JPS57206971A - Detector of program runaway - Google Patents

Detector of program runaway

Info

Publication number
JPS57206971A
JPS57206971A JP56090961A JP9096181A JPS57206971A JP S57206971 A JPS57206971 A JP S57206971A JP 56090961 A JP56090961 A JP 56090961A JP 9096181 A JP9096181 A JP 9096181A JP S57206971 A JPS57206971 A JP S57206971A
Authority
JP
Japan
Prior art keywords
operation code
program
counter
runaway
latched
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.)
Granted
Application number
JP56090961A
Other languages
Japanese (ja)
Other versions
JPS6326900B2 (en
Inventor
Akira Tsunoda
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56090961A priority Critical patent/JPS57206971A/en
Publication of JPS57206971A publication Critical patent/JPS57206971A/en
Publication of JPS6326900B2 publication Critical patent/JPS6326900B2/ja
Granted 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
    • G06F11/0763—Error or fault detection not based on redundancy by bit configuration check, e.g. of formats or tags

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To detect the runaway of a program in a quick and assured way, by checking the operation code during execution of the program with use of a storing means which stores the information meaning a fault. CONSTITUTION:A timing signal is delivered from an NAND circuit NA1 to a latch circuit 3 in the fetching cycle of the operation code, and the operation code is latched. This operation code is used for an address of a storage device 4, and the device 4 delivers the executing cycle data stored in accordance with the operation code to a counter 5. A load pulse is applied to the counter 5 from a 1-shot multivibrator 7, and the executing cycle data is preset to the counter 5. Then a fault signal E is delivered from the device 4 in case when a code other than the operation code is latched to the circuit 3 in the timing at which the operation code should arrive after a program had a runaway.
JP56090961A 1981-06-15 1981-06-15 Detector of program runaway Granted JPS57206971A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56090961A JPS57206971A (en) 1981-06-15 1981-06-15 Detector of program runaway

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56090961A JPS57206971A (en) 1981-06-15 1981-06-15 Detector of program runaway

Publications (2)

Publication Number Publication Date
JPS57206971A true JPS57206971A (en) 1982-12-18
JPS6326900B2 JPS6326900B2 (en) 1988-06-01

Family

ID=14013086

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56090961A Granted JPS57206971A (en) 1981-06-15 1981-06-15 Detector of program runaway

Country Status (1)

Country Link
JP (1) JPS57206971A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207935A (en) * 1984-03-31 1985-10-19 Toshiba Corp Detecting system of illegal instruction
JPS61134846A (en) * 1984-12-04 1986-06-21 Omron Tateisi Electronics Co Electronic computer system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207935A (en) * 1984-03-31 1985-10-19 Toshiba Corp Detecting system of illegal instruction
JPS61134846A (en) * 1984-12-04 1986-06-21 Omron Tateisi Electronics Co Electronic computer system

Also Published As

Publication number Publication date
JPS6326900B2 (en) 1988-06-01

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