JPS57111642A - Loop detector - Google Patents

Loop detector

Info

Publication number
JPS57111642A
JPS57111642A JP55188933A JP18893380A JPS57111642A JP S57111642 A JPS57111642 A JP S57111642A JP 55188933 A JP55188933 A JP 55188933A JP 18893380 A JP18893380 A JP 18893380A JP S57111642 A JPS57111642 A JP S57111642A
Authority
JP
Japan
Prior art keywords
comparator
output
memory
counter
coincidence
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
JP55188933A
Other languages
Japanese (ja)
Inventor
Hisashi Kimura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55188933A priority Critical patent/JPS57111642A/en
Publication of JPS57111642A publication Critical patent/JPS57111642A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751—Error or fault detection not based on redundancy
    • G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
    • G06F11/076—Error or fault detection not based on redundancy by exceeding limits by exceeding a count or rate limit, e.g. word- or bit count limit

Abstract

PURPOSE:To capture a permanent loop surely when it generates in any part of programs and generate an interruption by providing a series of detecting means consisting of an address memory, a comparator, a loop counter, etc. CONSTITUTION:The respective outputs of an address register 16 accessing a program memory 14 are written into an address memory 32, and the read output of the memory 32 and the output of the register 16 are compared in a comparator 34. The read addresses of the memory 32 are controlled by a control circuit 36, and at every generation of the coincidence output by a comparator 38, it is counted with a loop counter 40, and when the count values attains a prescribed value, a permanent loop detection output is produced. Or further, a distance counter 42, is provided to count the non-coincidence outputs of the comparator 38, and is reset by the coincidence output. When the count value attains a prescribed value, the counter 40 is reset.
JP55188933A 1980-12-26 1980-12-26 Loop detector Pending JPS57111642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55188933A JPS57111642A (en) 1980-12-26 1980-12-26 Loop detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55188933A JPS57111642A (en) 1980-12-26 1980-12-26 Loop detector

Publications (1)

Publication Number Publication Date
JPS57111642A true JPS57111642A (en) 1982-07-12

Family

ID=16232429

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55188933A Pending JPS57111642A (en) 1980-12-26 1980-12-26 Loop detector

Country Status (1)

Country Link
JP (1) JPS57111642A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62106552A (en) * 1985-11-01 1987-05-18 Fujitsu Ltd Loop detector
EP0573651A1 (en) * 1991-12-26 1993-12-15 Dia Semicon Systems Incorporated Condition monitor method for computer system and power saving controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62106552A (en) * 1985-11-01 1987-05-18 Fujitsu Ltd Loop detector
EP0573651A1 (en) * 1991-12-26 1993-12-15 Dia Semicon Systems Incorporated Condition monitor method for computer system and power saving controller
EP0573651A4 (en) * 1991-12-26 1994-02-23 Dia Semicon Systems Incorporated

Similar Documents

Publication Publication Date Title
ES440887A1 (en) Access control unit
JPS57111642A (en) Loop detector
JPS5437432A (en) Error detector of memory device
JPS56126373A (en) Picture reading device
JPS57111641A (en) Single step single roop detector
JPS57137951A (en) Data processor
JPS5647299A (en) Trouble detecting device of a press
JPS54116969A (en) Time limit device
JPS5486244A (en) Information processor
ES8405174A1 (en) A timing control system in a data processor.
JPS5692655A (en) Detection system of program runaway
JPS57211653A (en) Loop detecting device
JPS5773678A (en) Detector for momentary power failure
JPS5395532A (en) Error correction system for read only memory unit
JPS57108937A (en) Trap system by instruction code
JPS5373041A (en) Detection device for fixed memory error
JPS5729960A (en) Testing system of digital audible signal tone generator
JPS56103743A (en) Microprogram controller
JPS55119080A (en) Tracker type signal processer
JPS5741709A (en) Operation monitor device
JPS5729160A (en) Information processor
JPS5783859A (en) Detecting system for runaway of programmable program
JPS56124959A (en) Check system of digital equipment
JPS55138666A (en) Ic testing apparatus
JPS5462798A (en) Centralized alarm and monitor device