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The study of several theories and models of consciousness, among them the functional and cognitive model exhibited in Baars’ ‘Global Workspace’ theory, led us to identify computational correlates of consciousness and discuss their possible representations within a model of intelligent agent. We first review a particular agent implementation given by an abstract machine, and then identify the extensions required in order to accommodate the main attributes of consciousness. This amounts to form unconscious processor coalitions that result in the creation of contexts. These extensions can be formulated within a reified virtual machine encompassing a representation of the original machine as well as an additional introspective component.