GB1400803A - Digital data transmission systems - Google Patents

Digital data transmission systems

Info

Publication number
GB1400803A
GB1400803A GB5474072A GB5474072A GB1400803A GB 1400803 A GB1400803 A GB 1400803A GB 5474072 A GB5474072 A GB 5474072A GB 5474072 A GB5474072 A GB 5474072A GB 1400803 A GB1400803 A GB 1400803A
Authority
GB
United Kingdom
Prior art keywords
store
line
data
buffer
control unit
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.)
Expired
Application number
GB5474072A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1400803A publication Critical patent/GB1400803A/en
Expired 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
    • 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
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/382—Information transfer, e.g. on bus using universal interface adapter
    • G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Communication Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Computer And Data Communications (AREA)

Abstract

1400803 Digital transmission; time division multiplexing INTERNATIONAL BUSINESS MACHINES CORP 27 Nov 1972 [10 Dec 1971] 54740/72 Heading H4P A system sequentially transferring data between a central processing unit CPU and a plurality of transmission lines comprises a buffer store arranged to store individual line control words controlling transfer of data which is transferred to a local store in time sequence, and a control unit connected to local store to determine the functional mode of each line. To change a control word, a request signal is applied to the buffer store which is turn applies the word to the control unit modifying, if necessary, an existing line control word, which when next transferred to the buffer, controls data transfer between the relevant line and buffer store. The control unit controls data transmission in accordance with a plurality of micro-programmes which include one for controlling request queue data and for updating line control words in accordance with the queue sequence.
GB5474072A 1971-12-10 1972-11-27 Digital data transmission systems Expired GB1400803A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15862/71A SE352755B (en) 1971-12-10 1971-12-10

Publications (1)

Publication Number Publication Date
GB1400803A true GB1400803A (en) 1975-07-23

Family

ID=20301344

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5474072A Expired GB1400803A (en) 1971-12-10 1972-11-27 Digital data transmission systems

Country Status (6)

Country Link
JP (1) JPS5123850B2 (en)
DE (1) DE2252282C3 (en)
FR (1) FR2162371B1 (en)
GB (1) GB1400803A (en)
IT (1) IT969987B (en)
SE (1) SE352755B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328543A (en) 1980-03-25 1982-05-04 Ibm Corporation Control architecture for a communications controller

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2260140B1 (en) * 1974-02-01 1977-09-16 Honeywell Bull Soc Ind
JPS5386131A (en) * 1977-01-07 1978-07-29 Omron Tateisi Electronics Co Communication control unit of microprogram system
US4261033A (en) * 1977-01-19 1981-04-07 Honeywell Information Systems Inc. Communications processor employing line-dedicated memory tables for supervising data transfers
US4188665A (en) * 1977-11-29 1980-02-12 International Business Machines Corporation Programmable communications subsystem
US4156796A (en) * 1977-11-29 1979-05-29 International Business Machines Corporation Programmable data processing communications multiplexer
DE3164641D1 (en) * 1980-02-29 1984-08-16 Ibm Time division multiple access satellite communications controller
EP0048781B1 (en) * 1980-09-26 1985-03-27 International Business Machines Corporation Communication line adapter for a communication controller
EP0077863B1 (en) * 1981-10-28 1986-09-17 International Business Machines Corporation Scanning device for communication lines, adapted for a communication controller

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341818A (en) * 1964-06-30 1967-09-12 Ibm Plural line scanner
FR1523294A (en) * 1966-03-18 1968-05-03 Rca Corp Device for controlling information exchanges between a computer and a plurality of communication lines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328543A (en) 1980-03-25 1982-05-04 Ibm Corporation Control architecture for a communications controller

Also Published As

Publication number Publication date
JPS5123850B2 (en) 1976-07-20
SE352755B (en) 1973-01-08
FR2162371A1 (en) 1973-07-20
DE2252282B2 (en) 1974-06-27
JPS4866751A (en) 1973-09-12
IT969987B (en) 1974-04-10
DE2252282C3 (en) 1975-02-27
DE2252282A1 (en) 1973-06-20
FR2162371B1 (en) 1977-04-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee