Failure detection for instruction processor associative cache me

Details Failure detection for instruction processor associative cache me Failure detection for instruction processor associative cache me

1991-12-20

1994-09-06

Beausoliel, Jr., Robert W.

Excavating

395400, 395425, 371 511, G06F 1110

Patent

active

053455827

ABSTRACT:
A system for detecting failures in a cache memory stores data words that may represent instructions or operands in plurality of blocks. The data words are divided into a plurality of data bit groups. A tag memory is associated with each block of data words in the cache memory. Storage in the cache memory is directed by block address bits, and storage in the tag memory is directed by tag address bits. A first parity generator is coupled to the cache memory which generates address parity bits selected from block and tag address bits. A second parity generator provides data parity bits for each group of the data word bits. These two parity bits are combined and are stored along with the bit groups of the associated data word. Upon read-out of a data word, the stored combined parity bits are compared with parity bits that were generated from the selected address bits and data bits and error indication occurs when a parity error results.

REFERENCES:
patent: 3585378 (1971-05-01), Bouricius
patent: 3789204 (1974-01-01), Barlow
patent: 3967247 (1976-06-01), Andersen et al.
patent: 4010450 (1977-03-01), Porter et al.
patent: 4168541 (1979-09-01), DeKarske
patent: 4322795 (1982-03-01), Lange et al.
patent: 4335458 (1982-05-01), Krol
patent: 4493026 (1985-01-01), Olnowich
patent: 4641305 (1987-02-01), Joyce et al.
patent: 5210845 (1993-05-01), Crawford et al.
Smith, Allen J., "Cache Memories," Association for Computing Machinery (ACM), Computing Surveys, vol. 14, No. 3, Sep., 1982, pp. 473-530.

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