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JPS57206949A - Data processing device - Google Patents

Data processing device

Info

Publication number
JPS57206949A
JPS57206949A JP9180681A JP9180681A JPS57206949A JP S57206949 A JPS57206949 A JP S57206949A JP 9180681 A JP9180681 A JP 9180681A JP 9180681 A JP9180681 A JP 9180681A JP S57206949 A JPS57206949 A JP S57206949A
Authority
JP
Japan
Prior art keywords
data
processing unit
data processing
main memory
transferred
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.)
Pending
Application number
JP9180681A
Other languages
Japanese (ja)
Inventor
Katsuhiro Matsukawa
Kiyokazu Hanatani
Isao Yamazaki
Fumiaki Seto
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9180681A priority Critical patent/JPS57206949A/en
Publication of JPS57206949A publication Critical patent/JPS57206949A/en
Pending 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
    • G06F13/36—Handling requests for interconnection or transfer for access to common bus or bus system
    • G06F13/362—Handling requests for interconnection or transfer for access to common bus or bus system with centralised access control
    • G06F13/364—Handling requests for interconnection or transfer for access to common bus or bus system with centralised access control using independent requests or grants, e.g. using separated request and grant lines
    • 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

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)

Abstract

PURPOSE:To reduce the number of times of data transfer between a data processing device and a main memory by transferring the same data to other data processing units connected to a common bus simultaneously when the data is transferred from an aimed data processing unit to the main memory. CONSTITUTION:Data bus using request (DRQ) discriminating circuit 10 in a memory control unit 2 discriminates whether data bus is used (A) only between data processing units 4-6 and a main memory 3 or (B) between the data processing unit and the main memory 3 and between other data processing units on the basis of the previously set up information outputted from the processing unit 1. Data can be transferred by the two formats (A) and (B) and, in case of the format (B), the same data are transferred to other processing units simultaneously with the data transfer from an aimed processing unit to the main memory 3. When data processing unit processes a data by using the processed result of another processing unit, the number of times of data transfer is reduced and transfer efficiency is improved.
JP9180681A 1981-06-15 1981-06-15 Data processing device Pending JPS57206949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9180681A JPS57206949A (en) 1981-06-15 1981-06-15 Data processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9180681A JPS57206949A (en) 1981-06-15 1981-06-15 Data processing device

Publications (1)

Publication Number Publication Date
JPS57206949A true JPS57206949A (en) 1982-12-18

Family

ID=14036861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9180681A Pending JPS57206949A (en) 1981-06-15 1981-06-15 Data processing device

Country Status (1)

Country Link
JP (1) JPS57206949A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03129450A (en) * 1989-07-21 1991-06-03 Matsushita Electric Ind Co Ltd Method and device for data transfer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03129450A (en) * 1989-07-21 1991-06-03 Matsushita Electric Ind Co Ltd Method and device for data transfer

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