1. A controller, comprising: a first memory interface adapted to be coupled to one or more first memory devices of a first memory type having a first set of attributes; a second memory interface adapted to be coupled to one or more second memory devices of a second memory type having a second set of attributes, wherein the first and second sets of attributes have at least one differing attribute; and interface logic coupled to the first and second interfaces and configured to direct memory transactions having a predefined first characteristic to the first memory interface and to direct memory transactions having a predefined second characteristic to the second memory interface.