JPS54114051A - Memory protecting system - Google Patents
Memory protecting systemInfo
- 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
Links
Landscapes
- 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
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) |
-
1978
- 1978-02-24 JP JP2058278A patent/JPS54114051A/en active Pending
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