JPS5654562A - Competing circuit - Google Patents
Competing circuitInfo
- Publication number
- JPS5654562A JPS5654562A JP13018779A JP13018779A JPS5654562A JP S5654562 A JPS5654562 A JP S5654562A JP 13018779 A JP13018779 A JP 13018779A JP 13018779 A JP13018779 A JP 13018779A JP S5654562 A JPS5654562 A JP S5654562A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- request
- signal
- output
- signals
- 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
- Multi Processors (AREA)
- Bus Control (AREA)
Abstract
PURPOSE: To select a request signal effectively by selecting one signal while holding the others in a queue when signal processors request to use a shared source, such as a shared data file, simultaneously.
CONSTITUTION: For example, request input signals r1 and r2 of request signal input lines 1 and 2 are held at level "1" in the same sampling period. Counters 21 and 22 receives clock signals to hold output lines at "1" and further holds AND circuits 24 and 25, and 27 and 28 at "1". Their outputs are inputted to NOR circuit 34, which generates an output of "0" to close AND circuit 45, so that the output of clock circuit 46 will be stopped. On the other hand, outputs of NAND circuits 30 and 31 show "0" and use request signal "1" is outputted from NAND circuit 33. Consequently, when use request signals are generated at a time, one of them is selected and the others are held in a queue. Consequently effective signal selection can be carried out.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13018779A JPS5654562A (en) | 1979-10-09 | 1979-10-09 | Competing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13018779A JPS5654562A (en) | 1979-10-09 | 1979-10-09 | Competing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5654562A true JPS5654562A (en) | 1981-05-14 |
Family
ID=15028149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13018779A Pending JPS5654562A (en) | 1979-10-09 | 1979-10-09 | Competing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5654562A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58129567A (en) * | 1982-01-27 | 1983-08-02 | Nec Corp | Multi-system control device |
JPS58129565A (en) * | 1982-01-27 | 1983-08-02 | Nec Corp | Multi-system control device |
JPH06161952A (en) * | 1990-07-03 | 1994-06-10 | Internatl Business Mach Corp <Ibm> | Arbitration device of access request |
-
1979
- 1979-10-09 JP JP13018779A patent/JPS5654562A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58129567A (en) * | 1982-01-27 | 1983-08-02 | Nec Corp | Multi-system control device |
JPS58129565A (en) * | 1982-01-27 | 1983-08-02 | Nec Corp | Multi-system control device |
JPS6334499B2 (en) * | 1982-01-27 | 1988-07-11 | Nippon Electric Co | |
JPH06161952A (en) * | 1990-07-03 | 1994-06-10 | Internatl Business Mach Corp <Ibm> | Arbitration device of access request |
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