JPS57121742A - Electronic apparatus - Google Patents

Electronic apparatus

Info

Publication number
JPS57121742A
JPS57121742A JP56006444A JP644481A JPS57121742A JP S57121742 A JPS57121742 A JP S57121742A JP 56006444 A JP56006444 A JP 56006444A JP 644481 A JP644481 A JP 644481A JP S57121742 A JPS57121742 A JP S57121742A
Authority
JP
Japan
Prior art keywords
input
electronic apparatus
microprocessor
output device
switch
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
JP56006444A
Other languages
Japanese (ja)
Inventor
Minoru Machida
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56006444A priority Critical patent/JPS57121742A/en
Publication of JPS57121742A publication Critical patent/JPS57121742A/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
    • G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)

Abstract

PURPOSE:To execute a diagnosis by a changeover switch without exerting influence on an input/output device, by providing a fault diagnostic program on a part of a control program, in an electronic apparatus provided with a microprocessor, a memory and an input/output interface. CONSTITUTION:A state of a swtich 17 is read by a microprocessor 1, and when it is set to the ground side, a control program 2 is called, the whole electronic apparatus is operated by a regular working mode, an input/output interface 4 also detects that the switch 17 is set to the ground side, supplies the telephone to an input/output device such as a keyboard 8, etc. together with an external storage controller 7, and the operation is executed under the control of the control program 2. When a printed circuit board 16 is inserted into a connector 15, the switch 17 is set to the side of +5V, and when the microprocessor 1 detects it, a diagnostic program 3 is called. At the same time, both the interface 4 and the controller 7 cut off the electric power supply to the input/output device, etc., and the diagnostic program 3 tests each part of the electronic apparatus.
JP56006444A 1981-01-21 1981-01-21 Electronic apparatus Pending JPS57121742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56006444A JPS57121742A (en) 1981-01-21 1981-01-21 Electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56006444A JPS57121742A (en) 1981-01-21 1981-01-21 Electronic apparatus

Publications (1)

Publication Number Publication Date
JPS57121742A true JPS57121742A (en) 1982-07-29

Family

ID=11638572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56006444A Pending JPS57121742A (en) 1981-01-21 1981-01-21 Electronic apparatus

Country Status (1)

Country Link
JP (1) JPS57121742A (en)

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