Configurable set associative cache with decoded data element enable lines
May 10, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesVirtual cache Cache organization enabling concurrent line castout and line fetch transfers with main storage Cache synonym detection and handling mechanism Second level cache replacement method and apparatus Cache sharing control in a multiprocessor Set associative sector cache Method of performing a call operation in a digital data processing system having microcode call and return operations Hierarchical memory system including separate cache memories for storing data and instructions Odd/even storage in cache memory Interleaved set-associative memory Patent #: 4736293 InventorsAssigneeApplicationNo. 522503 filed on 05/10/1990US Classes:711/128, Associative365/49, ASSOCIATIVE MEMORIES365/230.01, ADDRESSING711/171Based on data sizeExaminersPrimary: Fears, Terrell W.Attorney, Agent or FirmInternational ClassG11C 013/00AbstractA set associative cache using decoded data element select lines which can be selectively configured to provide different data sets arrangements. The cache includes a tag array, a number of tag comparators corresponding to the maximum possible number of sets, a data element select logic circuit, and a data array. The tag and data arrays each provide, in response to an input address, a number of output tag and data elements, respectively. The number of output tag and data elements depends upon the maximum set size desired for the cache. An input main memory address is used to address both the tag and data arrays. The tag comparators compare a tag field portion of the input main memory address to each element output from the tag array. The select logic then uses the outputs of the tag comparators and one or more of the input main memory address bits to generate decoded data array enable signals. The decoded enable signals are then coupled to enable the desired one of the enabled data elements.Other References
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