JPS56168458A - Terminal communication control system - Google Patents

Terminal communication control system

Info

Publication number
JPS56168458A
JPS56168458A JP7174380A JP7174380A JPS56168458A JP S56168458 A JPS56168458 A JP S56168458A JP 7174380 A JP7174380 A JP 7174380A JP 7174380 A JP7174380 A JP 7174380A JP S56168458 A JPS56168458 A JP S56168458A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
polling
terminal
program
request
sequence
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
JP7174380A
Other versions
JPS6332298B2 (en )
Inventor
Takuya Kuroda
Kiyonari Muta
Isamu Saito
Tsunezo Sato
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

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14Handling requests for interconnection or transfer
    • G06F13/20Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/22Handling requests for interconnection or transfer for access to input/output bus using successive scanning, e.g. polling
    • G06F13/225Handling requests for interconnection or transfer for access to input/output bus using successive scanning, e.g. polling with priority control

Abstract

PURPOSE:To reduce the waiting time for polling, by giving a dynamic change to the sequence of polling by a request from the program side. CONSTITUTION:When a polling priority service is requested to a certain terminal from the program of a terminal control device, the polling to the terminal is inserted into a certain space under an ordinary cyclic polling to increase the polling frequency of the terminal. When a data output is requested to a certain terminal from the program of the terminal control device, this request is registered to a priority service flag register 4. Thus the cyclic polling is once discontinued to start an output sequence to the terminal. In such a way, the polling sequence can be changed in a dynamic way by a request from the program side.
JP7174380A 1980-05-29 1980-05-29 Expired JPS6332298B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7174380A JPS6332298B2 (en) 1980-05-29 1980-05-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7174380A JPS6332298B2 (en) 1980-05-29 1980-05-29

Publications (2)

Publication Number Publication Date
JPS56168458A true true JPS56168458A (en) 1981-12-24
JPS6332298B2 JPS6332298B2 (en) 1988-06-29

Family

ID=13469304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7174380A Expired JPS6332298B2 (en) 1980-05-29 1980-05-29

Country Status (1)

Country Link
JP (1) JPS6332298B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63268060A (en) * 1987-04-27 1988-11-04 Ricoh Co Ltd Serial communication system
JPS63312742A (en) * 1987-06-16 1988-12-21 Fujitsu Ltd Polling control system
JPS6450195A (en) * 1987-08-20 1989-02-27 Nittan Co Ltd Fire alarm system
JPH03139037A (en) * 1989-10-24 1991-06-13 Nissan Motor Co Ltd On-vehicle communication equipment
US5132680A (en) * 1988-12-09 1992-07-21 Fujitsu Limited Polling communication system with priority control

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944607A (en) * 1972-08-31 1974-04-26
JPS5368527A (en) * 1976-12-01 1978-06-19 Toshiba Corp Information transmitter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944607A (en) * 1972-08-31 1974-04-26
JPS5368527A (en) * 1976-12-01 1978-06-19 Toshiba Corp Information transmitter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63268060A (en) * 1987-04-27 1988-11-04 Ricoh Co Ltd Serial communication system
JPS63312742A (en) * 1987-06-16 1988-12-21 Fujitsu Ltd Polling control system
JPS6450195A (en) * 1987-08-20 1989-02-27 Nittan Co Ltd Fire alarm system
US5132680A (en) * 1988-12-09 1992-07-21 Fujitsu Limited Polling communication system with priority control
JPH03139037A (en) * 1989-10-24 1991-06-13 Nissan Motor Co Ltd On-vehicle communication equipment
JPH0777376B2 (en) * 1989-10-24 1995-08-16 日産自動車株式会社 Vehicle communication device

Also Published As

Publication number Publication date Type
JPS6332298B2 (en) 1988-06-29 grant

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