JPS5472925A - File memory system - Google Patents
File memory systemInfo
- Publication number
- JPS5472925A JPS5472925A JP14101377A JP14101377A JPS5472925A JP S5472925 A JPS5472925 A JP S5472925A JP 14101377 A JP14101377 A JP 14101377A JP 14101377 A JP14101377 A JP 14101377A JP S5472925 A JPS5472925 A JP S5472925A
- Authority
- JP
- Japan
- Prior art keywords
- controllers
- read request
- write
- controller
- file memory
- 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
Landscapes
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
PURPOSE: To shorten a processing time, by enabling a file memory unit, which can be connected to a plural number of controllers, to answer write and read request signals from each controller by being equipped with protective switches corresponding to controllers.
CONSTITUTION: Controllers 21 and 22 are provided which generate either data- write or read request signal answering command signals from electronic-computer organizations 31 and 32, and then, file memory unit 10 is provided to controllers 21 and 22 in common. This unit 10 is equipped with state control part 11, operation panel 12 and memory part 13, protective switches 40 and 50 are provided to panel 12 corresponding to controllers 21 and 22, and state control parts 11 is provided with write inhibit FFs 41 and 51, reservation state FF42, in-use display FFs 45 and 46, and the logic gate circuit. Then, it is made possible to answer a read request from either controller 21 or 22 while outputting a permit signal answering a write or read request signal from the other controller.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14101377A JPS5472925A (en) | 1977-11-22 | 1977-11-22 | File memory system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14101377A JPS5472925A (en) | 1977-11-22 | 1977-11-22 | File memory system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5472925A true JPS5472925A (en) | 1979-06-11 |
Family
ID=15282155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14101377A Pending JPS5472925A (en) | 1977-11-22 | 1977-11-22 | File memory system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5472925A (en) |
-
1977
- 1977-11-22 JP JP14101377A patent/JPS5472925A/en active Pending
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