A data processing device 100 uses a portion of a random access memory 111 as an input buffer for holding a portion of a stream of data which is received by an input interface 130. Likewise, a portion of a memory 121 is used as an output buffer for holding a portion of processed data which is output by...http://www.google.de/patents/US5931934?utm_source=gb-gplus-sharePatent US5931934 - Method and apparatus for providing fast interrupt response using a ghost instruction
