Static information storage and retrieval – Addressing – Multiple port access
Patent
1998-08-17
1999-09-28
Nelms, David
Static information storage and retrieval
Addressing
Multiple port access
36518901, 365221, 36518905, G11C 800
Patent
active
059599324
ABSTRACT:
A buffer memory includes at least one memory including a plurality of memory locations, and at least one write-control circuit. When data is written to one of the plurality of memory locations, the at least one write-control circuit causes at least one bit of validation information to be written to the at least one memory to indicate that the data written to the one of the plurality of memory locations is valid. In response to data being read from the one of the plurality of memory locations, the at least one write-control circuit causes the at least one bit of validation information to be overwritten to indicate that the data stored in the one of the plurality of memory locations is invalid. In another embodiment, a method for operating a buffer memory including a plurality of memory locations includes steps of: (a) when data is written to one of the plurality of memory locations, storing at least one bit of validation information in the buffer memory indicating that the data written to the one of the plurality of memory locations is valid; and (b) in response to the data being read from the one of the plurality of memory locations, overwriting the at least one bit of validation information to indicate that the data stored in the one of the plurality of memory locations is invalid.
REFERENCES:
patent: 5088061 (1992-02-01), Golnabi et al.
patent: 5568443 (1996-10-01), Dixon et al.
patent: 5751887 (1998-05-01), Nitta et al.
patent: 5771331 (1998-06-01), Aoki et al.
Bermingham Michael
Maclellan Christopher S.
Walton John K.
EMC Corporation
Lam David
Nelms David
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