JPS53128236A - Memory protection system - Google Patents

Memory protection system

Info

Publication number
JPS53128236A
JPS53128236A JP4257777A JP4257777A JPS53128236A JP S53128236 A JPS53128236 A JP S53128236A JP 4257777 A JP4257777 A JP 4257777A JP 4257777 A JP4257777 A JP 4257777A JP S53128236 A JPS53128236 A JP S53128236A
Authority
JP
Japan
Prior art keywords
protection system
memory protection
protection region
fixed protection
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
JP4257777A
Other languages
Japanese (ja)
Other versions
JPS5925318B2 (en
Inventor
Tsuyoshi Furui
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP52042577A priority Critical patent/JPS5925318B2/en
Publication of JPS53128236A publication Critical patent/JPS53128236A/en
Publication of JPS5925318B2 publication Critical patent/JPS5925318B2/en
Expired legal-status Critical Current

Links

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  • Storage Device Security (AREA)

Abstract

PURPOSE: To avoid destruction of the memory information at the fixed protection region by releasing the writing inhibition state at the fixed protection region of the main memory only for the time during which the signal transmission is stopped periodically.
COPYRIGHT: (C)1978,JPO&Japio
JP52042577A 1977-04-15 1977-04-15 Memory protection method Expired JPS5925318B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52042577A JPS5925318B2 (en) 1977-04-15 1977-04-15 Memory protection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52042577A JPS5925318B2 (en) 1977-04-15 1977-04-15 Memory protection method

Publications (2)

Publication Number Publication Date
JPS53128236A true JPS53128236A (en) 1978-11-09
JPS5925318B2 JPS5925318B2 (en) 1984-06-16

Family

ID=12639910

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52042577A Expired JPS5925318B2 (en) 1977-04-15 1977-04-15 Memory protection method

Country Status (1)

Country Link
JP (1) JPS5925318B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62500440A (en) * 1984-10-03 1987-02-26 ナショナル・キャン・コ−ポレイション Dome forming device for forming the end wall of a container
JPS62161433A (en) * 1986-01-13 1987-07-17 Mitsuike Kogyo Kk Method and device for removing foreign matter from press due

Also Published As

Publication number Publication date
JPS5925318B2 (en) 1984-06-16

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