JPS556621A - Bus switching control system - Google Patents

Bus switching control system

Info

Publication number
JPS556621A
JPS556621A JP7873378A JP7873378A JPS556621A JP S556621 A JPS556621 A JP S556621A JP 7873378 A JP7873378 A JP 7873378A JP 7873378 A JP7873378 A JP 7873378A JP S556621 A JPS556621 A JP S556621A
Authority
JP
Japan
Prior art keywords
transmission direction
buses
control
control system
switching control
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
JP7873378A
Other languages
Japanese (ja)
Other versions
JPS5743940B2 (en
Inventor
Hachiro Iida
Masato Maruyama
Takeshi Miyamoto
Mitsuyoshi Nagatani
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.)
Iwatsu Electric Co Ltd
NTT Inc
Original Assignee
Iwatsu Electric Co Ltd
Nippon Telegraph and Telephone Corp
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 Iwatsu Electric Co Ltd, Nippon Telegraph and Telephone Corp filed Critical Iwatsu Electric Co Ltd
Priority to JP7873378A priority Critical patent/JPS556621A/en
Publication of JPS556621A publication Critical patent/JPS556621A/en
Publication of JPS5743940B2 publication Critical patent/JPS5743940B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Small-Scale Networks (AREA)
  • Bus Control (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE: To make it possible to control the transmission direction between the lst and 2nd buses by switching, by controlling the transmission direction of a bilateral buffer according to the value of an address bit.
CONSTITUTION: Microprocessors 20 and 21 control data buses 22 and 23 respectively; processor 21 composed of a bipolar element operates faster than processor 20. Here, bilateral buffer 24 available for the control of the transmission direction is interposed between buses 22 and 23 to control the transmission direction of buffer 24, thereby controlling the transmission direction between buses 22 and 23 by switching.
COPYRIGHT: (C)1980,JPO&Japio
JP7873378A 1978-06-30 1978-06-30 Bus switching control system Granted JPS556621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7873378A JPS556621A (en) 1978-06-30 1978-06-30 Bus switching control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7873378A JPS556621A (en) 1978-06-30 1978-06-30 Bus switching control system

Publications (2)

Publication Number Publication Date
JPS556621A true JPS556621A (en) 1980-01-18
JPS5743940B2 JPS5743940B2 (en) 1982-09-18

Family

ID=13670078

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7873378A Granted JPS556621A (en) 1978-06-30 1978-06-30 Bus switching control system

Country Status (1)

Country Link
JP (1) JPS556621A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57171864A (en) * 1981-04-16 1982-10-22 Toshiba Corp Data communication system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5261444A (en) * 1975-11-17 1977-05-20 Yokogawa Hokushin Electric Corp Data bus system of information processing unit
JPS5387133A (en) * 1977-01-06 1978-08-01 Ibm Input*output interface connecting circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5261444A (en) * 1975-11-17 1977-05-20 Yokogawa Hokushin Electric Corp Data bus system of information processing unit
JPS5387133A (en) * 1977-01-06 1978-08-01 Ibm Input*output interface connecting circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57171864A (en) * 1981-04-16 1982-10-22 Toshiba Corp Data communication system

Also Published As

Publication number Publication date
JPS5743940B2 (en) 1982-09-18

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