JPS5475949A - Memory unit - Google Patents
Memory unitInfo
- Publication number
- JPS5475949A JPS5475949A JP14275977A JP14275977A JPS5475949A JP S5475949 A JPS5475949 A JP S5475949A JP 14275977 A JP14275977 A JP 14275977A JP 14275977 A JP14275977 A JP 14275977A JP S5475949 A JPS5475949 A JP S5475949A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- loop
- register
- counter
- rom
- 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.)
- Granted
Links
Abstract
PURPOSE: To establish the unit easy for constitution, by providing the memory storing the information of propriety of loop and the matcher collating the content of the address counter and the register, in the information loop of shift register memory.
CONSTITUTION: The infromation discriminating whether the loop of the mgnetic bubble chip 11 is normal or defective is stored in ROM 12. The data delivery initiating address from the external unit is stored in the address register 18, and the information of 8-bit is read out from the chip 11 with one period of rotating magnetic field. Simultaneously, the content of ROM 12 is read out, and if the minor loop is normal, the AND circuit 22 is opened with "0" and the address counter 16 is advanced. The agreement of the content of the counter 16 and the register 18 is detected with the matcher 17, and if it is in agreement, the FF circuit 19 is set, the AND circuit 23 is open, and data are delivered to external from the AND circuit 15. If the minor loop is defective, the output of ROM 12 is "1", the counter 16 is not advanced, and the circuit 15 is not opened.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52142759A JPS599102B2 (en) | 1977-11-30 | 1977-11-30 | memory device |
DE2817134A DE2817134C2 (en) | 1977-04-20 | 1978-04-19 | Storage control system |
US05/897,692 US4233669A (en) | 1977-04-20 | 1978-04-19 | Redundant bubble memory control system |
SE7804449A SE434686B (en) | 1977-04-20 | 1978-04-19 | Memory controller |
GB15720/78A GB1595410A (en) | 1977-04-20 | 1978-04-20 | Memory control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52142759A JPS599102B2 (en) | 1977-11-30 | 1977-11-30 | memory device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5475949A true JPS5475949A (en) | 1979-06-18 |
JPS599102B2 JPS599102B2 (en) | 1984-02-29 |
Family
ID=15322905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52142759A Expired JPS599102B2 (en) | 1977-04-20 | 1977-11-30 | memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS599102B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6148486A (en) * | 1984-08-15 | 1986-03-10 | 日本碍子株式会社 | Metal ceramic binder and manufacture |
JPS61286501A (en) * | 1985-06-12 | 1986-12-17 | Ngk Insulators Ltd | Turbine rotor and its manufacture |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4942246A (en) * | 1972-05-08 | 1974-04-20 | ||
JPS5167033A (en) * | 1974-12-09 | 1976-06-10 | Hitachi Ltd | |
JPS51118341A (en) * | 1975-04-11 | 1976-10-18 | Hitachi Ltd | Shift register type memory |
JPS5234639A (en) * | 1975-07-10 | 1977-03-16 | Texas Instruments Inc | Magnetic thin film memory |
-
1977
- 1977-11-30 JP JP52142759A patent/JPS599102B2/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4942246A (en) * | 1972-05-08 | 1974-04-20 | ||
JPS5167033A (en) * | 1974-12-09 | 1976-06-10 | Hitachi Ltd | |
JPS51118341A (en) * | 1975-04-11 | 1976-10-18 | Hitachi Ltd | Shift register type memory |
JPS5234639A (en) * | 1975-07-10 | 1977-03-16 | Texas Instruments Inc | Magnetic thin film memory |
Also Published As
Publication number | Publication date |
---|---|
JPS599102B2 (en) | 1984-02-29 |
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