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Real mode

Real mode, also called real address mode, is an operating mode of all x86-compatible CPUs. The mode gets its name from the fact that addresses in real mode always correspond to real locations in memory. Real mode is characterized by a 20-bit segmented memory address space (giving 1 MB of addressable memory) and unlimited direct software access to all…

History, A20 line & Decline

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Overview

History

Addressing capacity

A20 line

Switching to real mode

Decline

Advanced semantic analysis

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Map overview Semantic statistics

Real mode

Nodes56
Edges55
Triples67
Avg. degree1.96
Density0.035714
Components1

How this topic connects Entity context

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Real mode

Top relations

related to history · 26
Real mode → As, CPU, CPUs, DOS, DR-DOS, Early, IBM, In, Intel, Linux, Microsoft Windows, MS-DOS, None, Notably, OS, OS's, OS/2, Since, The, The PC BIOS
related to Switching to real mode · 17
Real mode → Because, Before, BIOS, CPUs, DOS, DOS/4GW, DPMI, From, However, IBM Personal Computer, Intel, It, RAM, Resetting, The, Therefore, This
related to Addressing capacity · 11
Real mode → CPUs, However, Intel, KB, MB, Note, On, So, The, Therefore, This
related to Decline · 8
Real mode → As, DOS, DOSBox, MS-DOS, NT, The, Windows, Windows ME
see also · 2
Real mode → ModeBoot, Unreal

Important terminology Word statistics

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Important terminology

mode real protected memory 80286 address x86 operating run cpus systems windows switch system programs addresses a20 line 8086 80186

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
BIOSinstance ofbut this technique allows protected mode programs to use services0.80text
which runs entirely in real modeinstance ofbut this technique allows protected mode programs to use services0.80text
DOSBox or x86 virtualization productsinstance ofThe only way of running DOS applications that require real mode from within newer versions of Windows is by using emulators0.80text
Real moderelated to Addressing capacityThe0.60section
Real moderelated to Addressing capacityIntel0.60section
Real moderelated to Addressing capacityThis0.60section
Real moderelated to Addressing capacityOn0.60section
Real moderelated to Addressing capacityHowever0.60section
Real moderelated to Addressing capacityTherefore0.60section
Real moderelated to Addressing capacityNote0.60section
Real moderelated to Addressing capacitySo0.60section
Real moderelated to Addressing capacityCPUs0.60section

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    Min side: 3
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