JPS5587397A - Memory device - Google Patents
Memory deviceInfo
- Publication number
- JPS5587397A JPS5587397A JP16042178A JP16042178A JPS5587397A JP S5587397 A JPS5587397 A JP S5587397A JP 16042178 A JP16042178 A JP 16042178A JP 16042178 A JP16042178 A JP 16042178A JP S5587397 A JPS5587397 A JP S5587397A
- Authority
- JP
- Japan
- Prior art keywords
- data
- check bit
- register
- time
- cpu
- 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
- Detection And Correction Of Errors (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE: To eliminate the delay time caused by generation of the check bit and thus to reduce the writing cycle time by preventing the time to generate the check bit from being added to the writing cycle time of the memory device.
CONSTITUTION: When the writing address and the data are transferred to registers 3 and 4 respectively from the CPU, the data is transferred to generator 5 from register 4 to generate the check bit corresponding to the data. At the same time, the data is written to the fixed address of memory part 1, and the check bit at the preceding data writing time is written into memory part 2 via register 6. And with application of the reading address from the CPU, both the data and the check bit are read out of each memory part to be supplied to error check circuit 11 and register 13. And thus the error, if any, is corrected and then transferred to the CPU from register 13.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16042178A JPS5587397A (en) | 1978-12-25 | 1978-12-25 | Memory device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16042178A JPS5587397A (en) | 1978-12-25 | 1978-12-25 | Memory device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5587397A true JPS5587397A (en) | 1980-07-02 |
Family
ID=15714554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16042178A Pending JPS5587397A (en) | 1978-12-25 | 1978-12-25 | Memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5587397A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5263030A (en) * | 1991-02-13 | 1993-11-16 | Digital Equipment Corporation | Method and apparatus for encoding data for storage on magnetic tape |
-
1978
- 1978-12-25 JP JP16042178A patent/JPS5587397A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5263030A (en) * | 1991-02-13 | 1993-11-16 | Digital Equipment Corporation | Method and apparatus for encoding data for storage on magnetic tape |
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