Cache error code update

Details Cache error code update Cache error code update

1986-09-15

1988-08-30

Fleming, Michael R.

Excavating

371 49, 371 10, G06F 1100

Patent

active

047681977

ABSTRACT:
A system for updating an ECC code over a line in a data store when only part of the line has been updated is described. The system receives the update and its address, decodes the address to generate a first signal identifying the part of the line to be updated and a second signal identifying an un-updated part of the section. The data of the update and the first signal are used to generate a first partial error code. Data from the un-updated part of the line is read as the update is written to the store. The data from the un-updated part of the section and the second signal are used to generate a second partial error code. Finally, the first and second partial error codes are combined to generate the updated error code.

REFERENCES:
patent: 4164017 (1979-08-01), Randall
patent: 4342084 (1982-07-01), Sager
patent: 4483003 (1984-11-01), Beal
patent: 4564944 (1986-01-01), Arnold
patent: 4651321 (1987-03-01), Woffinden
patent: 4686621 (1987-08-01), Keeley

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