JPS5635254A - Processor back-up system - Google Patents
Processor back-up systemInfo
- Publication number
- JPS5635254A JPS5635254A JP11000079A JP11000079A JPS5635254A JP S5635254 A JPS5635254 A JP S5635254A JP 11000079 A JP11000079 A JP 11000079A JP 11000079 A JP11000079 A JP 11000079A JP S5635254 A JPS5635254 A JP S5635254A
- Authority
- JP
- Japan
- Prior art keywords
- cpu1
- mode
- collation
- cpu
- access
- 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
Links
Landscapes
- Hardware Redundancy (AREA)
- Multi Processors (AREA)
Abstract
PURPOSE: To enhance the reliability of the processor back-up system and also ensure an effective use of the function of each CPU, by giving the dual working to the system with the specified task requiring the back-up and then executing process by each CPU for the task requiring no back-up respectively.
CONSTITUTION: The CPU1 and 3 of the processor system A and B execute usually the different tasks TA and TB and in a quite independent way. Now if the synchronous interruption is produced to secure the synchronous mode S, both the CPU1 and 3 execute the synchronized and common specified task TS. Under the mode S, the common input/output unit 10 or 11 receives an access. And thus the accesses from the CPU1 and 3 receive a collation by the bus collating circuit 72 and along with the address information and the data information. And only a coincidence is obtained through the collation, an access is given to the unit 10 or 11. Then the back-up process is carried out in the dual mode and by the CPU1 and 3. And an individual process is carried out when the mode S is cancelled.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54110000A JPS5843775B2 (en) | 1979-08-29 | 1979-08-29 | Processor backup system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54110000A JPS5843775B2 (en) | 1979-08-29 | 1979-08-29 | Processor backup system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5635254A true JPS5635254A (en) | 1981-04-07 |
JPS5843775B2 JPS5843775B2 (en) | 1983-09-29 |
Family
ID=14524548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54110000A Expired JPS5843775B2 (en) | 1979-08-29 | 1979-08-29 | Processor backup system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5843775B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6041163A (en) * | 1983-08-16 | 1985-03-04 | Nec Corp | Synchronous operating method of duplex microprocessor |
JPS6364134A (en) * | 1986-09-04 | 1988-03-22 | Matsushita Commun Ind Co Ltd | Network system stopping system |
JPH03278238A (en) * | 1990-03-28 | 1991-12-09 | Nec Corp | Mutual hot stand-by system |
US6334194B1 (en) | 1997-11-07 | 2001-12-25 | Nec Corporation | Fault tolerant computer employing double-redundant structure |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6118043B2 (en) * | 2012-07-18 | 2017-04-19 | 矢崎総業株式会社 | Display device |
-
1979
- 1979-08-29 JP JP54110000A patent/JPS5843775B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6041163A (en) * | 1983-08-16 | 1985-03-04 | Nec Corp | Synchronous operating method of duplex microprocessor |
JPS6364134A (en) * | 1986-09-04 | 1988-03-22 | Matsushita Commun Ind Co Ltd | Network system stopping system |
JPH03278238A (en) * | 1990-03-28 | 1991-12-09 | Nec Corp | Mutual hot stand-by system |
US6334194B1 (en) | 1997-11-07 | 2001-12-25 | Nec Corporation | Fault tolerant computer employing double-redundant structure |
Also Published As
Publication number | Publication date |
---|---|
JPS5843775B2 (en) | 1983-09-29 |
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