IE883591L - Data handling apparatus - Google Patents
Data handling apparatusInfo
- 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
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]
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)
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)
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 |
-
1988
- 1988-12-01 IE IE883591A patent/IE883591L/en unknown
- 1988-12-21 ZA ZA889532A patent/ZA889532B/en unknown
-
1989
- 1989-11-17 GB GB8925995A patent/GB2225690A/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
GB8925995D0 (en) | 1990-01-10 |
GB2225690A (en) | 1990-06-06 |
ZA889532B (en) | 1989-09-27 |
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