JPS54118747A - Interruption priority control system - Google Patents
Interruption priority control systemInfo
- Publication number
- JPS54118747A JPS54118747A JP2640478A JP2640478A JPS54118747A JP S54118747 A JPS54118747 A JP S54118747A JP 2640478 A JP2640478 A JP 2640478A JP 2640478 A JP2640478 A JP 2640478A JP S54118747 A JPS54118747 A JP S54118747A
- Authority
- JP
- Japan
- Prior art keywords
- control unit
- logic
- priority
- unit
- line
- 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)
Abstract
PURPOSE: To enable the main control unit to give the equal and uniform interruption process service to each secondary control unit by varying the priority in sequence for each secondary control unit.
CONSTITUTION: Priority controlling FF14a, 14b and 14n are provided to secondary control unit 12a, 12b and 12n respectively, and these units are connected in series to form a ring counter. For instance, in case priority controlling data line 19a features logic 1, the output of logic sum gate 17a becomes logic 1 with logic product gate 7a opened. Under these conditions, unit 12a is in the highest interruption sequence. Then with transmission of one clock pulse onto line 21 from main control unit 11, the logic 1 signal on line 19a is read into FF14b and then delivered on line 19b. Thus, unit 12b features the highest priority. As a result, the highest priority shifts to unit 12b, 12i, 12n and 12a in that order with every transmission of one clock pulse.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2640478A JPS6016659B2 (en) | 1978-03-08 | 1978-03-08 | Interrupt priority control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2640478A JPS6016659B2 (en) | 1978-03-08 | 1978-03-08 | Interrupt priority control method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54118747A true JPS54118747A (en) | 1979-09-14 |
JPS6016659B2 JPS6016659B2 (en) | 1985-04-26 |
Family
ID=12192607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2640478A Expired JPS6016659B2 (en) | 1978-03-08 | 1978-03-08 | Interrupt priority control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6016659B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60180050U (en) * | 1985-04-18 | 1985-11-29 | カシオ計算機株式会社 | Common bus line occupancy control device |
US5149941A (en) * | 1987-06-16 | 1992-09-22 | Canon Kabushiki Kaisha | Image fixing apparatus with movable sheet member and detectors |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01297361A (en) * | 1989-02-20 | 1989-11-30 | Tokico Ltd | Charge of brake liquid in brake device |
-
1978
- 1978-03-08 JP JP2640478A patent/JPS6016659B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60180050U (en) * | 1985-04-18 | 1985-11-29 | カシオ計算機株式会社 | Common bus line occupancy control device |
US5149941A (en) * | 1987-06-16 | 1992-09-22 | Canon Kabushiki Kaisha | Image fixing apparatus with movable sheet member and detectors |
Also Published As
Publication number | Publication date |
---|---|
JPS6016659B2 (en) | 1985-04-26 |
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