JPS55920A - Diagnostic system for input-output device - Google Patents

Diagnostic system for input-output device

Info

Publication number
JPS55920A
JPS55920A JP7316178A JP7316178A JPS55920A JP S55920 A JPS55920 A JP S55920A JP 7316178 A JP7316178 A JP 7316178A JP 7316178 A JP7316178 A JP 7316178A JP S55920 A JPS55920 A JP S55920A
Authority
JP
Japan
Prior art keywords
control part
fault
decision
write data
input
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
JP7316178A
Other languages
Japanese (ja)
Inventor
Takaharu Takai
Tomiyuki Fujimori
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 JP7316178A priority Critical patent/JPS55920A/en
Publication of JPS55920A publication Critical patent/JPS55920A/en
Pending legal-status Critical Current

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  • Test And Diagnosis Of Digital Computers (AREA)

Abstract

PURPOSE: To obtain a diagnostic system for input-output devices which can make a decision on whether a control part for I/Os or device part gets wrong, by providing a gate method to the control part.
CONSTITUTION: When a fault is supposed to occur inside of I/Oll, diagnostic mode assignment D is received from CPU. As a result, gate method 21 provided newly inside control part 12 operates to break write data bus 14. Then, control part 12 becomes capable of operating without reference to device part 11. Therefore, write data when the fault of device 11 is induced is outputted from write data generator 22 and applied to check part 23. If the data has an error itself here, it is decided that the fault of device 11 is in control part 12, thereby sending error signal E1. When the data has no error, a decision that it is in device part 13 is made and error signal E2 is sent. In this way, a decision on the fault point is made in a diagnostic mode and also in a write mode.
COPYRIGHT: (C)1980,JPO&Japio
JP7316178A 1978-06-19 1978-06-19 Diagnostic system for input-output device Pending JPS55920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7316178A JPS55920A (en) 1978-06-19 1978-06-19 Diagnostic system for input-output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7316178A JPS55920A (en) 1978-06-19 1978-06-19 Diagnostic system for input-output device

Publications (1)

Publication Number Publication Date
JPS55920A true JPS55920A (en) 1980-01-07

Family

ID=13510160

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7316178A Pending JPS55920A (en) 1978-06-19 1978-06-19 Diagnostic system for input-output device

Country Status (1)

Country Link
JP (1) JPS55920A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669838A (en) * 1984-12-28 1987-06-02 Infoquest Corporation Roll film document image storage and retrieval apparatus and system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5285436A (en) * 1976-01-09 1977-07-15 Nec Corp Data channel device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5285436A (en) * 1976-01-09 1977-07-15 Nec Corp Data channel device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669838A (en) * 1984-12-28 1987-06-02 Infoquest Corporation Roll film document image storage and retrieval apparatus and system

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