Apparatus is provided for use in an Input/Output (I/O) subsystem. The I/O subsystem is coupled to a serial data transfer medium that transmits data from a sender to a recipient. The I/O subsystem processes a frame comprising user defined data and frame control data. The frame is received over the serial...http://www.google.de/patents/US5463762?utm_source=gb-gplus-sharePatent US5463762 - I/O subsystem with header and error detection code generation and checking
