The following sections of this BookRags Literature Study Guide is offprint from Gale's For Students Series: Presenting Analysis, Context, and Criticism on Commonly Studied Works: Introduction, Author Biography, Plot Summary, Characters, Themes, Style, Historical Context, Critical Overview, Criticism and Critical Essays, Media Adaptations, Topics for Further Study, Compare & Contrast, What Do I Read Next?, For Further Study, and Sources.
(c)1998-2002; (c)2002 by Gale. Gale is an imprint of The Gale Group, Inc., a division of Thomson Learning, Inc. Gale and Design and Thomson Learning are trademarks used herein under license.
The following sections, if they exist, are offprint from Beacham's Encyclopedia of Popular Fiction: "Social Concerns", "Thematic Overview", "Techniques", "Literary Precedents", "Key Questions", "Related Titles", "Adaptations", "Related Web Sites". (c)1994-2005, by Walton Beacham.
The following sections, if they exist, are offprint from Beacham's Guide to Literature for Young Adults: "About the Author", "Overview", "Setting", "Literary Qualities", "Social Sensitivity", "Topics for Discussion", "Ideas for Reports and Papers". (c)1994-2005, by Walton Beacham.
All other sections in this Literature Study Guide are owned and copyrighted by BookRags, Inc.
Real mode is an operating mode of x86 microprocessor chips that emulates the memory management used by the 8086 or 8088 microprocessor chips manufactured by Intel. The real mode of execution is supported by Intel 80286 processors ad those developed subsequently.
Real mode limits the processor to 1MB of memory and does not provide any memory management or memory protection. In real mode, adding a so-called address offset to an existing segment register creates addresses. This generates an address that is 20 bits long. In another mode, called protected mode, memory protection and management features are available, as the segment register can link to a table of descriptors. The descriptors contain the memory protection information. The protected mode also supports multitasking, while real mode does not.
Examples of real mode of operation include the drivers that support various devices and MS-DOS. The 80386 and later microprocessors also support a third mode called virtual 8086 mode. In virtual mode, the microprocessors can run several real mode programs simultaneously.