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Ringzero is the name of a new operating mode implemented for Doomsday 1.9.7 that allows the engine to be used without a loaded game component.

The name "ring zero" is a reference to the computer architecture model where the innermost (security) layer is called Ring 0.[1] In Doomsday, this is not strictly used in the context of security, but rather more informally to mean the core/plain operating mode of the engine.

See also


  1. http://en.wikipedia.org/wiki/Ring_(computer_security)