JPS5476002A - Transmission control system - Google Patents

Transmission control system

Info

Publication number
JPS5476002A
JPS5476002A JP14373277A JP14373277A JPS5476002A JP S5476002 A JPS5476002 A JP S5476002A JP 14373277 A JP14373277 A JP 14373277A JP 14373277 A JP14373277 A JP 14373277A JP S5476002 A JPS5476002 A JP S5476002A
Authority
JP
Japan
Prior art keywords
data transfer
polling
transmission source
terminals
general
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
JP14373277A
Other languages
Japanese (ja)
Inventor
Masato Soma
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 JP14373277A priority Critical patent/JPS5476002A/en
Publication of JPS5476002A publication Critical patent/JPS5476002A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To reduce the overhead of the polling and thus to increase the process capacity of the system by sending the presence or absence of all terminal data transfer requests back to the general polling transmission source by one general polling and performing the data transfer continuously with the terminal which has the data transfer request. CONSTITUTION:Flag resister R1 to show the absence or presence of the data transfer request for each of terminals 21, 22 ... 25 is provided at controller 1 which controls terminals 21, 22 ... 2n. Thus, the contents of register R1 is sent back to the general polling given from polling transmission source 3 to be memorized in flag register R2 provided at the transmission source. In this way, the data transfer is carried out continuously and in sequence between all terminals 21, 22 ... 25 which have the data transfer request and polling transmission source 3 and without repeating the general polling.
JP14373277A 1977-11-30 1977-11-30 Transmission control system Pending JPS5476002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14373277A JPS5476002A (en) 1977-11-30 1977-11-30 Transmission control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14373277A JPS5476002A (en) 1977-11-30 1977-11-30 Transmission control system

Publications (1)

Publication Number Publication Date
JPS5476002A true JPS5476002A (en) 1979-06-18

Family

ID=15345713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14373277A Pending JPS5476002A (en) 1977-11-30 1977-11-30 Transmission control system

Country Status (1)

Country Link
JP (1) JPS5476002A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS562763A (en) * 1979-06-20 1981-01-13 Toshiba Corp Data gathering system
JPS5711557A (en) * 1980-06-26 1982-01-21 Fujitsu Ltd Data transmission system
JPS58129624A (en) * 1982-01-29 1983-08-02 Casio Comput Co Ltd Data transferring system
JPS5985157A (en) * 1982-11-06 1984-05-17 Fujitsu Ltd Information processing system
JPS61224751A (en) * 1985-03-29 1986-10-06 Usac Electronics Ind Co Ltd Polling response control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS562763A (en) * 1979-06-20 1981-01-13 Toshiba Corp Data gathering system
JPS5711557A (en) * 1980-06-26 1982-01-21 Fujitsu Ltd Data transmission system
JPS58129624A (en) * 1982-01-29 1983-08-02 Casio Comput Co Ltd Data transferring system
JPS5985157A (en) * 1982-11-06 1984-05-17 Fujitsu Ltd Information processing system
JPS61224751A (en) * 1985-03-29 1986-10-06 Usac Electronics Ind Co Ltd Polling response control system

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