The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 1988
Filed:
Sep. 18, 1984
Eric P Kronstadt, Westchester County, NY (US);
Sharad P Gandhi, Santa Clara, CA (US);
International Business Machines Corp., Armonk, NY (US);
Abstract
A microcomputer memory system is organized into a plurality of banks (16). Each back consists of an array of static column mode dynamic random access memories (DRAMs) of the type having an on-chip static buffer for storing an entire row. The static buffers associated with each bank functions as a distributed cache (24) to hold the last accessed row for the associated bank. A memory controller (18) receives real addresses from a CPU (10) or other device on the memory bus (14) and extracts bank and row numbers from the address. The memory controller determines whether the accessed row for a memory bank is in the distributed cache and, if it is, accesses the distributed cache for that bank. Otherwise, the memory controller switches the contents of the distributed cache with the contents of the addressed row for that bank.