JPS55160386A - Bubble memory unit - Google Patents

Bubble memory unit

Info

Publication number
JPS55160386A
JPS55160386A JP6560879A JP6560879A JPS55160386A JP S55160386 A JPS55160386 A JP S55160386A JP 6560879 A JP6560879 A JP 6560879A JP 6560879 A JP6560879 A JP 6560879A JP S55160386 A JPS55160386 A JP S55160386A
Authority
JP
Japan
Prior art keywords
memory unit
access
bubble memory
driving circuit
circuit
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
JP6560879A
Other languages
Japanese (ja)
Other versions
JPS6161196B2 (en
Inventor
Takuji Okawa
Kazuo 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
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6560879A priority Critical patent/JPS55160386A/en
Publication of JPS55160386A publication Critical patent/JPS55160386A/en
Publication of JPS6161196B2 publication Critical patent/JPS6161196B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to make sure easily that access to a bubble memory unit is in process, by putting an access display method into operation by making use of a revolving-magnetic-field driving signal.
CONSTITUTION: Each bubble memory unit is provided with revolving-magnetic- field driving circuit 1, inverter 2 and display circuit 3. Now, when access to a bubble memory unit is attained, FF12 is set by drive start signal 10 of corresponding driving circuit 1 and its output makes light emitting diode 30 of display circuit 3 come on via inverter 2, showing that the access is in process. On the end of data transfer, FF12 is reset by drive stop signal 11 from driving circuit 1 and diode 30 goes off. The simple display circuit like this is attached so as to make sure easily of the access to the buffer memory unit.
COPYRIGHT: (C)1980,JPO&Japio
JP6560879A 1979-05-29 1979-05-29 Bubble memory unit Granted JPS55160386A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6560879A JPS55160386A (en) 1979-05-29 1979-05-29 Bubble memory unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6560879A JPS55160386A (en) 1979-05-29 1979-05-29 Bubble memory unit

Publications (2)

Publication Number Publication Date
JPS55160386A true JPS55160386A (en) 1980-12-13
JPS6161196B2 JPS6161196B2 (en) 1986-12-24

Family

ID=13291887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6560879A Granted JPS55160386A (en) 1979-05-29 1979-05-29 Bubble memory unit

Country Status (1)

Country Link
JP (1) JPS55160386A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5835786A (en) * 1981-08-26 1983-03-02 Hitachi Ltd Magnetic bubble memory system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4976673U (en) * 1972-10-20 1974-07-03
JPS5197416U (en) * 1975-02-04 1976-08-05
JPS5297528U (en) * 1976-01-21 1977-07-22
JPS53139948A (en) * 1977-05-13 1978-12-06 Fujitsu Ltd Data collector using magnetic bubble cassette
JPS5549309U (en) * 1978-09-19 1980-03-31

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5383631A (en) * 1976-12-29 1978-07-24 Matsushita Electric Ind Co Ltd Printer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4976673U (en) * 1972-10-20 1974-07-03
JPS5197416U (en) * 1975-02-04 1976-08-05
JPS5297528U (en) * 1976-01-21 1977-07-22
JPS53139948A (en) * 1977-05-13 1978-12-06 Fujitsu Ltd Data collector using magnetic bubble cassette
JPS5549309U (en) * 1978-09-19 1980-03-31

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5835786A (en) * 1981-08-26 1983-03-02 Hitachi Ltd Magnetic bubble memory system

Also Published As

Publication number Publication date
JPS6161196B2 (en) 1986-12-24

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