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== Processor modes ==
{{Main|CPU modes}}
{{Original research|section|reason=The terminology seems inconsistent. The text appears to imply that it refers to x86 at least partially, but uses terms not commonly used in application to this architecture. The claim that OS changes protection mode on software interrupt is likely incorrect.|date=November 2023}}
Contemporary [[processors]] incorporate a mode bit to define the execution capability of a program in the processor. This bit can be set to ''[[kernel mode]]'' or ''[[user mode]]''. Kernel mode is also commonly referred to as ''[[supervisor mode]]'', ''monitor mode'' or ''[[ring 0 (computer security)|ring 0]]''.
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