JPS55121521A - Data bus control system - Google Patents
Data bus control systemInfo
- Publication number
- JPS55121521A JPS55121521A JP2907379A JP2907379A JPS55121521A JP S55121521 A JPS55121521 A JP S55121521A JP 2907379 A JP2907379 A JP 2907379A JP 2907379 A JP2907379 A JP 2907379A JP S55121521 A JPS55121521 A JP S55121521A
- Authority
- JP
- Japan
- Prior art keywords
- bus
- bsav
- controller
- signal
- data
- 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
- Small-Scale Networks (AREA)
- Bus Control (AREA)
Abstract
PURPOSE: To enable continuous data transfer with the simple procedure of occupying a bus by inhibiting a controller from changing bus-service available signals while one of processors PU sends a bus-service request signal to the bus controller, in the system which has processors PU connected to the same bus and processes data at a high speed.
CONSTITUTION: Via data bus 5, PU's are connected to a memory unit, and bus controller (BC)4 controls data bus 5. Bus-service request signal BSRQ lines 6a and 6b and bus-service available signal BSAV lines 7a and 7b are connected to respective PU's. On every data transfer, transfer control circuit 8 detects its completion and generates signal 14. Then, BSRQs 6a and 6b generated by PU's are inputted to S terminals of FF circuits 9 and 10 and outputs 15 and 16 are also inputted to R terminals. Available signal control circuit 13 is that which sends its output to BSAV's 7a and 7b corresponding to BSAV's 17 and 18.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2907379A JPS5913765B2 (en) | 1979-03-13 | 1979-03-13 | Data bus control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2907379A JPS5913765B2 (en) | 1979-03-13 | 1979-03-13 | Data bus control method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55121521A true JPS55121521A (en) | 1980-09-18 |
JPS5913765B2 JPS5913765B2 (en) | 1984-03-31 |
Family
ID=12266169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2907379A Expired JPS5913765B2 (en) | 1979-03-13 | 1979-03-13 | Data bus control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5913765B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5650964U (en) * | 1976-07-15 | 1981-05-06 | ||
JPS5755439A (en) * | 1980-09-20 | 1982-04-02 | Fujitsu Ltd | Common bus control system |
US4630265A (en) * | 1984-09-26 | 1986-12-16 | General Electric Company | Method and apparatus for selecting for use between data buses in a redundant bus communication system |
JPH01119847A (en) * | 1987-11-04 | 1989-05-11 | Matsushita Electric Ind Co Ltd | Data transfer method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0543268Y2 (en) * | 1985-11-25 | 1993-10-29 |
-
1979
- 1979-03-13 JP JP2907379A patent/JPS5913765B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5650964U (en) * | 1976-07-15 | 1981-05-06 | ||
JPS5755439A (en) * | 1980-09-20 | 1982-04-02 | Fujitsu Ltd | Common bus control system |
JPH0142014B2 (en) * | 1980-09-20 | 1989-09-08 | Fujitsu Ltd | |
US4630265A (en) * | 1984-09-26 | 1986-12-16 | General Electric Company | Method and apparatus for selecting for use between data buses in a redundant bus communication system |
JPH01119847A (en) * | 1987-11-04 | 1989-05-11 | Matsushita Electric Ind Co Ltd | Data transfer method |
Also Published As
Publication number | Publication date |
---|---|
JPS5913765B2 (en) | 1984-03-31 |
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