FR2406250A1 - Microprocessor memory direct accessing system - has buffer interface controlling data addressing and transfer between memory, drive circuit and logic circuitry - Google Patents

Microprocessor memory direct accessing system - has buffer interface controlling data addressing and transfer between memory, drive circuit and logic circuitry

Info

Publication number
FR2406250A1
FR2406250A1 FR7731140A FR7731140A FR2406250A1 FR 2406250 A1 FR2406250 A1 FR 2406250A1 FR 7731140 A FR7731140 A FR 7731140A FR 7731140 A FR7731140 A FR 7731140A FR 2406250 A1 FR2406250 A1 FR 2406250A1
Authority
FR
France
Prior art keywords
memory
drive circuit
buffer interface
logic circuitry
transfer
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
FR7731140A
Other languages
French (fr)
Other versions
FR2406250B1 (en
Inventor
Gerard Chauvel
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.)
Texas Instruments France SAS
Original Assignee
Texas Instruments France SAS
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 Texas Instruments France SAS filed Critical Texas Instruments France SAS
Priority to FR7731140A priority Critical patent/FR2406250A1/en
Publication of FR2406250A1 publication Critical patent/FR2406250A1/en
Application granted granted Critical
Publication of FR2406250B1 publication Critical patent/FR2406250B1/fr
Granted 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
    • G06F13/16—Handling requests for interconnection or transfer for access to memory bus
    • G06F13/18—Handling requests for interconnection or transfer for access to memory bus based on priority control
    • 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
    • G06F13/28—Handling requests for interconnection or transfer for access to input/output bus using burst mode transfer, e.g. direct memory access DMA, cycle steal
    • G06F13/287—Multiplexed DMA

Abstract

The system comprises a buffer interface (5) which during a period of accessing of the drive circuit from a memory supplies data addresses contained in the memory. It also maintains the continuous circulation of corresponding data between the drive circuit and the memory. This also operates during the rest of the drive circuit accessing period and puts into memory the required data till the termination of the accessing period. It can also operate to break the data circulation towards the memory and the corresp. logic circuitry to control the buffer interface inhibition.
FR7731140A 1977-10-17 1977-10-17 Microprocessor memory direct accessing system - has buffer interface controlling data addressing and transfer between memory, drive circuit and logic circuitry Granted FR2406250A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7731140A FR2406250A1 (en) 1977-10-17 1977-10-17 Microprocessor memory direct accessing system - has buffer interface controlling data addressing and transfer between memory, drive circuit and logic circuitry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7731140A FR2406250A1 (en) 1977-10-17 1977-10-17 Microprocessor memory direct accessing system - has buffer interface controlling data addressing and transfer between memory, drive circuit and logic circuitry

Publications (2)

Publication Number Publication Date
FR2406250A1 true FR2406250A1 (en) 1979-05-11
FR2406250B1 FR2406250B1 (en) 1983-04-08

Family

ID=9196576

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7731140A Granted FR2406250A1 (en) 1977-10-17 1977-10-17 Microprocessor memory direct accessing system - has buffer interface controlling data addressing and transfer between memory, drive circuit and logic circuitry

Country Status (1)

Country Link
FR (1) FR2406250A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461300A1 (en) * 1979-07-10 1981-01-30 Lucas Industries Ltd Multiple computers with access to common memory - have interface unit based on address and data multiplexer
FR2465269A1 (en) * 1979-09-12 1981-03-20 Cii Honeywell Bull ASYNCHRONOUS DEMAND SELECTOR IN AN INFORMATION PROCESSING SYSTEM
FR2505584A1 (en) * 1981-05-07 1982-11-12 Burr Brown Res Corp CIRCUIT FOR REPORTING DATA BETWEEN TWO SYSTEMS
FR2513469A1 (en) * 1981-09-24 1983-03-25 Thomson Csf Mat Tel Rapid signal selecting circuit - uses input monostable multivibrators followed by coder-selector circuit and signal validating circuit
FR2541796A1 (en) * 1983-02-25 1984-08-31 Texas Instruments France DEVICE FOR DISTRIBUTING THE ACCESS TIME OF A MEMORY ON SEVERAL USERS
EP0243113A2 (en) * 1986-04-23 1987-10-28 Hitachi, Ltd. Data processor
EP0055168B1 (en) * 1980-12-12 1988-03-02 TEXAS INSTRUMENTS FRANCE Société dite: Method and apparatus for displaying messages containing pages on a raster-scanned display system, e.g. a c.r.t. screen
EP0055167B1 (en) * 1980-12-12 1988-06-01 TEXAS INSTRUMENTS FRANCE Société dite: Method and apparatus for displaying messages on a raster-scanned display system, e.g. a crt screen, using a segmented memory

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461300A1 (en) * 1979-07-10 1981-01-30 Lucas Industries Ltd Multiple computers with access to common memory - have interface unit based on address and data multiplexer
FR2465269A1 (en) * 1979-09-12 1981-03-20 Cii Honeywell Bull ASYNCHRONOUS DEMAND SELECTOR IN AN INFORMATION PROCESSING SYSTEM
EP0025731A1 (en) * 1979-09-12 1981-03-25 COMPAGNIE INTERNATIONALE POUR L'INFORMATIQUE CII - HONEYWELL BULL (dite CII-HB) Selecting circuit for asynchronous requests in an information processing system
EP0055168B1 (en) * 1980-12-12 1988-03-02 TEXAS INSTRUMENTS FRANCE Société dite: Method and apparatus for displaying messages containing pages on a raster-scanned display system, e.g. a c.r.t. screen
EP0055167B1 (en) * 1980-12-12 1988-06-01 TEXAS INSTRUMENTS FRANCE Société dite: Method and apparatus for displaying messages on a raster-scanned display system, e.g. a crt screen, using a segmented memory
FR2505584A1 (en) * 1981-05-07 1982-11-12 Burr Brown Res Corp CIRCUIT FOR REPORTING DATA BETWEEN TWO SYSTEMS
FR2513469A1 (en) * 1981-09-24 1983-03-25 Thomson Csf Mat Tel Rapid signal selecting circuit - uses input monostable multivibrators followed by coder-selector circuit and signal validating circuit
FR2541796A1 (en) * 1983-02-25 1984-08-31 Texas Instruments France DEVICE FOR DISTRIBUTING THE ACCESS TIME OF A MEMORY ON SEVERAL USERS
EP0120745A1 (en) * 1983-02-25 1984-10-03 TEXAS INSTRUMENTS FRANCE Société dite: Apparatus permitting memory access timesharing by a plurality of users
EP0243113A2 (en) * 1986-04-23 1987-10-28 Hitachi, Ltd. Data processor
EP0243113A3 (en) * 1986-04-23 1989-11-02 Hitachi, Ltd. Data processor

Also Published As

Publication number Publication date
FR2406250B1 (en) 1983-04-08

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