Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Patent
1996-03-14
1999-02-23
Bragdon, Reginald G.
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
711118, 711142, 711202, G06F 1208
Patent
active
058754512
ABSTRACT:
A computer system with a hybrid main memory which includes both EDRAM and DRAM, with a DRAM cache provided within a designated portion of the EDRAM portion of the main memory. Read requests are handled by copying data being read from DRAM into a cache portion of EDRAM under the direction of a pseudo cache controller and decoder which converts the DRAM address to a EDRAM address corresponding to the cache location of EDRAM. Read "hit" requests are responded to by reading data directly from the cache portion of EDRAM. Write requests to DRAM are, for purposes of cache coherency when a copy of the address being written to is present in the EDRAM cache portion, accomplished by writing data both to DRAM and overwriting the stale data existing in the cache portion of EDRAM.
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patent: 5699317 (1997-12-01), Sartore et al.
patent: 5721828 (1998-02-01), Frisch
J. Handy, The Cache Memory Book, .COPYRGT.1993 Academic Press, Inc., San Diego, California, pp. 37-106, 125-190.
Bragdon Reginald G.
Burton, Esq. Carol W.
Enhanced Memory Systems Inc.
Kubida, Esq. William J.
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