JPS5750395A - Adding system of check bit - Google Patents

Adding system of check bit

Info

Publication number
JPS5750395A
JPS5750395A JP55123498A JP12349880A JPS5750395A JP S5750395 A JPS5750395 A JP S5750395A JP 55123498 A JP55123498 A JP 55123498A JP 12349880 A JP12349880 A JP 12349880A JP S5750395 A JPS5750395 A JP S5750395A
Authority
JP
Japan
Prior art keywords
address
bits
check
check bit
rom
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
JP55123498A
Other languages
Japanese (ja)
Inventor
Yukitomo Koyama
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 JP55123498A priority Critical patent/JPS5750395A/en
Publication of JPS5750395A publication Critical patent/JPS5750395A/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)
  • Detection And Correction Of Errors (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To realize the highly efficient use of a checking ROM, by selecting the check bit groups in the same address of a checking ROM which receives the common designation by a part of the address in accordance with the residual addresses. CONSTITUTION:The address designation is carried out for an ROM31 of 32 words and 8 bits, etc. via an addrsss bus line 41. The check bit groups related to plural pieces of information which are set en bloc in the same address of a parity ROM32 of 4 words and 8 bits, etc. receive the common designation by the upper bits of the address designated by the line 41. Then the check parity bits corresponding to the information of the ROM31 designated by a selector 42 are selected in accordance with the residual bits of the address. In such constitution, the entire region of the ROM32 can be used to increase the using efficiency of a check ROM.
JP55123498A 1980-09-08 1980-09-08 Adding system of check bit Pending JPS5750395A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55123498A JPS5750395A (en) 1980-09-08 1980-09-08 Adding system of check bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55123498A JPS5750395A (en) 1980-09-08 1980-09-08 Adding system of check bit

Publications (1)

Publication Number Publication Date
JPS5750395A true JPS5750395A (en) 1982-03-24

Family

ID=14862104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55123498A Pending JPS5750395A (en) 1980-09-08 1980-09-08 Adding system of check bit

Country Status (1)

Country Link
JP (1) JPS5750395A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58169399A (en) * 1982-03-30 1983-10-05 Fujitsu Ltd Storage device provided with parity check
JPS59213100A (en) * 1983-05-16 1984-12-01 Nippon Telegr & Teleph Corp <Ntt> Semiconductor storage device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58169399A (en) * 1982-03-30 1983-10-05 Fujitsu Ltd Storage device provided with parity check
JPS6230663B2 (en) * 1982-03-30 1987-07-03 Fujitsu Ltd
JPS59213100A (en) * 1983-05-16 1984-12-01 Nippon Telegr & Teleph Corp <Ntt> Semiconductor storage device
JPS6240798B2 (en) * 1983-05-16 1987-08-31 Nippon Telegraph & Telephone

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