IE883591L - Data handling apparatus - Google Patents

Data handling apparatus

Info

Publication number
IE883591L
IE883591L IE883591A IE359188A IE883591L IE 883591 L IE883591 L IE 883591L IE 883591 A IE883591 A IE 883591A IE 359188 A IE359188 A IE 359188A IE 883591 L IE883591 L IE 883591L
Authority
IE
Ireland
Prior art keywords
host computer
network controller
terminal
line
terminals
Prior art date
Application number
IE883591A
Original Assignee
Blackbird Technology 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 Blackbird Technology Ltd filed Critical Blackbird Technology Ltd
Priority to IE883591A priority Critical patent/IE883591L/en
Priority to ZA889532A priority patent/ZA889532B/en
Priority to GB8925995A priority patent/GB2225690A/en
Publication of IE883591L publication Critical patent/IE883591L/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40169—Flexible bus arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer And Data Communications (AREA)

Abstract

Data handling apparatus comprises a host computer (2) which controls a network controller (3), and a network of terminals (T1) to (T12) under the control of the network controller (3). The network controller (3) transmits data from the terminals (T1) to (T12) to the host computer (2). The host computer (2) controls the polling sequence by which the network controller polls the terminals (T1) to (T12). On a terminal (T1) to (T12) going off-line, the host computer removes it from the polling sequence and stores the identity of the terminal for a predetermined time period. After the predetermined time period having timed out, the host computer (2) returns the off-line terminal into the polling sequence of the network controller (3). Should the off-line terminal be found still to be off-line it is removed for a greater predetermined time period. <IMAGE> [GB2225690A]
IE883591A 1988-12-01 1988-12-01 Data handling apparatus IE883591L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
IE883591A IE883591L (en) 1988-12-01 1988-12-01 Data handling apparatus
ZA889532A ZA889532B (en) 1988-12-01 1988-12-21 Data handling apparatus
GB8925995A GB2225690A (en) 1988-12-01 1989-11-17 Data handling apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE883591A IE883591L (en) 1988-12-01 1988-12-01 Data handling apparatus

Publications (1)

Publication Number Publication Date
IE883591L true IE883591L (en) 1990-06-01

Family

ID=11038873

Family Applications (1)

Application Number Title Priority Date Filing Date
IE883591A IE883591L (en) 1988-12-01 1988-12-01 Data handling apparatus

Country Status (3)

Country Link
GB (1) GB2225690A (en)
IE (1) IE883591L (en)
ZA (1) ZA889532B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139300A1 (en) * 1991-11-29 1993-06-03 Rheydt Kabelwerk Ag Network topology for bidirectional data transmission in passive network - has cable branch points at beginning and end of network dividing central device data lines into local device data lines
DE19722477C2 (en) * 1997-05-28 2002-04-04 Siemens Ag communication system
DE19722479B4 (en) * 1997-05-28 2005-02-17 Siemens Ag communication system
DE19722478C2 (en) * 1997-05-28 2002-05-02 Siemens Ag communication system
CA2354177A1 (en) 2001-07-26 2003-01-26 Waverider Communications Inc. Polling using multiple dynamically updated lists
US7484125B2 (en) 2003-07-07 2009-01-27 Hewlett-Packard Development Company, L.P. Method and apparatus for providing updated processor polling information

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665406A (en) * 1970-04-13 1972-05-23 Bunker Ramo Automatic polling systems
US4683531A (en) * 1984-07-02 1987-07-28 Ncr Corporation Polling method for data processing system
US4654656A (en) * 1984-09-17 1987-03-31 International Business Machines Corp. Off-line notification and communication network

Also Published As

Publication number Publication date
GB8925995D0 (en) 1990-01-10
GB2225690A (en) 1990-06-06
ZA889532B (en) 1989-09-27

Similar Documents

Publication Publication Date Title
EP0343630A3 (en) Terminal apparatus for resetting by remote control
CA2130690A1 (en) Card Issue System
MX9801199A (en) Data communication apparatus and method.
DE3573958D1 (en) Polling method for data processing system
CA2179095A1 (en) Modulator and demodulator (modem)
FR2641392B1 (en) TERMINAL DATA EQUIPMENT USING A HIERARCHISED PROTOCOL, AND TRANSMISSION CONTROL METHOD USING THE EQUIPMENT
AU587558B2 (en) System and method for removing volatile components from an aqueous medium
CA2255932A1 (en) Method and apparatus for controlling electrical devices in response to sensed conditions
YU231188A (en) Process and device for data processing system, which has connected relation between many cpu-s
AU1389388A (en) Apparatus and systems comprising a superconductive body, and method for producing such body
CA2054124A1 (en) Process for franking mail and a system for carrying out this process
EP0605091A3 (en) Method and apparatus for forming an operational configuration of an interface Board.
AU7589987A (en) Apparatus and method for forming an integral object from laminations
AU1674488A (en) Retroperfusion and retroinfusion control apparatus, system and method
EP0083002A3 (en) Interrupt system for peripheral controller
AR243397A1 (en) Process for stripping liquid systems and sparger system therefor
AU4325489A (en) Process and device for recognizing spark failures
CA2153538A1 (en) Apparatus and Method for Minimizing the Turn on Time for a Receiver Operating in a Discontinuous Receive Mode
AU4980790A (en) An apparatus for, and a method of, printing a pattern on a container component
IE883591L (en) Data handling apparatus
EP0199035A3 (en) Adaptive method for character data compression
AU6511290A (en) Method and electrodialyzer for removing salts from an electrolytic aqueous solution
WO1999045519A3 (en) Fleet management system and method
AU4171089A (en) Coil feeding system, method and apparatus
AU8836782A (en) Method and switching circuit for feeding a subscriber:s apparatus