JPS57130282A - Access control circuit for magnetic bubble memory - Google Patents

Access control circuit for magnetic bubble memory

Info

Publication number
JPS57130282A
JPS57130282A JP1549781A JP1549781A JPS57130282A JP S57130282 A JPS57130282 A JP S57130282A JP 1549781 A JP1549781 A JP 1549781A JP 1549781 A JP1549781 A JP 1549781A JP S57130282 A JPS57130282 A JP S57130282A
Authority
JP
Japan
Prior art keywords
address
writing
reading
minor
magnetic bubble
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
JP1549781A
Other languages
Japanese (ja)
Inventor
Yoshifumi Sasamoto
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 JP1549781A priority Critical patent/JPS57130282A/en
Publication of JPS57130282A publication Critical patent/JPS57130282A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect a fault point in a magnetic bubble memory without destorying storage contents by performing reading and writing at specific addresses on a minor loop which are not accessed by normal reading and writing operation.
CONSTITUTION: In normal writing and reading operation, an address signal 8 is stored in an address register 6, whole output is compared with the output of a minor address counter 5 by a minor address coincidence detecting circuit 3; when the both are coincident with each other, a function generator 2 performs writing to and reading from a storage part 1. In diagnostic mode, an address selecting circuit 4 is switched by a specific address assignment signal 9 to sent information from a fixed address register 7 to the detecting circuit 3. As a result, writing and reading at specific addresses on the monitor loop of the storage part are performed.
COPYRIGHT: (C)1982,JPO&Japio
JP1549781A 1981-02-04 1981-02-04 Access control circuit for magnetic bubble memory Pending JPS57130282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1549781A JPS57130282A (en) 1981-02-04 1981-02-04 Access control circuit for magnetic bubble memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1549781A JPS57130282A (en) 1981-02-04 1981-02-04 Access control circuit for magnetic bubble memory

Publications (1)

Publication Number Publication Date
JPS57130282A true JPS57130282A (en) 1982-08-12

Family

ID=11890438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1549781A Pending JPS57130282A (en) 1981-02-04 1981-02-04 Access control circuit for magnetic bubble memory

Country Status (1)

Country Link
JP (1) JPS57130282A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958682A (en) * 1982-09-28 1984-04-04 Fujitsu Ltd Magnetic bubble memory device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958682A (en) * 1982-09-28 1984-04-04 Fujitsu Ltd Magnetic bubble memory device

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