JPS6448152A - Memory write protection system - Google Patents
Memory write protection systemInfo
- Publication number
- JPS6448152A JPS6448152A JP62205430A JP20543087A JPS6448152A JP S6448152 A JPS6448152 A JP S6448152A JP 62205430 A JP62205430 A JP 62205430A JP 20543087 A JP20543087 A JP 20543087A JP S6448152 A JPS6448152 A JP S6448152A
- Authority
- JP
- Japan
- Prior art keywords
- storage device
- address
- current system
- stand
- write
- 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
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE:To prevent the abnormal state of a storage device of the current system from having an influence upon a storage device of the stand-by system by inhibiting the write to an address, which corresponds to the address from which abnormal data is read of the storage device of the current system, of the storage device of the stand-by system by a central processing unit of the current system. CONSTITUTION:An abnormality address storage means 200, a comparing means 300, and an inhibiting means 400 are provided, and the address of a storage device 2-0 from which data is read out is stored in the means 200 if error is detected in this data read from the storage device 2-0 of the current system by a check means 100, and the means 300 compares the write address, which a central processing unit 1-0 of the current system outputs for the purpose of writing the same data in storage devices of the current system and the stand-by system, with the address stored in the abnormality address storage means 200, and the means 400 inhibits the write to the storage device 2-1 of the stand-by system at the time of detecting coincidence between both addresses. Thus, the write to the address from which abnormal data is read of the storage device of the current system is inhibited to prevent abnormal data from being written in the storage device of the stand-by system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62205430A JPS6448152A (en) | 1987-08-19 | 1987-08-19 | Memory write protection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62205430A JPS6448152A (en) | 1987-08-19 | 1987-08-19 | Memory write protection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6448152A true JPS6448152A (en) | 1989-02-22 |
Family
ID=16506728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62205430A Pending JPS6448152A (en) | 1987-08-19 | 1987-08-19 | Memory write protection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6448152A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0683717A (en) * | 1992-02-14 | 1994-03-25 | Internatl Business Mach Corp <Ibm> | Large fault-resistant nonvolatile plural port memories |
JP2008049252A (en) * | 2006-08-24 | 2008-03-06 | Daikin Ind Ltd | Air conditioner |
US8391585B2 (en) | 2006-12-28 | 2013-03-05 | Sharp Kabushiki Kaisha | Defect detecting device, defect detecting method, image sensor device, image sensor module, defect detecting program, and computer-readable recording medium |
-
1987
- 1987-08-19 JP JP62205430A patent/JPS6448152A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0683717A (en) * | 1992-02-14 | 1994-03-25 | Internatl Business Mach Corp <Ibm> | Large fault-resistant nonvolatile plural port memories |
JP2008049252A (en) * | 2006-08-24 | 2008-03-06 | Daikin Ind Ltd | Air conditioner |
US8391585B2 (en) | 2006-12-28 | 2013-03-05 | Sharp Kabushiki Kaisha | Defect detecting device, defect detecting method, image sensor device, image sensor module, defect detecting program, and computer-readable recording medium |
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