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Volume 3: General-Purpose and System Instructions - Stanford ...

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AMD64 Technology 24594 Rev. 3.10 February 2005GDTGlobal descriptor table.IDTInterrupt descriptor table.IGNIgnore. Field is ignored.indirectReferencing a memory location whose address is in aregister or other memory location. The address may be anabsolute or relative address. Compare direct.IRBThe virtual-8086 mode interrupt-redirection bitmap.ISTThe long-mode interrupt-stack table.IVTThe real-address mode interrupt-vector table.LDTLocal descriptor table.legacy x86The legacy x86 architecture. See “Related Documents” onpage xxvii for descriptions of the legacy x86 architecture.legacy modeAn operating mode of the AMD64 architecture in whichexisting 16-bit <strong>and</strong> 32-bit applications <strong>and</strong> operating systemsrun without modification. A processor implementation ofthe AMD64 architecture can run in either long mode or legacymode. Legacy mode has three submodes, real mode, protectedmode, <strong>and</strong> virtual-8086 mode.long modeAn operating mode unique to the AMD64 architecture. Aprocessor implementation of the AMD64 architecture canrun in either long mode or legacy mode. Long mode has twosubmodes, 64-bit mode <strong>and</strong> compatibility mode.xxPreface

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