JPS55112621A - Clock unit for information processing system - Google Patents
Clock unit for information processing systemInfo
- Publication number
- JPS55112621A JPS55112621A JP1834179A JP1834179A JPS55112621A JP S55112621 A JPS55112621 A JP S55112621A JP 1834179 A JP1834179 A JP 1834179A JP 1834179 A JP1834179 A JP 1834179A JP S55112621 A JPS55112621 A JP S55112621A
- Authority
- JP
- Japan
- Prior art keywords
- clock
- timer
- unit
- circuit
- csc3
- 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
Abstract
PURPOSE: To enable the clock operation by the second unit even if the first unit is in failure, by incorporating the real time timer to each unit, in the information processing system consisting of the first unit and a plurality of the second units.
CONSTITUTION: In the system consisting of the centralized monitor unit CSC3 and a plurality of CPU4, each unit incorporates the real timers 2, 1 respectively. The timer 2 counts the real time standard value of the timer 1 via the clock set instruction line 18 and the timer value supply line 15. If the CSC3 is normal, the signal of the clock effective display line 17 is 1, the selection circuit 11 selects the clock of the clock generation circuit 5, and if the CSC3 is in failure, the signal on the line 17 is 0 with the failure detection circuit 6, and the circuit 11 selects the clock of the clock generating circuit 12. The clock count clock from the circuit 11 is fed to the timer 1 via the timer control circuit 10.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1834179A JPS55112621A (en) | 1979-02-21 | 1979-02-21 | Clock unit for information processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1834179A JPS55112621A (en) | 1979-02-21 | 1979-02-21 | Clock unit for information processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55112621A true JPS55112621A (en) | 1980-08-30 |
Family
ID=11968945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1834179A Pending JPS55112621A (en) | 1979-02-21 | 1979-02-21 | Clock unit for information processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55112621A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991016671A1 (en) * | 1990-04-13 | 1991-10-31 | Kabushiki Kaisha Toshiba | Clock device |
JPH0826366A (en) * | 1994-07-18 | 1996-01-30 | Toshiba Emi Ltd | Disk housing case |
-
1979
- 1979-02-21 JP JP1834179A patent/JPS55112621A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991016671A1 (en) * | 1990-04-13 | 1991-10-31 | Kabushiki Kaisha Toshiba | Clock device |
JPH0826366A (en) * | 1994-07-18 | 1996-01-30 | Toshiba Emi Ltd | Disk housing case |
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