JPS54121632A - Interruption request system - Google Patents
Interruption request systemInfo
- Publication number
- JPS54121632A JPS54121632A JP2954878A JP2954878A JPS54121632A JP S54121632 A JPS54121632 A JP S54121632A JP 2954878 A JP2954878 A JP 2954878A JP 2954878 A JP2954878 A JP 2954878A JP S54121632 A JPS54121632 A JP S54121632A
- Authority
- JP
- Japan
- Prior art keywords
- bus
- signal
- idle
- interruption request
- interruption
- 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
- Bus Control (AREA)
- Small-Scale Networks (AREA)
Abstract
PURPOSE: To reduce the number of the interruption request signal line by transmitting the bus idle signal showing the idle state of the common bus from the bus arbiter and monitoring the idle signal through each device to put the interruption request signal on the data bus.
CONSTITUTION: Bus arbiter BA generates the bus idle signal when common bus C-BUS is idle and then puts the signal on bus idle signal line BIL. Each device DVC1 always monitors BIL, and the device requesting the interruption puts the interruption request signal on DB when the bus idle signal emerges in such way that the level of the interruption request is made to correspond to the specified bit of data bus DB to transfer the request signal to central process unit CPU. The CPU decides that the signal on DB is the interruption request signal when the bus idle signal is emerging to carry out the interruption process. Thus, the number of the interruption request signal line with use of BIL.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53029548A JPS6041782B2 (en) | 1978-03-14 | 1978-03-14 | Interrupt request method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53029548A JPS6041782B2 (en) | 1978-03-14 | 1978-03-14 | Interrupt request method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54121632A true JPS54121632A (en) | 1979-09-20 |
JPS6041782B2 JPS6041782B2 (en) | 1985-09-18 |
Family
ID=12279178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53029548A Expired JPS6041782B2 (en) | 1978-03-14 | 1978-03-14 | Interrupt request method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6041782B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833770A (en) * | 1981-08-24 | 1983-02-28 | Sony Corp | Program transfer method for digital data |
JPS61101898A (en) * | 1984-10-25 | 1986-05-20 | 松下電工株式会社 | Data transmission system for automatic fire alarm system |
WO2002099662A1 (en) * | 2001-05-30 | 2002-12-12 | Matsushita Electric Industrial Co., Ltd. | Transmission apparatus and tramsmission method |
-
1978
- 1978-03-14 JP JP53029548A patent/JPS6041782B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833770A (en) * | 1981-08-24 | 1983-02-28 | Sony Corp | Program transfer method for digital data |
JPH0429102B2 (en) * | 1981-08-24 | 1992-05-18 | ||
JPS61101898A (en) * | 1984-10-25 | 1986-05-20 | 松下電工株式会社 | Data transmission system for automatic fire alarm system |
WO2002099662A1 (en) * | 2001-05-30 | 2002-12-12 | Matsushita Electric Industrial Co., Ltd. | Transmission apparatus and tramsmission method |
US7421527B2 (en) | 2001-05-30 | 2008-09-02 | Matsushita Electric Industrial Co., Ltd. | Transmission apparatus and transmission method |
Also Published As
Publication number | Publication date |
---|---|
JPS6041782B2 (en) | 1985-09-18 |
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