A configurable network interface controller provides a multi-chip FIFO extension protocol. Utilizing this protocol, FIFOs that are physically separated (e.g., in separate chips) can be made to operate as though they are a single FIFO....http://www.google.co.uk/patents/US5513376?utm_source=gb-gplus-sharePatent US5513376 - Method of operating an extension FIFO in another device when it is full by periodically re-initiating a write operation until data can be transferred
