JPS6488768A - Bus monitoring device for multi-cpu system - Google Patents
Bus monitoring device for multi-cpu systemInfo
- Publication number
- JPS6488768A JPS6488768A JP62244108A JP24410887A JPS6488768A JP S6488768 A JPS6488768 A JP S6488768A JP 62244108 A JP62244108 A JP 62244108A JP 24410887 A JP24410887 A JP 24410887A JP S6488768 A JPS6488768 A JP S6488768A
- Authority
- JP
- Japan
- Prior art keywords
- cpu
- board
- system bus
- boards
- bus monitoring
- 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 ensure successive actions for normal CPU boards by adding a system bus monitoring means to a multi-CPU system to produce a resetting signal so that the use of a system bus is inhibited for the CPU board having abnormality in case this defective CPU board is occupying the system bus. CONSTITUTION:A latch port 11 is added to a system bus monitoring device 9 and at the same time, NAND gates 12-15 are added to the input signal lines 2a-5a led from the CPU boards 25 respectively. In case the device 9 has abnormality in one of those CPU boards, e.g., a CPU board 2, '1' is given to the port 11 as an access inhibiting signal to the board 2. Thus the input of an access request signal is avoided to the board 2 and therefore, the access request signals are supplied to other three CPU boards 3-5 only. Thus these three normal CPU boards can perform their actions. In such a way, the availability of a multi-CPU system is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62244108A JPS6488768A (en) | 1987-09-30 | 1987-09-30 | Bus monitoring device for multi-cpu system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62244108A JPS6488768A (en) | 1987-09-30 | 1987-09-30 | Bus monitoring device for multi-cpu system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6488768A true JPS6488768A (en) | 1989-04-03 |
Family
ID=17113874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62244108A Pending JPS6488768A (en) | 1987-09-30 | 1987-09-30 | Bus monitoring device for multi-cpu system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6488768A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08161279A (en) * | 1994-12-08 | 1996-06-21 | Nec Corp | Multiprocessor system |
JPH0944378A (en) * | 1995-07-28 | 1997-02-14 | Nec Corp | Bus fault detector |
-
1987
- 1987-09-30 JP JP62244108A patent/JPS6488768A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08161279A (en) * | 1994-12-08 | 1996-06-21 | Nec Corp | Multiprocessor system |
JPH0944378A (en) * | 1995-07-28 | 1997-02-14 | Nec Corp | Bus fault detector |
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