JPS55160385A - Additional memory control system - Google Patents

Additional memory control system

Info

Publication number
JPS55160385A
JPS55160385A JP6560779A JP6560779A JPS55160385A JP S55160385 A JPS55160385 A JP S55160385A JP 6560779 A JP6560779 A JP 6560779A JP 6560779 A JP6560779 A JP 6560779A JP S55160385 A JPS55160385 A JP S55160385A
Authority
JP
Japan
Prior art keywords
memory
memories
control
additional memory
additional
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
JP6560779A
Other languages
Japanese (ja)
Other versions
JPS6158918B2 (en
Inventor
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 JP6560779A priority Critical patent/JPS55160385A/en
Publication of JPS55160385A publication Critical patent/JPS55160385A/en
Publication of JPS6158918B2 publication Critical patent/JPS6158918B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE: To reduce greatly hardware for control over a magnetic buffer memory by allotting an additional memory for control and that for defective loop information to the same address space.
CONSTITUTION: Memory part 200 consists of additional memory 210 for control and additional memory 220 for defective loop information. Integral control part 100 is provided with selecting circuit 106 selecting addresses of both the memories and through this selecting circuit, the addresses of both the memories are stored in the same data registers A109 and B111. Thus, both the memories can be assigned to the same address space. On the basis of defective information read out from memory 220, control part 100 reads data from main magnetic buffer memory body 300 and also reads data from CPU. The control system like this can greatly reduce hardware at the circumferences of the additional memories.
COPYRIGHT: (C)1980,JPO&Japio
JP6560779A 1979-05-29 1979-05-29 Additional memory control system Granted JPS55160385A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6560779A JPS55160385A (en) 1979-05-29 1979-05-29 Additional memory control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6560779A JPS55160385A (en) 1979-05-29 1979-05-29 Additional memory control system

Publications (2)

Publication Number Publication Date
JPS55160385A true JPS55160385A (en) 1980-12-13
JPS6158918B2 JPS6158918B2 (en) 1986-12-13

Family

ID=13291862

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6560779A Granted JPS55160385A (en) 1979-05-29 1979-05-29 Additional memory control system

Country Status (1)

Country Link
JP (1) JPS55160385A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5234639A (en) * 1975-07-10 1977-03-16 Texas Instruments Inc Magnetic thin film memory
JPS53108735A (en) * 1977-02-11 1978-09-21 Texas Instruments Inc Magnetic domain unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5234639A (en) * 1975-07-10 1977-03-16 Texas Instruments Inc Magnetic thin film memory
JPS53108735A (en) * 1977-02-11 1978-09-21 Texas Instruments Inc Magnetic domain unit

Also Published As

Publication number Publication date
JPS6158918B2 (en) 1986-12-13

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