
DOS calls due to inability to switch back to real mode without resetting the processor prevented widespread usageinstance ofSeveral shortcomings0.80text
Protected moderelated to 386 additions to protected modeWith0.60section
Protected moderelated to 386 additions to protected modePaging32-bit0.60section
Protected moderelated to 386 additions to protected modeThe0.60section
Protected moderelated to Entering and exiting protected modeUntil0.60section

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