A servo loop control apparatus having a master microprocessor and at least one autonomous streamlined signal processor is disclosed. The architecture provides a general purpose controller for use in systems where intensive servo signal processing is required and is well suited to applications where...http://www.google.de/patents/US5771394?utm_source=gb-gplus-sharePatent US5771394 - Apparatus having signal processors for providing respective signals to master processor to notify that newly written data can be obtained from one or more memories 
