JPS57198597A - Locally dual storage device - Google Patents
Locally dual storage deviceInfo
- 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
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
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)
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 |
-
1981
- 1981-05-28 JP JP56080179A patent/JPS57198597A/en active Pending
Cited By (2)
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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