An HDLC formatter and a message processing core exchange messages over a high speed message exchange interface. The interface includes a memory shared by the HDLC formatter and the message processing core. A handshaking arrangement is used to coordinate message storage and retrieval in the shared memory...http://www.google.com/patents/US7007099?utm_source=gb-gplus-sharePatent US7007099 - High speed multi-port serial-to-PCI bus interface
