JPS5629732A - Bus control system - Google Patents
Bus control systemInfo
- Publication number
- JPS5629732A JPS5629732A JP10578379A JP10578379A JPS5629732A JP S5629732 A JPS5629732 A JP S5629732A JP 10578379 A JP10578379 A JP 10578379A JP 10578379 A JP10578379 A JP 10578379A JP S5629732 A JPS5629732 A JP S5629732A
- Authority
- JP
- Japan
- Prior art keywords
- bus
- unit
- signal line
- transfer
- request
- 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
- Bus Control (AREA)
- Information Transfer Systems (AREA)
- Multi Processors (AREA)
Abstract
PURPOSE: To ensure a transfer of the information in accordance with the response velocity of the unit to which the transfer of the information is requested, by detecting that the unit requesting the transfer is ranked at the highest position for use of the bus to request the transfer of the information to the requested unit and then confirming the transfer reception-enable signal sent from the requested unit.
CONSTITUTION: When several requesting units desire the use of the bus, the bus use request signal line 4 is turned to 1 via the bus request FF12. In that case, if both the data effective signal line 5 and the confirmation signal line 6 are 0 and the bus allotment signal line 9 has no bus use request from the unit having a higher priority than its own unit, the bus allotting circuit 18 changes the signal line 5 into 1 via the data effective FF15 and then turns the bus state identification signal line 3 into 1 via the bus function control circuit 13.With the request of the interlock given from the requesting unit, signal line 7 is turned into 1. Receiving this signal, the requested unit turns the interlock confirmation signal line 8 into 1 in case the interlock response is possible. And also the signal 8 is sent back to the requested unit in case the interlock is possible. After this, the requesting unit delivers the data and at the same time turns signal line 6 int 1.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10578379A JPS5629732A (en) | 1979-08-20 | 1979-08-20 | Bus control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10578379A JPS5629732A (en) | 1979-08-20 | 1979-08-20 | Bus control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5629732A true JPS5629732A (en) | 1981-03-25 |
Family
ID=14416735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10578379A Pending JPS5629732A (en) | 1979-08-20 | 1979-08-20 | Bus control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5629732A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6015764A (en) * | 1983-07-07 | 1985-01-26 | Nec Corp | Common bus control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5057347A (en) * | 1973-09-19 | 1975-05-19 | ||
| JPS51236A (en) * | 1974-06-19 | 1976-01-05 | Tokyo Electric Power Co | |
| JPS5361928A (en) * | 1976-11-16 | 1978-06-02 | Nippon Telegr & Teleph Corp <Ntt> | Data transfer system |
| JPS5462740A (en) * | 1977-10-28 | 1979-05-21 | Hitachi Ltd | Input-output controller |
-
1979
- 1979-08-20 JP JP10578379A patent/JPS5629732A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5057347A (en) * | 1973-09-19 | 1975-05-19 | ||
| JPS51236A (en) * | 1974-06-19 | 1976-01-05 | Tokyo Electric Power Co | |
| JPS5361928A (en) * | 1976-11-16 | 1978-06-02 | Nippon Telegr & Teleph Corp <Ntt> | Data transfer system |
| JPS5462740A (en) * | 1977-10-28 | 1979-05-21 | Hitachi Ltd | Input-output controller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6015764A (en) * | 1983-07-07 | 1985-01-26 | Nec Corp | Common bus control system |
| JPS6367700B2 (en) * | 1983-07-07 | 1988-12-27 | Nippon Electric Co |
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