JPS56163600A - Memory control system - Google Patents

Memory control system

Info

Publication number
JPS56163600A
JPS56163600A JP6737180A JP6737180A JPS56163600A JP S56163600 A JPS56163600 A JP S56163600A JP 6737180 A JP6737180 A JP 6737180A JP 6737180 A JP6737180 A JP 6737180A JP S56163600 A JPS56163600 A JP S56163600A
Authority
JP
Japan
Prior art keywords
memory
data
substitute
cpu
error
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
JP6737180A
Other languages
Japanese (ja)
Inventor
Tokuji Furuto
Moriyuki Takamura
Shohei Ikehara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6737180A priority Critical patent/JPS56163600A/en
Publication of JPS56163600A publication Critical patent/JPS56163600A/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
    • G06F11/16—Error detection or correction of the data by redundancy in hardware

Abstract

PURPOSE:To use the 1st memory, by giving a reading to the 1st memory after writing the prescribed data into a substitute memory and then cancelling the substitution of the substitute memory after making sure that an error of the substitute memory has been recovered. CONSTITUTION:The error existing at a storage part 1 during a periodical diagnosis or when an access is given from a CPU is detected by a syndrome calculating circuit 9. Then the error bit is held at a substitute memory control circuit 16. The circuit 16 reads the storage contents of the corresponding bits of all addresses corresponding to the error bit. This storage contents is corrected by a data correcting circuit 11, and the correction data is written into the part 1 via the CPU as well as into the substitute memory 2. For a normal access after an action of substitution, the write data is written into the part 1 and the memory 2, and the read data is read out of the memory 2 to be sent to the CPU.
JP6737180A 1980-05-21 1980-05-21 Memory control system Pending JPS56163600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6737180A JPS56163600A (en) 1980-05-21 1980-05-21 Memory control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6737180A JPS56163600A (en) 1980-05-21 1980-05-21 Memory control system

Publications (1)

Publication Number Publication Date
JPS56163600A true JPS56163600A (en) 1981-12-16

Family

ID=13343080

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6737180A Pending JPS56163600A (en) 1980-05-21 1980-05-21 Memory control system

Country Status (1)

Country Link
JP (1) JPS56163600A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993011491A1 (en) * 1991-11-30 1993-06-10 Kabushiki Kaisha Toshiba Memory card device
US6502049B1 (en) 1998-12-02 2002-12-31 Kikusui Chemical Industries Co., Ltd. User's color matching system, thinned pigment dispersion set for color matching, paint color matching method, color matching data base for user and method of using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993011491A1 (en) * 1991-11-30 1993-06-10 Kabushiki Kaisha Toshiba Memory card device
US5483491A (en) * 1991-11-30 1996-01-09 Kabushiki Kaisha Toshiba Memory card device
US6502049B1 (en) 1998-12-02 2002-12-31 Kikusui Chemical Industries Co., Ltd. User's color matching system, thinned pigment dispersion set for color matching, paint color matching method, color matching data base for user and method of using the same

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