U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Memory controller with error logging

Patent 4964129 Issued on October 16, 1990. Estimated Expiration Date: Icon_subject December 21, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Apparatus for detecting, correcting and logging single bit memory read errors
Patent #: 4371930
Issued on: 02/01/1983
Inventor: Kim

Apparatus for detecting, correcting and logging single bit memory read errors using syndrome generating and decoding circuitry
Patent #: 4375664
Issued on: 03/01/1983
Inventor: Kim

Fault alignment exclusion method to prevent realignment of previously paired memory defects
Patent #: 4453248
Issued on: 06/05/1984
Inventor: Ryan

Systematic memory error detection and correction apparatus and method
Patent #: 4506362
Issued on: 03/19/1985
Inventor: Morley

Partial defective chip memory support system
Patent #: 4523313
Issued on: 06/11/1985
Inventor: Nibby, Jr. ,   et al.

Remap method and apparatus for a memory system which uses partially good memory devices
Patent #: 4527251
Issued on: 07/02/1985
Inventor: Nibby, Jr. ,   et al.

Apparatus for error correction
Patent #: 4532629
Issued on: 07/30/1985
Inventor: Furuya ,   et al.

Correction and monitoring of transient errors in a memory system
Patent #: 4535455
Issued on: 08/13/1985
Inventor: Peterson

Memory correction scheme using spare arrays
Patent #: 4584681
Issued on: 04/22/1986
Inventor: Singh ,   et al.

Memory failure detection apparatus Patent #: 4809276
Issued on: 02/28/1989
Inventor: Lemay ,   et al.

Inventors

Assignee

Application

No. 287927 filed on 12/21/1988

US Classes:

714/764, Error correct and restore714/704, Error count or rate714/719, Read-in with read-out and compare714/723Error mapping or logging

Examiners

Primary: Smith, Jerry
Assistant: Beausoliel, Robert

Attorney, Agent or Firm

International Class

G06F 011/10

Abstract

In accordance with the present invention, there is provided a system for logging an error that occurred in a multi-chip memory storage device in a data processing system. The system has a mechanism for detecting an error and for receiving data and check bits associated therewith. The mechanism for detecting an error generates syndrome bits as a function of the data and of the check bits. Connected to the error detecting mechanism is an error logging mechanism which is adapted to receive the syndrome bits and to determine the chip in which the error occurred.

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