JPS54136144A - Shared input/output bus control unit - Google Patents

Shared input/output bus control unit

Info

Publication number
JPS54136144A
JPS54136144A JP4315878A JP4315878A JPS54136144A JP S54136144 A JPS54136144 A JP S54136144A JP 4315878 A JP4315878 A JP 4315878A JP 4315878 A JP4315878 A JP 4315878A JP S54136144 A JPS54136144 A JP S54136144A
Authority
JP
Japan
Prior art keywords
boat
processor
input
signals
output bus
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
JP4315878A
Other languages
Japanese (ja)
Other versions
JPS6023382B2 (en
Inventor
Takayuki Morioka
Takeshi Kato
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 JP53043158A priority Critical patent/JPS6023382B2/en
Publication of JPS54136144A publication Critical patent/JPS54136144A/en
Publication of JPS6023382B2 publication Critical patent/JPS6023382B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To ensure the monitor or the abnormal switching process for the processor in place of the normal processor by securing the function which monitors the process request given to the processor from the input/output device as well as the time required for the process of the processor.
CONSTITUTION: Boat 11c and 11d to be connected to input/output device 9i and different procesors are connected to shared input/output bus 7d. Shared input/output bus control unit 6d receives various kinds of request signals sent from device 9i as well as the data transfer signals from the processor at reception circuits 12W14, with time monitor circuits 15W17 provided at the rear step of device 9i. As the various kinds of signals are turned on and off with every data word, the fault is decided in case these signals are kept on for a fixed time. The output of circuits 15W17 reach boat 11c and 11d via boat selection setter 18 and boat selection signal sending circuit 19. In this contitution, in case the procesor connected with boat 11d, for example, becomes down, boat selection signal 20a is cut off. And with arrival of the connection command, selection signal 20b is transmitted to start the process through the normal processor.
COPYRIGHT: (C)1979,JPO&Japio
JP53043158A 1978-04-14 1978-04-14 Shared I/O bus controller Expired JPS6023382B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53043158A JPS6023382B2 (en) 1978-04-14 1978-04-14 Shared I/O bus controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53043158A JPS6023382B2 (en) 1978-04-14 1978-04-14 Shared I/O bus controller

Publications (2)

Publication Number Publication Date
JPS54136144A true JPS54136144A (en) 1979-10-23
JPS6023382B2 JPS6023382B2 (en) 1985-06-07

Family

ID=12656047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53043158A Expired JPS6023382B2 (en) 1978-04-14 1978-04-14 Shared I/O bus controller

Country Status (1)

Country Link
JP (1) JPS6023382B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5679345A (en) * 1979-11-30 1981-06-29 Hitachi Ltd Fault detection system of compound type arithmetic device
JPS60158360U (en) * 1984-03-29 1985-10-22 東芝ライテック株式会社 transmission device
JPS60249453A (en) * 1984-05-25 1985-12-10 Yokogawa Hokushin Electric Corp Data transmission system
JPS61173368A (en) * 1985-01-28 1986-08-05 Oki Electric Ind Co Ltd Access system for shared memory device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5679345A (en) * 1979-11-30 1981-06-29 Hitachi Ltd Fault detection system of compound type arithmetic device
JPS60158360U (en) * 1984-03-29 1985-10-22 東芝ライテック株式会社 transmission device
JPS60249453A (en) * 1984-05-25 1985-12-10 Yokogawa Hokushin Electric Corp Data transmission system
JPS61173368A (en) * 1985-01-28 1986-08-05 Oki Electric Ind Co Ltd Access system for shared memory device

Also Published As

Publication number Publication date
JPS6023382B2 (en) 1985-06-07

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