JPS56134398A - Check system for error detecting and correcting circuit - Google Patents
Check system for error detecting and correcting circuitInfo
- Publication number
- JPS56134398A JPS56134398A JP3583780A JP3583780A JPS56134398A JP S56134398 A JPS56134398 A JP S56134398A JP 3583780 A JP3583780 A JP 3583780A JP 3583780 A JP3583780 A JP 3583780A JP S56134398 A JPS56134398 A JP S56134398A
- Authority
- JP
- Japan
- Prior art keywords
- check bit
- circuit
- memory
- register
- error detecting
- 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Detection And Correction Of Errors (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE:To check an error detecting and correcting circuit in a state close to its actual operation, by freely selecting a check bit from a check bit generating circuit or that set optionally via CPU. CONSTITUTION:For normal operation, write data latched in write data register 111 is sent to memory 200 and also inputted to check bit generating circuit 113, a check bit from which is supplied to memory 200 via check bit selecting circuit 114. On the other hand, when error detecting and checking circuit 117 is checked, a check bit set by CPU100 is latched in write check bit register 112 and selected by circuit 114 to be sent to memory 200, and data is supplied via register 11. Then, the check bit and read data read out of memory 200 are applied to circuit 117 via check bit register 115 and read data register 116, so that the error correcting circuit will be checked in a state similar to normal memory access.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3583780A JPS56134398A (en) | 1980-03-21 | 1980-03-21 | Check system for error detecting and correcting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3583780A JPS56134398A (en) | 1980-03-21 | 1980-03-21 | Check system for error detecting and correcting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56134398A true JPS56134398A (en) | 1981-10-21 |
Family
ID=12453081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3583780A Pending JPS56134398A (en) | 1980-03-21 | 1980-03-21 | Check system for error detecting and correcting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56134398A (en) |
-
1980
- 1980-03-21 JP JP3583780A patent/JPS56134398A/en active Pending
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