A request is issued in response to an instruction to a memory buffer control unit in accordance with one of first and second specific access methods. The request comprises a request code and a memory address. The first specific access method comprises the steps of holding preliminarily the request code...http://www.google.de/patents/US5197141?utm_source=gb-gplus-sharePatent US5197141 - Software controlled method of issuing hardware control commands to memory controller from prefetch unit by combining request code and address specified in program instructions
