| 摘要 |
Apparatus for correcting memory errors by testing the addressable location causing the memory error in realtime. The memory responds to read requests by accessing the contents of the requested addressable location. If the contents of the addressable location contain errors, which are uncorrectable by other means, the memory saves the erroneous data word and the requested addressable location is tested by immediately writing into and reading from the requested addressable location. Two data words are sequentially written into and read from the requested addressable location which cause both a one and a zero to be written into each bit position of the requested addressable location. If the reads reveal an error at any bit positions of the requested addressable location, the corresponding bit positions of the erroneous data word are complimented and the resultant is transferred to the requestor using the normal data path. A hold signal is generated to halt the requestor during the time required to test the requested addressable location and correct the erroneous data word. |
