FR2385149A1 - Procede de protection de zone de memoire de commande - Google Patents

Procede de protection de zone de memoire de commande

Info

Publication number
FR2385149A1
FR2385149A1 FR7804186A FR7804186A FR2385149A1 FR 2385149 A1 FR2385149 A1 FR 2385149A1 FR 7804186 A FR7804186 A FR 7804186A FR 7804186 A FR7804186 A FR 7804186A FR 2385149 A1 FR2385149 A1 FR 2385149A1
Authority
FR
France
Prior art keywords
signal
circuit
control
memory
control memory
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.)
Granted
Application number
FR7804186A
Other languages
English (en)
Other versions
FR2385149B1 (fr
Inventor
Charles H Gaudette
Raymond Ch Williams
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2385149A1 publication Critical patent/FR2385149A1/fr
Application granted granted Critical
Publication of FR2385149B1 publication Critical patent/FR2385149B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14—Protection against unauthorised use of memory or access to memory
    • G06F12/1416—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights
    • G06F12/1425—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights the protection being physical, e.g. cell, word, block

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Storage Device Security (AREA)

Abstract

Procédé de protection de zone de mémoire de commande contre des changements intempestifs survenant à la suite d'erreurs d'adressage dans le programme de commande. Un bit 3 est positionné à 1 dans le registre de commande CRO de façon à fournir un signal de protection au circuit ET 26 lorsque la protection de la zone de mémoire est établie. En presence d'un signal 14 de demande d'accès à la mémoire en même temps qu un signal 23A indiquant que l'adresse demandée correspond à la zone protégée, le circuit 26 fournit un signal de commande d'interruption, et le signal d'accès à la mémoire est bloqué par le circuit ET 33. Application aux systèmes de traitement de données.
FR7804186A 1977-03-24 1978-02-08 Procede de protection de zone de memoire de commande Granted FR2385149A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/780,937 US4093987A (en) 1977-03-24 1977-03-24 Hardware control storage area protection method and means

Publications (2)

Publication Number Publication Date
FR2385149A1 true FR2385149A1 (fr) 1978-10-20
FR2385149B1 FR2385149B1 (fr) 1981-07-31

Family

ID=25121142

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7804186A Granted FR2385149A1 (fr) 1977-03-24 1978-02-08 Procede de protection de zone de memoire de commande

Country Status (7)

Country Link
US (1) US4093987A (fr)
JP (1) JPS53118321A (fr)
CA (1) CA1085517A (fr)
DE (1) DE2810421C2 (fr)
FR (1) FR2385149A1 (fr)
GB (1) GB1579526A (fr)
IT (1) IT1110466B (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408292A (en) * 1979-09-27 1983-10-04 Sharp Kabushiki Kaisha Data print control in an electronic cash register
US4405983A (en) * 1980-12-17 1983-09-20 Bell Telephone Laboratories, Incorporated Auxiliary memory for microprocessor stack overflow
US4472790A (en) * 1982-02-05 1984-09-18 International Business Machines Corporation Storage fetch protect override controls
US4506329A (en) * 1982-03-08 1985-03-19 Pitney Bowes Inc. Non-volatile memory serial number lock for electronic postage meter
US4590552A (en) * 1982-06-30 1986-05-20 Texas Instruments Incorporated Security bit for designating the security status of information stored in a nonvolatile memory
US4499545A (en) * 1982-06-30 1985-02-12 Pitney Bowes Inc. Method and apparatus for individualized selection of special fee postage value computations
US4525786A (en) * 1982-07-12 1985-06-25 Pitney Bowes Inc. Electronic postage meter having a one time actuable operating program to enable setting of critical accounting registers to predetermined values
JPS60107156A (ja) * 1983-11-16 1985-06-12 Hitachi Ltd デ−タ処理システム
FR2586310A1 (fr) * 1985-08-14 1987-02-20 Daneluzzo Claude Systeme de protection destine notamment aux logiciels
JPH0434266Y2 (fr) * 1986-11-18 1992-08-14
US5778444A (en) * 1996-05-06 1998-07-07 Motorola, Inc. Method and apparatus for reset-sensitive and controlled register write accesses in a data processing system with user and test modes
US5920690A (en) * 1997-08-11 1999-07-06 Motorola, Inc. Method and apparatus for providing access protection in an integrated circuit
US7539828B2 (en) * 2000-08-08 2009-05-26 Faronics Corporation Method and system for automatically preserving persistent storage
US7409722B2 (en) * 2003-05-01 2008-08-05 Sun Microsystems, Inc. Control status register access to enable domain reconfiguration
WO2006136189A1 (fr) * 2005-06-23 2006-12-28 Bayerische Motoren Werke Aktiengsellschaft Procede et dispositif pour surveiller un acces non autorise a une memoire d'une unite de calcul, en particulier dans un vehicule automobile

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247707B (de) * 1962-05-30 1967-08-17 Telefunken Patent Anordnung zur Datensicherung im Arbeitsspeicher einer elektronischen Rechenmaschine
US3742458A (en) * 1970-09-30 1973-06-26 Yokogawa Electric Works Ltd Memory protection system providing fixed, conditional and free memory portions corresponding to ranges of memory address numbers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761883A (en) * 1972-01-20 1973-09-25 Ibm Storage protect key array for a multiprocessing system
DD98383A1 (fr) * 1972-06-21 1973-06-12
US3916385A (en) * 1973-12-12 1975-10-28 Honeywell Inf Systems Ring checking hardware

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247707B (de) * 1962-05-30 1967-08-17 Telefunken Patent Anordnung zur Datensicherung im Arbeitsspeicher einer elektronischen Rechenmaschine
US3742458A (en) * 1970-09-30 1973-06-26 Yokogawa Electric Works Ltd Memory protection system providing fixed, conditional and free memory portions corresponding to ranges of memory address numbers

Also Published As

Publication number Publication date
GB1579526A (en) 1980-11-19
CA1085517A (fr) 1980-09-09
IT1110466B (it) 1985-12-23
US4093987A (en) 1978-06-06
JPS5727560B2 (fr) 1982-06-11
DE2810421A1 (de) 1978-10-05
DE2810421C2 (de) 1982-06-16
JPS53118321A (en) 1978-10-16
IT7821204A0 (it) 1978-03-15
FR2385149B1 (fr) 1981-07-31

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Legal Events

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