JPS6419437A - Bus synchronous collation system for microcomputer - Google Patents

Bus synchronous collation system for microcomputer

Info

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
Application number
JP62174942A
Other languages
Japanese (ja)
Inventor
Tetsuo Takashige
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Railway Technical Research Institute
Original Assignee
Railway Technical Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Railway Technical Research Institute filed Critical Railway Technical Research Institute
Priority to JP62174942A priority Critical patent/JPS6419437A/en
Publication of JPS6419437A publication Critical patent/JPS6419437A/en
Pending legal-status Critical Current

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.
JP62174942A 1987-07-15 1987-07-15 Bus synchronous collation system for microcomputer Pending JPS6419437A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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