JPS5522278A - Memory protection system - Google Patents

Memory protection system

Info

Publication number
JPS5522278A
JPS5522278A JP9522678A JP9522678A JPS5522278A JP S5522278 A JPS5522278 A JP S5522278A JP 9522678 A JP9522678 A JP 9522678A JP 9522678 A JP9522678 A JP 9522678A JP S5522278 A JPS5522278 A JP S5522278A
Authority
JP
Japan
Prior art keywords
program
access
exists
register
order
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
JP9522678A
Other languages
Japanese (ja)
Inventor
Shigehira Shindou
Mitsuhiro Inagaki
Mamoru Wakagi
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 JP9522678A priority Critical patent/JPS5522278A/en
Publication of JPS5522278A publication Critical patent/JPS5522278A/en
Pending legal-status Critical Current

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  • Storage Device Security (AREA)

Abstract

PURPOSE:To prevent the unexpected access and thus to improve protection of the memory by deciding the propriety of access by the both sides of the program and the access request is given from the program to the data or the program of the memroy. CONSTITUTION:In case the execution order is given for the program within the information processor, whether the data stored in order operand register 6 or identifier 20 exists in C table 7 provided at the program side is decided. And furthermore, whether it, if exists, is allowable or not is decided at comparators 9 and 10 along with whether the access types (reference, renewal, control shift or others) of the present request stored in order register 5 is allowable or not. In addition, whether identifier 14 stored in program base register 4 exists in A table 8 provided at the program side along with whether the access types mentioned above of register 5 is allowable or not in case 14 exists are decided by comparators 11 and 12. Then in case all the above factors are allowavle, access control circuit 13 permits execution of this order.
JP9522678A 1978-08-04 1978-08-04 Memory protection system Pending JPS5522278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9522678A JPS5522278A (en) 1978-08-04 1978-08-04 Memory protection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9522678A JPS5522278A (en) 1978-08-04 1978-08-04 Memory protection system

Publications (1)

Publication Number Publication Date
JPS5522278A true JPS5522278A (en) 1980-02-16

Family

ID=14131833

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9522678A Pending JPS5522278A (en) 1978-08-04 1978-08-04 Memory protection system

Country Status (1)

Country Link
JP (1) JPS5522278A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5881125A (en) * 1981-11-09 1983-05-16 Sumitomo Bakelite Co Ltd Manufacture of fan cover of reinforced plastic
JPS62157901A (en) * 1985-12-28 1987-07-13 Yamatake Honeywell Co Ltd Controller
JPS62157902A (en) * 1985-12-28 1987-07-13 Yamatake Honeywell Co Ltd Controller
JPH09290600A (en) * 1996-04-26 1997-11-11 一郎 ▲吉▼村 Ornament and manufacture thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5881125A (en) * 1981-11-09 1983-05-16 Sumitomo Bakelite Co Ltd Manufacture of fan cover of reinforced plastic
JPS62157901A (en) * 1985-12-28 1987-07-13 Yamatake Honeywell Co Ltd Controller
JPS62157902A (en) * 1985-12-28 1987-07-13 Yamatake Honeywell Co Ltd Controller
JPH09290600A (en) * 1996-04-26 1997-11-11 一郎 ▲吉▼村 Ornament and manufacture thereof

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