JPS56134398A - Check system for error detecting and correcting circuit - Google Patents

Check system for error detecting and correcting circuit

Info

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
Application number
JP3583780A
Other languages
Japanese (ja)
Inventor
Takashi Hiraoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3583780A priority Critical patent/JPS56134398A/en
Publication of JPS56134398A publication Critical patent/JPS56134398A/en
Pending legal-status Critical Current

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)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Detection And Correction Of Errors (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.
JP3583780A 1980-03-21 1980-03-21 Check system for error detecting and correcting circuit Pending JPS56134398A (en)

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)

Similar Documents

Publication Publication Date Title
JPS56134398A (en) Check system for error detecting and correcting circuit
JPS5744294A (en) Alternating memory control system
JPS5710846A (en) Information processing equipment
JPS5211829A (en) Memory control unit
JPS623520B2 (en)
JPS55163697A (en) Memory device
JPS57127997A (en) Semiconductor integrated storage device
JPS5634194A (en) Memory unit
JPS6454557A (en) Address parity checking circuit
JPS55122299A (en) Memory unit
JPS5374849A (en) Checking method for writing data
JPS578999A (en) Memory controller
JPS5637899A (en) Memory malfunction detection system
JPS5727342A (en) Error checking system for error detecting correcting circuit
JPS5557962A (en) Error detection system
JPS5797171A (en) Word processor
JPS5310412A (en) Erroneous data-writing operation preventive system
JPS5798197A (en) Multiplexing memory device
JPS52147028A (en) Error detection unit for memory
JPS57763A (en) External memory device
JPS5370729A (en) Memory unit
JPS57180000A (en) Main storage device
JPS5353932A (en) Fault detection system for memory address line
JPS56156981A (en) Bubble memory device
JPS6426938A (en) Test system for ras circuit