JPS5475949A - Memory unit - Google Patents

Memory unit

Info

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
Application number
JP14275977A
Other languages
Japanese (ja)
Other versions
JPS599102B2 (en
Inventor
Kazuo Furukawa
Sumio Furukawa
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP52142759A priority Critical patent/JPS599102B2/en
Priority to DE2817134A priority patent/DE2817134C2/en
Priority to US05/897,692 priority patent/US4233669A/en
Priority to SE7804449A priority patent/SE434686B/en
Priority to GB15720/78A priority patent/GB1595410A/en
Publication of JPS5475949A publication Critical patent/JPS5475949A/en
Publication of JPS599102B2 publication Critical patent/JPS599102B2/en
Expired legal-status Critical Current

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
JP52142759A 1977-04-20 1977-11-30 memory device Expired JPS599102B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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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