Science Fair Project Encyclopedia
Ring 0
Ring 0 is one of the privilege levels in which an x86 processor can operate at any time. The others are rings 1 , 2 and 3 . Of these, most x86 operating systems use only two levels, namely Ring 0 and Ring 3. Ring 0 is the highest privilege level and is the level at which the operating system kernel runs (kernel mode). Ring 3 is the lowest privilege level and is the level at which user applications are run (user mode).
Ring 0 is also the title of a Japanese film directed by Tsuruta Norio. See Ringu 0.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details