JPS5552130A - Information processing unit - Google Patents

Information processing unit

Info

Publication number
JPS5552130A
JPS5552130A JP12476578A JP12476578A JPS5552130A JP S5552130 A JPS5552130 A JP S5552130A JP 12476578 A JP12476578 A JP 12476578A JP 12476578 A JP12476578 A JP 12476578A JP S5552130 A JPS5552130 A JP S5552130A
Authority
JP
Japan
Prior art keywords
bus
route
control
processing unit
mode
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
JP12476578A
Other languages
Japanese (ja)
Other versions
JPS628832B2 (en
Inventor
Takashi Yamazaki
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 JP12476578A priority Critical patent/JPS5552130A/en
Publication of JPS5552130A publication Critical patent/JPS5552130A/en
Publication of JPS628832B2 publication Critical patent/JPS628832B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Hardware Redundancy (AREA)
  • Bus Control (AREA)

Abstract

PURPOSE: To reduce the burden in the bus control of the processing unit, by providing the mode selection means with duplicated bus and performing bus selection of the connection bus with the polarity of bus mode and route FF.
CONSTITUTION: The buses 41 and 42 provide the control lines 41b, 42b in parallel with the data lines 41a and 42. When the output of the route FF 51 is "1" and the mode control line 41b is "1" and 42b is "0", the cable driver 71 and the cable receiver 61 are made effective, and the processor 21 is enabled for transfer via the bus 41. When the bus 41 is failure, the bus slection is made by the replacement of the signal on the control lines 41a and 42b by the control unit 11. In this case, since the route FF 51 is not concerted, the burden of the data processor 21 is reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP12476578A 1978-10-11 1978-10-11 Information processing unit Granted JPS5552130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12476578A JPS5552130A (en) 1978-10-11 1978-10-11 Information processing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12476578A JPS5552130A (en) 1978-10-11 1978-10-11 Information processing unit

Publications (2)

Publication Number Publication Date
JPS5552130A true JPS5552130A (en) 1980-04-16
JPS628832B2 JPS628832B2 (en) 1987-02-25

Family

ID=14893550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12476578A Granted JPS5552130A (en) 1978-10-11 1978-10-11 Information processing unit

Country Status (1)

Country Link
JP (1) JPS5552130A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941031A (en) * 1982-05-07 1984-03-07 デイジタル・イクイプメント・コ−ポレ−シヨン Dural path bus construction for mutual connection of computer
JPS6075957A (en) * 1983-09-30 1985-04-30 Fujitsu Ltd Selection control system of bus group
JPS6282452A (en) * 1985-10-07 1987-04-15 Nec Corp Data transfer device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114843A (en) * 1973-02-28 1974-11-01
JPS5393741A (en) * 1977-01-26 1978-08-17 Hokushin Electric Works Duplex data transfer system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114843A (en) * 1973-02-28 1974-11-01
JPS5393741A (en) * 1977-01-26 1978-08-17 Hokushin Electric Works Duplex data transfer system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941031A (en) * 1982-05-07 1984-03-07 デイジタル・イクイプメント・コ−ポレ−シヨン Dural path bus construction for mutual connection of computer
JPS6075957A (en) * 1983-09-30 1985-04-30 Fujitsu Ltd Selection control system of bus group
JPH059820B2 (en) * 1983-09-30 1993-02-08 Fujitsu Kk
JPS6282452A (en) * 1985-10-07 1987-04-15 Nec Corp Data transfer device
JPH0555904B2 (en) * 1985-10-07 1993-08-18 Nippon Electric Co

Also Published As

Publication number Publication date
JPS628832B2 (en) 1987-02-25

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