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
Japan
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.)
Granted
Application number
JP7174380A
Other languages
Japanese (ja)
Other versions
JPS6332298B2 (en
Inventor
Kiyonari Muta
Isamu Saito
Takuya Kuroda
Tsunezo Sato
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 JP7174380A priority Critical patent/JPS56168458A/en
Publication of JPS56168458A publication Critical patent/JPS56168458A/en
Publication of JPS6332298B2 publication Critical patent/JPS6332298B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/22—Handling requests for interconnection or transfer for access to input/output bus using successive scanning, e.g. polling
    • G06F13/225—Handling 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 Terminal communication control system Granted JPS56168458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7174380A JPS56168458A (en) 1980-05-29 1980-05-29 Terminal communication control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7174380A JPS56168458A (en) 1980-05-29 1980-05-29 Terminal communication control system

Publications (2)

Publication Number Publication Date
JPS56168458A 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 Granted JPS56168458A (en) 1980-05-29 1980-05-29 Terminal communication control system

Country Status (1)

Country Link
JP (1) JPS56168458A (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
JPS6332298B2 (en) 1988-06-29

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