GB2007890A - A data processing system incorporating a bus - Google Patents

A data processing system incorporating a bus

Info

Publication number
GB2007890A
GB2007890A GB7841840A GB7841840A GB2007890A GB 2007890 A GB2007890 A GB 2007890A GB 7841840 A GB7841840 A GB 7841840A GB 7841840 A GB7841840 A GB 7841840A GB 2007890 A GB2007890 A GB 2007890A
Authority
GB
United Kingdom
Prior art keywords
data
interconnection
command
control
processing system
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.)
Granted
Application number
GB7841840A
Other versions
GB2007890B (en
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.)
Digital Equipment Corp
Original Assignee
Digital Equipment 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 Digital Equipment Corp filed Critical Digital Equipment Corp
Publication of GB2007890A publication Critical patent/GB2007890A/en
Application granted granted Critical
Publication of GB2007890B publication Critical patent/GB2007890B/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
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
    • G06F13/4208—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus
    • G06F13/4217—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus with synchronous protocol
    • 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
    • G06F13/36—Handling requests for interconnection or transfer for access to common bus or bus system
    • G06F13/368—Handling requests for interconnection or transfer for access to common bus or bus system with decentralised access control
    • G06F13/374—Handling requests for interconnection or transfer for access to common bus or bus system with decentralised access control using a self-select method with individual priority code comparator

Landscapes

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

Abstract

A digital data processing system includes an interconnection connected to the various elements each called a nexus, that constitute the system. For one element 32A to communicate with another element 32B, the one element, as a commanding nexus, seeks control of the interconnection and then transmits a command and address of a storage location in the other element when it receives control of the interconnection; the other element sends to the one element a confirmation signal in response to receipt of the command and address. Control is then relinquished unless the one element is to send data to the other element whereupon the data is sent immediately. If data is to be retrieved, the other element retrieves the data, requests control of the interconnection and, when it receives control transmits the data onto the interconnection with an identification of the one element which was included in the command transmitted by the one element and has been temporarily stored in the second element. The one element then retrieves the data from the interconnection when it recognizes its own identification. If the other element is a memory element, it also contains a storage file for storing commands and data if it already is operating in response to another element command. <IMAGE>
GB7841840A 1977-10-25 1978-10-25 Bus for a data processing system with overlapped sequences Expired GB2007890B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84541577A 1977-10-25 1977-10-25

Publications (2)

Publication Number Publication Date
GB2007890A true GB2007890A (en) 1979-05-23
GB2007890B GB2007890B (en) 1982-07-14

Family

ID=25295188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7841840A Expired GB2007890B (en) 1977-10-25 1978-10-25 Bus for a data processing system with overlapped sequences

Country Status (8)

Country Link
JP (1) JPS5484939A (en)
AU (1) AU520317B2 (en)
CA (1) CA1117664A (en)
DE (1) DE2846487A1 (en)
ES (1) ES474428A1 (en)
FR (1) FR2407523B1 (en)
GB (1) GB2007890B (en)
IT (1) IT1192335B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4607328A (en) * 1981-08-24 1986-08-19 Sony Corporation Data transfer apparatus for a microcomputer system
GB2273376A (en) * 1992-12-11 1994-06-15 Sony Corp Method and apparatus for arbitrating data requests and responses thereto as separate bus transations.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381542A (en) * 1980-10-20 1983-04-26 Digital Equipment Corporation System for interrupt arbitration
US4683530A (en) * 1984-04-10 1987-07-28 Telemecanique Electrique Serial information transfer protocol
US4827409A (en) * 1986-07-24 1989-05-02 Digital Equipment Corporation High speed interconnect unit for digital data processing system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614741A (en) * 1970-03-23 1971-10-19 Digital Equipment Corp Data processing system with instruction addresses identifying one of a plurality of registers including the program counter
US3614740A (en) * 1970-03-23 1971-10-19 Digital Equipment Corp Data processing system with circuits for transferring between operating routines, interruption routines and subroutines
US3815099A (en) * 1970-04-01 1974-06-04 Digital Equipment Corp Data processing system
US3710324A (en) * 1970-04-01 1973-01-09 Digital Equipment Corp Data processing system
DE2259223A1 (en) * 1972-12-04 1974-06-27 Licentia Gmbh CIRCUIT ARRANGEMENT TO CONNECT A MORE NUMBER OF BINARY INFORMATION SUBMITTING DEVICES THAN RECORDING DEVICES
US3916108A (en) * 1973-11-09 1975-10-28 Multiplex Communicat Inc Tdm communication system with centralized time slot address distribution
US3999163A (en) * 1974-01-10 1976-12-21 Digital Equipment Corporation Secondary storage facility for data processing systems
SU1274634A3 (en) * 1975-06-30 1986-11-30 Ханивелл Информейшн Системз Инк (Фирма) Device for priority connection of information source to common main line
US3997896A (en) * 1975-06-30 1976-12-14 Honeywell Information Systems, Inc. Data processing system providing split bus cycle operation
US3983540A (en) * 1975-09-08 1976-09-28 Honeywell Inc. Rapid bus priority resolution

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4607328A (en) * 1981-08-24 1986-08-19 Sony Corporation Data transfer apparatus for a microcomputer system
AT389951B (en) * 1981-08-24 1990-02-26 Sony Corp DATA TRANSFER DEVICE
GB2273376A (en) * 1992-12-11 1994-06-15 Sony Corp Method and apparatus for arbitrating data requests and responses thereto as separate bus transations.
US5608879A (en) * 1992-12-11 1997-03-04 Sony Corporation Method and apparatus for arbitrating data requests and responses thereto as separate bus transactions
GB2273376B (en) * 1992-12-11 1997-03-12 Sony Corp Data processing

Also Published As

Publication number Publication date
AU4103778A (en) 1980-05-08
FR2407523A1 (en) 1979-05-25
GB2007890B (en) 1982-07-14
CA1117664A (en) 1982-02-02
ES474428A1 (en) 1979-04-16
AU520317B2 (en) 1982-01-28
JPS5484939A (en) 1979-07-06
FR2407523B1 (en) 1988-05-13
IT7869443A0 (en) 1978-10-24
DE2846487A1 (en) 1979-04-26
JPS616424B2 (en) 1986-02-26
IT1192335B (en) 1988-03-31

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19981024

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)