Data transfers between respective buffer segments and data source-sinks, such as peripheral data storage devices, are scheduled as a series of transfers based upon most recent, next most recent, to the least recent usage of the buffer segments by a utilization device. A list of segments ordered by such...http://www.google.com/patents/US4467411?utm_source=gb-gplus-sharePatent US4467411 - Scheduling device operations in a buffered peripheral subsystem
