Apparatus for automatically correcting erroneous data and for st

Details Apparatus for automatically correcting erroneous data and for st Apparatus for automatically correcting erroneous data and for st

1984-12-28

1987-03-31

Smith, Jerry

Excavating

371 38, G06F 1114, G06F 1116

Patent

active

046548475

ABSTRACT:
An apparatus is disclosed which detects the existence of an error, in a computer system, corrects the error, and takes steps to ensure that the error will never again re-occur. The error resides in the integrity of data stored in a main memory. When the data is read from memory and found to be erroneous, the data is corrected and stored in a spare portion of a small alternate memory array. In addition, the identity of the corrected data is also stored in the alternate memory array. During a subsequent read of the data from the main memory, the alternate memory array is simultaneously consulted. The identity of the corrected data, stored in the alternate memory array, is compared with the incoming address, and the corrected data is read from the spare portion of the alternate memory array. As a result, the erroneous data is not reproduced during a subsequent read of the data from the main memory.

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