JPS57198597A - Locally dual storage device - Google Patents

Locally dual storage device

Info

Publication number
JPS57198597A
JPS57198597A JP56080179A JP8017981A JPS57198597A JP S57198597 A JPS57198597 A JP S57198597A JP 56080179 A JP56080179 A JP 56080179A JP 8017981 A JP8017981 A JP 8017981A JP S57198597 A JPS57198597 A JP S57198597A
Authority
JP
Japan
Prior art keywords
module
storage device
detecting circuit
modules
locally
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
Application number
JP56080179A
Other languages
Japanese (ja)
Inventor
Toshiyuki Furui
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56080179A priority Critical patent/JPS57198597A/en
Publication of JPS57198597A publication Critical patent/JPS57198597A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To avoid the system breakdown, by constituting a storage device so that a required minimum number of optional modules out of plural storage modules are dual.
CONSTITUTION: A substitutional module 30 (one module is provided in the example in figure but plural modules can be provided) is provided for storage modules 31W34. Therefore, it is necessary to add some parts like a module selecting register 21, a coincidence detecting circuit 22, a substitution trouble detecting circuit 42, etc. Contents of the module selecting register 21 and contents of an address register 11 are compared with each other in the coincidence detecting circuit 22; and if the coincidence is detected, the logic of a selecting terminal S of the substitutional module 30 is set to "1" by an output 120.
COPYRIGHT: (C)1982,JPO&Japio
JP56080179A 1981-05-28 1981-05-28 Locally dual storage device Pending JPS57198597A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56080179A JPS57198597A (en) 1981-05-28 1981-05-28 Locally dual storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56080179A JPS57198597A (en) 1981-05-28 1981-05-28 Locally dual storage device

Publications (1)

Publication Number Publication Date
JPS57198597A true JPS57198597A (en) 1982-12-06

Family

ID=13711123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56080179A Pending JPS57198597A (en) 1981-05-28 1981-05-28 Locally dual storage device

Country Status (1)

Country Link
JP (1) JPS57198597A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60179860A (en) * 1984-02-27 1985-09-13 Fuji Electric Co Ltd Switching control system of storage device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60179860A (en) * 1984-02-27 1985-09-13 Fuji Electric Co Ltd Switching control system of storage device
JPH0315213B2 (en) * 1984-02-27 1991-02-28 Fuji Denki Kk

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