JPS5613580A - Magnetic bubble memory unit - Google Patents
Magnetic bubble memory unitInfo
- Publication number
- JPS5613580A JPS5613580A JP8817079A JP8817079A JPS5613580A JP S5613580 A JPS5613580 A JP S5613580A JP 8817079 A JP8817079 A JP 8817079A JP 8817079 A JP8817079 A JP 8817079A JP S5613580 A JPS5613580 A JP S5613580A
- Authority
- JP
- Japan
- Prior art keywords
- loops
- check
- data
- information
- loop
- 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 make it possible to control a defective group without using ROM by consisting data in a housekeeping loop of a start mark part, defective information part and data check part.
CONSTITUTION: The housekeeping HK loop consists of start mark part 101, defective information part 102 and data check part 103. Mark part 101 has its start bit and end bit set to logic "0" and also has logic "1" interposed between the both and the number of "1" is made greater than the sum of the number of allowable loops and that of bits of check part 103. With regard to information part 102, the number of all loops is equalized to the number of minor loops, a string of bits corresponds to positions of minor loops and whether a loop that corresponds to its logic value is normal or not should be indicated. To check part 103, a check code is added which checks whether data of information part 102 is correct or not. Then, the place where the data check is finished is regarded as the zero position of minor loops. Consequently, information positions in minor loops can be made to correspond to addresses.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8817079A JPS5613580A (en) | 1979-07-13 | 1979-07-13 | Magnetic bubble memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8817079A JPS5613580A (en) | 1979-07-13 | 1979-07-13 | Magnetic bubble memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5613580A true JPS5613580A (en) | 1981-02-09 |
Family
ID=13935437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8817079A Pending JPS5613580A (en) | 1979-07-13 | 1979-07-13 | Magnetic bubble memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5613580A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5644185A (en) * | 1979-09-19 | 1981-04-23 | Fujitsu Ltd | Magnetic bubble memory device |
JPS59221886A (en) * | 1983-05-31 | 1984-12-13 | Fujitsu Ltd | Defective loop information storing system of magnetic bubble memory element |
JPS6161288A (en) * | 1984-08-31 | 1986-03-29 | Fujitsu Ltd | Magnetic bubble memory |
JPS61198496A (en) * | 1985-02-28 | 1986-09-02 | Fujitsu Ltd | Magnetic bubble memory device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53108735A (en) * | 1977-02-11 | 1978-09-21 | Texas Instruments Inc | Magnetic domain unit |
-
1979
- 1979-07-13 JP JP8817079A patent/JPS5613580A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53108735A (en) * | 1977-02-11 | 1978-09-21 | Texas Instruments Inc | Magnetic domain unit |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5644185A (en) * | 1979-09-19 | 1981-04-23 | Fujitsu Ltd | Magnetic bubble memory device |
JPS6160506B2 (en) * | 1979-09-19 | 1986-12-20 | Fujitsu Ltd | |
JPS59221886A (en) * | 1983-05-31 | 1984-12-13 | Fujitsu Ltd | Defective loop information storing system of magnetic bubble memory element |
JPS623510B2 (en) * | 1983-05-31 | 1987-01-26 | Fujitsu Ltd | |
JPS6161288A (en) * | 1984-08-31 | 1986-03-29 | Fujitsu Ltd | Magnetic bubble memory |
JPS6367278B2 (en) * | 1984-08-31 | 1988-12-23 | Fujitsu Ltd | |
JPS61198496A (en) * | 1985-02-28 | 1986-09-02 | Fujitsu Ltd | Magnetic bubble memory device |
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