First-in, first-out memory circuit

摘要: A media access controller is provided by the present invention. feature of invention a content addressable memory architecture whereby address filtering for physical, group and broadcast addresses on an Ethernet network. Another interface capable supporting external filters which in turn are spanning tree source routing algorithms. Still another CRC checker having improved testability such that burdensome computations input bit test patterns no longer required. first-in, first-out register validity bits associated with each stored data byte, bytes may be indiscriminately stored, regardless their validity, invalid discarded during retrieval bytes.