A mechanism for controlling the types of access permitted to an area of memory is known as a memory protect. In virtual memory systems it may be possible to assign certain areas as being capable of designated modes of access; for example, an area that is known to contain only the code of shared subroutines may be designated as having “execute only” access, and can only be read during the instruction-fetch phase of executing an instruction. The permitted mode of access may differ for different processes. Definition of memory areas may use bounds registers; fixed memory areas may be controlled by locks and keys; individual words may be controlled by tags.
A violation of the memory protection system usually leads via an interrupt to a forced process termination.
"memory protection." A Dictionary of Computing. . Encyclopedia.com. (October 17, 2018). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/memory-protection
"memory protection." A Dictionary of Computing. . Retrieved October 17, 2018 from Encyclopedia.com: http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/memory-protection
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
American Psychological Association
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.