JPS6419437A - Bus synchronous collation system for microcomputer - Google Patents
Bus synchronous collation system for microcomputerInfo
- Publication number
- JPS6419437A JPS6419437A JP62174942A JP17494287A JPS6419437A JP S6419437 A JPS6419437 A JP S6419437A JP 62174942 A JP62174942 A JP 62174942A JP 17494287 A JP17494287 A JP 17494287A JP S6419437 A JPS6419437 A JP S6419437A
- Authority
- JP
- Japan
- Prior art keywords
- value
- counter
- microcomputers
- microcomputer
- collation
- 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 improve the system operating ratio while securing the fail-safe property of a microcomputer by periodically reading out the value of a counter by the microcomputer and judging the occurrence of disaccord of data to stop the collation output at the time of detecting that the value of the counter is different from an initially set value. CONSTITUTION:The value of a counter 4 is periodically compared with the initially set value by microcomputers 1 and 2 of respective systems, and collation signals indicating normal operations are outputted from microcomputers 1 and 2 if data completely coincide with each other and the value of the counter 4 is equal to the initial value, but collation signals are stopped if data do not coincide and the counter value is different from the initial value. The operation of the system is stopped unless microcomputers 1 and 2 of respective systems output collation signals together. Thus, the fail-safe property of microcomputers is secured and the system operating ratio is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62174942A JPS6419437A (en) | 1987-07-15 | 1987-07-15 | Bus synchronous collation system for microcomputer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62174942A JPS6419437A (en) | 1987-07-15 | 1987-07-15 | Bus synchronous collation system for microcomputer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6419437A true JPS6419437A (en) | 1989-01-23 |
Family
ID=15987425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62174942A Pending JPS6419437A (en) | 1987-07-15 | 1987-07-15 | Bus synchronous collation system for microcomputer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6419437A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5544347A (en) * | 1990-09-24 | 1996-08-06 | Emc Corporation | Data storage system controlled remote data mirroring with respectively maintained data indices |
-
1987
- 1987-07-15 JP JP62174942A patent/JPS6419437A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5544347A (en) * | 1990-09-24 | 1996-08-06 | Emc Corporation | Data storage system controlled remote data mirroring with respectively maintained data indices |
US6625705B2 (en) * | 1993-04-23 | 2003-09-23 | Emc Corporation | Remote data mirroring system having a service processor |
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