GB8333984D0 - Computer controlled systems - Google Patents

Computer controlled systems

Info

Publication number
GB8333984D0
GB8333984D0 GB838333984A GB8333984A GB8333984D0 GB 8333984 D0 GB8333984 D0 GB 8333984D0 GB 838333984 A GB838333984 A GB 838333984A GB 8333984 A GB8333984 A GB 8333984A GB 8333984 D0 GB8333984 D0 GB 8333984D0
Authority
GB
United Kingdom
Prior art keywords
information
data
memory
data element
regular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB838333984A
Other versions
GB2158622A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hemdal G A H
Original Assignee
Hemdal G A H
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hemdal G A H filed Critical Hemdal G A H
Priority to GB08333984A priority Critical patent/GB2158622A/en
Publication of GB8333984D0 publication Critical patent/GB8333984D0/en
Priority to AU37881/85A priority patent/AU3788185A/en
Priority to PCT/GB1984/000445 priority patent/WO1985002925A1/en
Priority to EP85900483A priority patent/EP0165986A1/en
Priority to IT24167/84A priority patent/IT1177492B/en
Publication of GB2158622A publication Critical patent/GB2158622A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
    • G06F11/1012—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices using codes or arrangements adapted for a specific type of error
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
    • G06F11/1048—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices using arrangements adapted for a specific error detection or correction feature
    • G06F11/106—Correcting systematically all correctable errors, i.e. scrubbing

Abstract

A computer system having a central processing unit, a memory for storage of information in binary form in a plurality of data elements and a master control unit for performing arithmetic/logical operations on information transferred between the central processor unit and the memory. At least certain of the data elements of the memory have means for repeatedly inverting the information stored therein to enable the integrity of the data element to be checked. In order to allow that inversion to continue whilst normal writing to and reading of information from the data element continues, the data element has an additional control digit which is inverted or written in regular form with the main data stored on the element to indicate to the device writing information to or reading information from the data element whether the element is in its regular or inverted form.
GB08333984A 1983-12-21 1983-12-21 Computer controlled systems Withdrawn GB2158622A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB08333984A GB2158622A (en) 1983-12-21 1983-12-21 Computer controlled systems
AU37881/85A AU3788185A (en) 1983-12-21 1984-12-20 Computer controlled systems
PCT/GB1984/000445 WO1985002925A1 (en) 1983-12-21 1984-12-20 Computer controlled systems
EP85900483A EP0165986A1 (en) 1983-12-21 1984-12-20 Computer controlled systems
IT24167/84A IT1177492B (en) 1983-12-21 1984-12-21 PROCESSOR SYSTEM WITH IMPROVED MEMORY SECURITY

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08333984A GB2158622A (en) 1983-12-21 1983-12-21 Computer controlled systems

Publications (2)

Publication Number Publication Date
GB8333984D0 true GB8333984D0 (en) 1984-02-01
GB2158622A GB2158622A (en) 1985-11-13

Family

ID=10553610

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08333984A Withdrawn GB2158622A (en) 1983-12-21 1983-12-21 Computer controlled systems

Country Status (5)

Country Link
EP (1) EP0165986A1 (en)
AU (1) AU3788185A (en)
GB (1) GB2158622A (en)
IT (1) IT1177492B (en)
WO (1) WO1985002925A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5699509A (en) * 1995-06-07 1997-12-16 Abbott Laboratories Method and system for using inverted data to detect corrupt data
JP6686892B2 (en) * 2014-10-24 2020-04-22 ソニー株式会社 Memory controller, memory system, and method of controlling memory controller

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2036517B2 (en) * 1970-07-23 1972-10-19 Ibm Deutschland Gmbh, 7000 Stuttgart PROCEDURE FOR OPERATING A DEFECTIVE MEMORY ELEMENT CONTAINING A MEMORY FOR PROGRAM-CONTROLLED ELECTRONIC DATA PROCESSING SYSTEMS
GB1344474A (en) * 1971-03-04 1974-01-23 Plessey Co Ltd Fault detection and handling arrangements for use in data proces sing systems
US3768071A (en) * 1972-01-24 1973-10-23 Ibm Compensation for defective storage positions
SE387764B (en) * 1975-09-16 1976-09-13 Ericsson Telefon Ab L M METHOD OF DETECTING ERRORS IN A MEMORY DEVICE AND CATEGORY APPLICATION LOGIC FOR PERFORMING THE SET
GB2099616A (en) * 1981-06-03 1982-12-08 Jpm Automatic Machines Ltd Improvements relating to microprocessor units
US4525599A (en) * 1982-05-21 1985-06-25 General Computer Corporation Software protection methods and apparatus
GB2122777A (en) * 1982-06-16 1984-01-18 Open Computer Services Limited Software protection apparatus and method
WO1984000225A1 (en) * 1982-06-21 1984-01-19 Daniel Muessli Method for scrambling digital information and device for implementing such method
EP0114522A3 (en) * 1982-12-27 1986-12-30 Synertek Inc. Rom protection device
GB8302096D0 (en) * 1983-01-26 1983-03-02 Int Computers Ltd Software protection in computer systems

Also Published As

Publication number Publication date
IT1177492B (en) 1987-08-26
AU3788185A (en) 1985-07-12
GB2158622A (en) 1985-11-13
EP0165986A1 (en) 1986-01-02
WO1985002925A1 (en) 1985-07-04
IT8424167A0 (en) 1984-12-21

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)