JPS5476117A - Diagnosis system of error correction circuit - Google Patents
Diagnosis system of error correction circuitInfo
- Publication number
- JPS5476117A JPS5476117A JP14258777A JP14258777A JPS5476117A JP S5476117 A JPS5476117 A JP S5476117A JP 14258777 A JP14258777 A JP 14258777A JP 14258777 A JP14258777 A JP 14258777A JP S5476117 A JPS5476117 A JP S5476117A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- error correction
- error
- track
- pointer
- 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 facilitate diagnosis of an error track pointer by setting all the error correction track signals formed from syndromes at a constant value and forcefully applying the correction instruction signal of an error over two tracks.
CONSTITUTION: When a pointer diagnosis signal I is applied, the outputs of a syndrome comparator 3, i.e., error correction track signals B, all become the signal of a preset value, e.g., all "1". At the same time, an inversion signal is applied to AND 4 via NOT 16 and therefore the AND 4 is held de-energized during this time. Further the signal I is applied to AND 5 via OR 14 and two track errors occur and it becomes as if the error correction signal H has been applied to the AND 5. Hence, in this case, all the error correction track signals B become a specified value, all "1" signal, etc. and therefore, the error correction signal D' becomes based only on the output signal F of an error track pointer 11 and if the data E having been error- corrected by the signal D' is examined, the diagnosis of the pointer 11 may be performed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14258777A JPS5476117A (en) | 1977-11-30 | 1977-11-30 | Diagnosis system of error correction circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14258777A JPS5476117A (en) | 1977-11-30 | 1977-11-30 | Diagnosis system of error correction circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5476117A true JPS5476117A (en) | 1979-06-18 |
Family
ID=15318768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14258777A Pending JPS5476117A (en) | 1977-11-30 | 1977-11-30 | Diagnosis system of error correction circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5476117A (en) |
-
1977
- 1977-11-30 JP JP14258777A patent/JPS5476117A/en active Pending
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