A plurality of video dynamic random access memory devices (VRAMs) distributed among low speed local area network ports of a distributed memory switching hub interconnecting heterogeneous local area networks operating at different transmission speeds for receiving, storing and forwarding...http://www.google.co.uk/patents/US5812792?utm_source=gb-gplus-sharePatent US5812792 - Use of video DRAM for memory storage in a local area network port of a switching hub 
