JPS56148796A - Computer application device - Google Patents

Computer application device

Info

Publication number
JPS56148796A
JPS56148796A JP5045680A JP5045680A JPS56148796A JP S56148796 A JPS56148796 A JP S56148796A JP 5045680 A JP5045680 A JP 5045680A JP 5045680 A JP5045680 A JP 5045680A JP S56148796 A JPS56148796 A JP S56148796A
Authority
JP
Japan
Prior art keywords
power
application device
locked
processor
computer application
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
JP5045680A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Hiragoori
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 JP5045680A priority Critical patent/JPS56148796A/en
Publication of JPS56148796A publication Critical patent/JPS56148796A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

PURPOSE:To improve the reliability of a small-sized computer application device by preventing its malfunction, by discriminating the absence of stored information through comparing the contents of RAM locked when electric power is cut off and check information in ROM after the power source is put to work. CONSTITUTION:Processor 7 controls equipment 9 to be controlled via RAM6, IO8, etc., according to the program of ROM11. If the power is cut off owing to a power failure, etc., power source detecting circuit 4 detects that to interrupt processor 7. In RAM6 backed up by auxiliary battery 5, the current state stands by and is locked according to a program for the break of power supply from ROM11. The locked information is compared with data in check information storage ROM10 by being unlocked by circuit 4 when the power source is put to work; when the both coincide mutually, the decision that there is no absent stored information is made to restart the processing of processor 7 and when not an alarm is generated. Thus, the malfunction of the miniature computer application device is prevented to improve the reliability.
JP5045680A 1980-04-18 1980-04-18 Computer application device Pending JPS56148796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5045680A JPS56148796A (en) 1980-04-18 1980-04-18 Computer application device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5045680A JPS56148796A (en) 1980-04-18 1980-04-18 Computer application device

Publications (1)

Publication Number Publication Date
JPS56148796A true JPS56148796A (en) 1981-11-18

Family

ID=12859364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5045680A Pending JPS56148796A (en) 1980-04-18 1980-04-18 Computer application device

Country Status (1)

Country Link
JP (1) JPS56148796A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891599A (en) * 1981-11-27 1983-05-31 Fujitsu Ltd Storage controlling system
EP0338455A2 (en) * 1988-04-16 1989-10-25 Sharp Kabushiki Kaisha Elektronische Registrierkasse mit Speicherdefekterkennung
JPH0793066A (en) * 1994-02-25 1995-04-07 Ricoh Co Ltd Power source monitor device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891599A (en) * 1981-11-27 1983-05-31 Fujitsu Ltd Storage controlling system
EP0338455A2 (en) * 1988-04-16 1989-10-25 Sharp Kabushiki Kaisha Elektronische Registrierkasse mit Speicherdefekterkennung
JPH0793066A (en) * 1994-02-25 1995-04-07 Ricoh Co Ltd Power source monitor device

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