JPS57130282A - Access control circuit for magnetic bubble memory - Google Patents
Access control circuit for magnetic bubble memoryInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5958682A (en) * | 1982-09-28 | 1984-04-04 | Fujitsu Ltd | Magnetic bubble memory device |
-
1981
- 1981-02-04 JP JP1549781A patent/JPS57130282A/en active Pending
Cited By (1)
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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