Apparatus and method for a page frame replacement in a data processing system having virtual memory addressing
CA 1284390 C · Owner: Bull Hn Information Systems Inc. · Inventors: Geyer, James B.; Morganti, Victor M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a multiprocessor, multiprogrammed data processing system employing virtual addressing apparatus and method are provided for selecting a page frame in main memory to be replaced by a new page of logic signal groups required by a processor. Rather than utilize a algorithm implemented in a series of logical decisions determined by a software procedure, the present invention provides for a single instruction that uses the status signals included with a page descriptor to address an entry in a table of resulting status signals. The relationship between the status signals and the table entries implements the algorithm. The table with entries of resulting status signals is associatedwith the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 21, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 21, 2008.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.