JPS5522278A - Memory protection system - Google Patents
Memory protection systemInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1978
- 1978-08-04 JP JP9522678A patent/JPS5522278A/en active Pending
Cited By (4)
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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