JPS55162162A - Diagnostic system for error detecting-correcting circuit - Google Patents
Diagnostic system for error detecting-correcting circuitInfo
- Publication number
- JPS55162162A JPS55162162A JP6991179A JP6991179A JPS55162162A JP S55162162 A JPS55162162 A JP S55162162A JP 6991179 A JP6991179 A JP 6991179A JP 6991179 A JP6991179 A JP 6991179A JP S55162162 A JPS55162162 A JP S55162162A
- Authority
- JP
- Japan
- Prior art keywords
- error
- data
- circuit
- corrected
- ecc
- 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)
Abstract
PURPOSE: To make it possible to diagnose the normalcy of the functions of detecting and correcting errors by generating artificial error data and by checking whether the error of the data can be detected and corrected.
CONSTITUTION: From maintenance panel 11, error correcting code ECC is transferred to ECC buffer 21 in addition to write data. The ECC is selected generating error data intentionally and it is written on a magnetic tape together with data from write data buffer 12 so as to generate the error data artificially. The group of data is supplied to error detecting-cirrecting circuit 17 via the magnetic tape to output information on whether an error exists and whether it can be corrected when so, or a corrected data group to diagnosing circuit 23. Further, a correctable error signal is sent to line 24, and an uncorrectable error signal to line 25. Circuit 23 is supplied with the output of selector 14 and signal on what kind of error has been set from panel 11. On the basis of those signals, circuit 23 checks whether circuit 17 functions normally.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6991179A JPS55162162A (en) | 1979-06-06 | 1979-06-06 | Diagnostic system for error detecting-correcting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6991179A JPS55162162A (en) | 1979-06-06 | 1979-06-06 | Diagnostic system for error detecting-correcting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55162162A true JPS55162162A (en) | 1980-12-17 |
Family
ID=13416344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6991179A Pending JPS55162162A (en) | 1979-06-06 | 1979-06-06 | Diagnostic system for error detecting-correcting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55162162A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01134763A (en) * | 1987-11-19 | 1989-05-26 | Fujitsu Ltd | Diagnosing system for alternating processing for optical disk control device |
JPH01227275A (en) * | 1988-03-08 | 1989-09-11 | Nec Corp | Magnetic disk controller |
US5631915A (en) * | 1995-03-31 | 1997-05-20 | International Business Machines Corporation | Method of correcting single errors |
-
1979
- 1979-06-06 JP JP6991179A patent/JPS55162162A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01134763A (en) * | 1987-11-19 | 1989-05-26 | Fujitsu Ltd | Diagnosing system for alternating processing for optical disk control device |
JPH01227275A (en) * | 1988-03-08 | 1989-09-11 | Nec Corp | Magnetic disk controller |
US5631915A (en) * | 1995-03-31 | 1997-05-20 | International Business Machines Corporation | Method of correcting single errors |
US5774481A (en) * | 1995-03-31 | 1998-06-30 | International Business Machines Corporation | Reduced gate error detection and correction circuit |
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