JPS57106926A - Program stole detecting system - Google Patents

Program stole detecting system

Info

Publication number
JPS57106926A
JPS57106926A JP55183522A JP18352280A JPS57106926A JP S57106926 A JPS57106926 A JP S57106926A JP 55183522 A JP55183522 A JP 55183522A JP 18352280 A JP18352280 A JP 18352280A JP S57106926 A JPS57106926 A JP S57106926A
Authority
JP
Japan
Prior art keywords
time
program
counter
cpu1
stole
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
JP55183522A
Other languages
Japanese (ja)
Inventor
Fumiyoshi Himeno
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP55183522A priority Critical patent/JPS57106926A/en
Publication of JPS57106926A publication Critical patent/JPS57106926A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/48—Program initiating; Program switching, e.g. by interrupt
    • G06F9/4806—Task transfer initiation or dispatching
    • G06F9/4812—Task transfer initiation or dispatching by interrupt, e.g. masked
    • G06F9/4825—Interrupt from clock, e.g. time of day

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To detect a program stole at low cost by resetting a time measuring instrument by the program of a controller at intervals within prescribed time, and by sending an interruption signal to the controller when the instrument is not reset for longer than the prescribed time. CONSTITUTION:According to a program stored in a memory part 4, a CPU1 controls various input and output equipments, and sets the time, obtained by adding something to the longest time among the execution times of tasks, to a time counter 3 as a count value, starting time counting operation. The counter 3 counts a fundamental clock from a clock generator 5 and when the execution of each tank is completed during said period, the CPU1 sends a resetting indication to the counter 3. Each time the resetting indication is sent, the counter 3 restarts counting from its count initial value and when its reaches the set count value, a count end signal is sent to an interruption controlling circuit 2, which sends an interruption signal to the CPU1. Consequently, the CPU1 discriminates a program stole and the program being executed is interrupted and a program stored at and after interruption-specified addresses is executed.
JP55183522A 1980-12-24 1980-12-24 Program stole detecting system Pending JPS57106926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55183522A JPS57106926A (en) 1980-12-24 1980-12-24 Program stole detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55183522A JPS57106926A (en) 1980-12-24 1980-12-24 Program stole detecting system

Publications (1)

Publication Number Publication Date
JPS57106926A true JPS57106926A (en) 1982-07-03

Family

ID=16137314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55183522A Pending JPS57106926A (en) 1980-12-24 1980-12-24 Program stole detecting system

Country Status (1)

Country Link
JP (1) JPS57106926A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61177276A (en) * 1985-01-31 1986-08-08 レックスマーク・インターナショナル・インコーポレーテッド Ribbon carrying and lifting device
US4635187A (en) * 1983-12-19 1987-01-06 At&T Bell Laboratories Control for a multiprocessing system program process
JPS63191246A (en) * 1986-09-02 1988-08-08 Nippon Telegr & Teleph Corp <Ntt> Processing progress control system
JP2022093876A (en) * 2020-12-14 2022-06-24 富士電機株式会社 Control device and maintenance support device therefor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55110350A (en) * 1979-02-16 1980-08-25 Hitachi Ltd Microprocessor
JPS55140953A (en) * 1979-04-19 1980-11-04 Casio Comput Co Ltd Abnormal operation detecting system for computer system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55110350A (en) * 1979-02-16 1980-08-25 Hitachi Ltd Microprocessor
JPS55140953A (en) * 1979-04-19 1980-11-04 Casio Comput Co Ltd Abnormal operation detecting system for computer system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635187A (en) * 1983-12-19 1987-01-06 At&T Bell Laboratories Control for a multiprocessing system program process
JPS61177276A (en) * 1985-01-31 1986-08-08 レックスマーク・インターナショナル・インコーポレーテッド Ribbon carrying and lifting device
JPS63191246A (en) * 1986-09-02 1988-08-08 Nippon Telegr & Teleph Corp <Ntt> Processing progress control system
JP2022093876A (en) * 2020-12-14 2022-06-24 富士電機株式会社 Control device and maintenance support device therefor

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