JPS54114051A - Memory protecting system - Google Patents

Memory protecting system

Info

Publication number
JPS54114051A
JPS54114051A JP2058278A JP2058278A JPS54114051A JP S54114051 A JPS54114051 A JP S54114051A JP 2058278 A JP2058278 A JP 2058278A JP 2058278 A JP2058278 A JP 2058278A JP S54114051 A JPS54114051 A JP S54114051A
Authority
JP
Japan
Prior art keywords
order
renewal
contents
address
programs
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.)
Pending
Application number
JP2058278A
Other languages
Japanese (ja)
Inventor
Yoichi Muraoka
Masao Kimura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2058278A priority Critical patent/JPS54114051A/en
Publication of JPS54114051A publication Critical patent/JPS54114051A/en
Pending legal-status Critical Current

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  • Storage Device Security (AREA)

Abstract

PURPOSE: To realize effectively the permission relation for the optional reference and others between programs and between the program and the data by giving a comparison through the access control unit between the contents of the elements within the protective table memory and the request for reference, renewal or control transfer of the order.
CONSTITUTION: At the execution of the order, the region number address to which the order belongs is known from the contents of order address register 10. Also, the region number address to which the order is going to give the reference, renewal or control shift is obtained from the contents of order operand address register 12 into which the operand part of order register 11 is stored. With use of these number addresses, access protection table memory 13 is referred to and element 14 is read out. Thus, a comparison is given between the contents of element 14 and the request for the reference, renewal or control shift of the order via access control unit 15. As a result, the permission relation can be realized effectively for the optional reference, renewal and control shift between the programs and between the program and the data.
COPYRIGHT: (C)1979,JPO&Japio
JP2058278A 1978-02-24 1978-02-24 Memory protecting system Pending JPS54114051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2058278A JPS54114051A (en) 1978-02-24 1978-02-24 Memory protecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2058278A JPS54114051A (en) 1978-02-24 1978-02-24 Memory protecting system

Publications (1)

Publication Number Publication Date
JPS54114051A true JPS54114051A (en) 1979-09-05

Family

ID=12031202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2058278A Pending JPS54114051A (en) 1978-02-24 1978-02-24 Memory protecting system

Country Status (1)

Country Link
JP (1) JPS54114051A (en)

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