JPS5651081A - Bubble memory device - Google Patents

Bubble memory device

Info

Publication number
JPS5651081A
JPS5651081A JP12762379A JP12762379A JPS5651081A JP S5651081 A JPS5651081 A JP S5651081A JP 12762379 A JP12762379 A JP 12762379A JP 12762379 A JP12762379 A JP 12762379A JP S5651081 A JPS5651081 A JP S5651081A
Authority
JP
Japan
Prior art keywords
failed
information
chip
failed information
chips
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
JP12762379A
Other languages
Japanese (ja)
Inventor
Hiroshi Murakami
Hideki Obara
Hajime Nagai
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12762379A priority Critical patent/JPS5651081A/en
Publication of JPS5651081A publication Critical patent/JPS5651081A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable the restorage of failed information, even if the failed information stored in the chip is disturbed due to failure of power supply or the like, by storing the failed information in a plurality of bubble memory elements into a bubble memory element.
CONSTITUTION: A failed information corresponding to a failed minor loop every chip is written in memory locations P11WP51 of loops m1Wm5 and 4 sets of bubble memory element chips a, b... formed with minor loops m0Wm5 respectively. Further, the information is used as the mask information for failed minor loop and on and after the memory device P22 of each chip, failed information data of the chip and the failed information data for other chips succeeded to it are written in. At the normal use after the application of power, the readout failed information for the chips a, b... is compared. If a half or more is in agreement with each other, after clearing the information to the chip where disagreement failed information is stored according to the failed information of chip storing the failed information in agreement, the failed information can be restored, allowing to use the failed chips and to make ease of chip formation.
COPYRIGHT: (C)1981,JPO&Japio
JP12762379A 1979-10-02 1979-10-02 Bubble memory device Pending JPS5651081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12762379A JPS5651081A (en) 1979-10-02 1979-10-02 Bubble memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12762379A JPS5651081A (en) 1979-10-02 1979-10-02 Bubble memory device

Publications (1)

Publication Number Publication Date
JPS5651081A true JPS5651081A (en) 1981-05-08

Family

ID=14964657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12762379A Pending JPS5651081A (en) 1979-10-02 1979-10-02 Bubble memory device

Country Status (1)

Country Link
JP (1) JPS5651081A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182531A (en) * 1974-12-27 1976-07-20 Nippon Electric Co
JPS53108735A (en) * 1977-02-11 1978-09-21 Texas Instruments Inc Magnetic domain unit
JPS5459038A (en) * 1977-10-20 1979-05-12 Nec Corp Magnetic bubble memory device
JPS54109728A (en) * 1978-02-17 1979-08-28 Hitachi Ltd Memory device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182531A (en) * 1974-12-27 1976-07-20 Nippon Electric Co
JPS53108735A (en) * 1977-02-11 1978-09-21 Texas Instruments Inc Magnetic domain unit
JPS5459038A (en) * 1977-10-20 1979-05-12 Nec Corp Magnetic bubble memory device
JPS54109728A (en) * 1978-02-17 1979-08-28 Hitachi Ltd Memory device

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