JPS5782298A - Diagnostic system for storage device - Google Patents

Diagnostic system for storage device

Info

Publication number
JPS5782298A
JPS5782298A JP55158438A JP15843880A JPS5782298A JP S5782298 A JPS5782298 A JP S5782298A JP 55158438 A JP55158438 A JP 55158438A JP 15843880 A JP15843880 A JP 15843880A JP S5782298 A JPS5782298 A JP S5782298A
Authority
JP
Japan
Prior art keywords
storage device
address
spare
write
main storage
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
JP55158438A
Other languages
Japanese (ja)
Inventor
Yutaka Aoi
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 JP55158438A priority Critical patent/JPS5782298A/en
Publication of JPS5782298A publication Critical patent/JPS5782298A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
    • G11C29/70—Masking faults in memories by using spares or by reconfiguring

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To achieve high reliability, by the constitution that the operation of a spare storage device is diagnosed in advance before the spare storage device is made to main storage, in a storage device having a spare storage device. CONSTITUTION:A spare storage device 6 provided as a spare for a main storage device in a computer writes in a one word of write-in data signal 61 to an address designated with an address signal 60 inputted to an address decoder 601 with the control from a timing generating circuit 9 and reads out the content of the designated address as one word of readout data signal 12. This spare storage device 6 is changed over with selection circuits 3, 4, 8 and used as the main storage, but if it is not used as the main storage, a diagnostic data is outputted by a write-in data register 1, an address counter 2 outputs a diagnostic address for write-in/readout and checking is made at a comparison circuit 10.
JP55158438A 1980-11-11 1980-11-11 Diagnostic system for storage device Pending JPS5782298A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55158438A JPS5782298A (en) 1980-11-11 1980-11-11 Diagnostic system for storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55158438A JPS5782298A (en) 1980-11-11 1980-11-11 Diagnostic system for storage device

Publications (1)

Publication Number Publication Date
JPS5782298A true JPS5782298A (en) 1982-05-22

Family

ID=15671763

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55158438A Pending JPS5782298A (en) 1980-11-11 1980-11-11 Diagnostic system for storage device

Country Status (1)

Country Link
JP (1) JPS5782298A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60126755A (en) * 1983-12-13 1985-07-06 Fujitsu Denso Ltd Ram check system
JPS62298086A (en) * 1986-05-07 1987-12-25 アドバンスト・マイクロ・ディバイシズ・インコ−ポレ−テッド Integrated electronic memory circuit and electronic memory access system
JPH02210549A (en) * 1989-02-09 1990-08-21 Nec Corp Lsi self-diagnostic circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60126755A (en) * 1983-12-13 1985-07-06 Fujitsu Denso Ltd Ram check system
JPS62298086A (en) * 1986-05-07 1987-12-25 アドバンスト・マイクロ・ディバイシズ・インコ−ポレ−テッド Integrated electronic memory circuit and electronic memory access system
JPH02210549A (en) * 1989-02-09 1990-08-21 Nec Corp Lsi self-diagnostic circuit

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