JPS55957A - Information processing system - Google Patents
Information processing systemInfo
- Publication number
- JPS55957A JPS55957A JP7440278A JP7440278A JPS55957A JP S55957 A JPS55957 A JP S55957A JP 7440278 A JP7440278 A JP 7440278A JP 7440278 A JP7440278 A JP 7440278A JP S55957 A JPS55957 A JP S55957A
- Authority
- JP
- Japan
- Prior art keywords
- bus
- master
- subordinate
- unit
- buses
- 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
- Multi Processors (AREA)
- Bus Control (AREA)
- Exchange Systems With Centralized Control (AREA)
- Small-Scale Networks (AREA)
- Hardware Redundancy (AREA)
Abstract
PURPOSE: To simplify bus connection route control when a bus gets out of order by connecting a master information processor to a master bus and subordinate information processor to a subordinate bus according to a bus mode for the data transfer between doubled information processors.
CONSTITUTION: To doubled buses 41 and 42 controlled by bus controllers 11 and 12, master and subordinate information processors 211 and 212 doubled are connected via bus adaptors 311 and 312. Buses, provided with control lines 41b and 42b prescribing the bus mode, are connected to master unit 211 and subordinate unit 21 with polarity of control lines; for example, when 41b has polarity of "1" and 42b has that of "0", the master and subordinate buses are given "1" and "0" respectively. In this case, master/subrodinate display FF9 of unit 211 indicates "1", and FF9 of unit 212 "0". If bus 41 goes wrong in this state, unit 11 detects it and performs master/subordinate switching to change bus 42 into a master bus and the troubled bus into a subordinate bus, so that unit 211 can transfer data with no change.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7440278A JPS55957A (en) | 1978-06-19 | 1978-06-19 | Information processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7440278A JPS55957A (en) | 1978-06-19 | 1978-06-19 | Information processing system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55957A true JPS55957A (en) | 1980-01-07 |
JPS5746098B2 JPS5746098B2 (en) | 1982-10-01 |
Family
ID=13546151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7440278A Granted JPS55957A (en) | 1978-06-19 | 1978-06-19 | Information processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55957A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58101701U (en) * | 1981-12-28 | 1983-07-11 | 日立工機株式会社 | Power transmission shaft rotation prevention mechanism |
JPS59201548A (en) * | 1983-04-28 | 1984-11-15 | Nec Corp | Bus changeover control system |
JPH01209541A (en) * | 1988-02-18 | 1989-08-23 | Oki Electric Ind Co Ltd | Redundant constitution system for information processor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4841650A (en) * | 1971-09-28 | 1973-06-18 |
-
1978
- 1978-06-19 JP JP7440278A patent/JPS55957A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4841650A (en) * | 1971-09-28 | 1973-06-18 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58101701U (en) * | 1981-12-28 | 1983-07-11 | 日立工機株式会社 | Power transmission shaft rotation prevention mechanism |
JPS59201548A (en) * | 1983-04-28 | 1984-11-15 | Nec Corp | Bus changeover control system |
JPH01209541A (en) * | 1988-02-18 | 1989-08-23 | Oki Electric Ind Co Ltd | Redundant constitution system for information processor |
Also Published As
Publication number | Publication date |
---|---|
JPS5746098B2 (en) | 1982-10-01 |
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