Apparatus for automatically correcting erroneous data and for storing the corrected data in a common pool alternate memory array
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United States of America Patent
Stats
-
Mar 31, 1987
Grant Date -
N/A
app pub date -
Dec 28, 1984
filing date -
Dec 28, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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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