JPS5542314A - Automatic memory restoration circuit - Google Patents
Automatic memory restoration circuitInfo
- Publication number
- JPS5542314A JPS5542314A JP11360378A JP11360378A JPS5542314A JP S5542314 A JPS5542314 A JP S5542314A JP 11360378 A JP11360378 A JP 11360378A JP 11360378 A JP11360378 A JP 11360378A JP S5542314 A JPS5542314 A JP S5542314A
- Authority
- JP
- Japan
- Prior art keywords
- contents
- address
- memory
- read
- cyclic
- 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.)
- Granted
Links
Landscapes
- Techniques For Improving Reliability Of Storages (AREA)
- Retry When Errors Occur (AREA)
- Debugging And Monitoring (AREA)
Abstract
PURPOSE: To make it possible to restore automatically the contents of a cyclic memory where the same data have been written at constant-address intervals, by utilizing that the same information resides at even intervals.
CONSTITUTION: When parity check circuit 4 detects abnormality in a l-address read from cyclic memory 1, FF201 is set and automatic restoration circuit 20 is actuated. Then, the contents at each following address with the same contents are collated by comparing and this comparative collation is continued as long as one cyclic period until the l-address read. As a result, when the contents are all equal at each even address interval, the contents are sent to memory 1 through data write gate 7 to restore the contents at the l-address. In this way, the memory contents can automatically be restored in an abnormal memory read.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11360378A JPS5542314A (en) | 1978-09-18 | 1978-09-18 | Automatic memory restoration circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11360378A JPS5542314A (en) | 1978-09-18 | 1978-09-18 | Automatic memory restoration circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5542314A true JPS5542314A (en) | 1980-03-25 |
JPS6127782B2 JPS6127782B2 (en) | 1986-06-27 |
Family
ID=14616393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11360378A Granted JPS5542314A (en) | 1978-09-18 | 1978-09-18 | Automatic memory restoration circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5542314A (en) |
-
1978
- 1978-09-18 JP JP11360378A patent/JPS5542314A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6127782B2 (en) | 1986-06-27 |
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