JPS5483305A - Communication control equipment with continuative polling system - Google Patents

Communication control equipment with continuative polling system

Info

Publication number
JPS5483305A
JPS5483305A JP15053777A JP15053777A JPS5483305A JP S5483305 A JPS5483305 A JP S5483305A JP 15053777 A JP15053777 A JP 15053777A JP 15053777 A JP15053777 A JP 15053777A JP S5483305 A JPS5483305 A JP S5483305A
Authority
JP
Japan
Prior art keywords
polling
continuative
timer
communication control
control equipment
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
JP15053777A
Other languages
Japanese (ja)
Inventor
Katsuaki Takabori
Isao Nakada
Takeaki Matsuoka
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 JP15053777A priority Critical patent/JPS5483305A/en
Publication of JPS5483305A publication Critical patent/JPS5483305A/en
Pending 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

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)

Abstract

PURPOSE:To make possible the execution of continuative polling in every stated period even if a terminal has once become a no responce condition by adding a continuative polling function to an automatic polling function. CONSTITUTION:A polling list is received 2 from CPU and the control byte in it is discriminated by discrimination circuit 3, whether the bite is a one for continuative polling or not. In case of the byte for continuative polling, the condition of timer 6 which decides the interval of continuative polling is discriminated by timer discrimination circuit 4; when the timer is stopped, it is started and, in case of the timer in operation, an automatic polling command is finished 7. When the time set point of timer 6 is over, the polling sequences on and after the control byte are transmitted and, when the time set point is not over, the polling lists on and after the control byte are skipped.
JP15053777A 1977-12-16 1977-12-16 Communication control equipment with continuative polling system Pending JPS5483305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15053777A JPS5483305A (en) 1977-12-16 1977-12-16 Communication control equipment with continuative polling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15053777A JPS5483305A (en) 1977-12-16 1977-12-16 Communication control equipment with continuative polling system

Publications (1)

Publication Number Publication Date
JPS5483305A true JPS5483305A (en) 1979-07-03

Family

ID=15499028

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15053777A Pending JPS5483305A (en) 1977-12-16 1977-12-16 Communication control equipment with continuative polling system

Country Status (1)

Country Link
JP (1) JPS5483305A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5665300A (en) * 1979-10-31 1981-06-02 Matsushita Electric Ind Co Ltd Obstacleedata collecting system
JPS5684056A (en) * 1979-12-12 1981-07-09 Mitsubishi Electric Corp Data transmitting method
JPS6435426U (en) * 1987-08-28 1989-03-03

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5665300A (en) * 1979-10-31 1981-06-02 Matsushita Electric Ind Co Ltd Obstacleedata collecting system
JPS5684056A (en) * 1979-12-12 1981-07-09 Mitsubishi Electric Corp Data transmitting method
JPS6435426U (en) * 1987-08-28 1989-03-03

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