JPS57143658A - Microcomputer compounding system - Google Patents

Microcomputer compounding system

Info

Publication number
JPS57143658A
JPS57143658A JP56029674A JP2967481A JPS57143658A JP S57143658 A JPS57143658 A JP S57143658A JP 56029674 A JP56029674 A JP 56029674A JP 2967481 A JP2967481 A JP 2967481A JP S57143658 A JPS57143658 A JP S57143658A
Authority
JP
Japan
Prior art keywords
lines
request
acknowledge
shared memory
swtiching
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
JP56029674A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Horikoshi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56029674A priority Critical patent/JPS57143658A/en
Publication of JPS57143658A publication Critical patent/JPS57143658A/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
    • G06F13/16—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)
  • Microcomputers (AREA)
  • Multi Processors (AREA)

Abstract

PURPOSE:To improve the processing capability easily and economically, by providing request and acknowledge lines for a microcomputer and providing a circuit for acknowledge control and swtiching of address and input/output data lines. CONSTITUTION:Microcomputers 1 to be compounded are provided with request lines 8 for request to a shared memory and acknowledge lines 9 corresponding to lines 8, and a request controller 6a for the control of request-acknowledge and swtiching circuits 6b and 6c for swtiching of address lines and input/output data lines are provided between these lines 8 and 9 and a shared memory 13, and microcomputers 1 monopolize the shared memory 13. Consequently, the contention for the shared memory between computers 1 is avoided.
JP56029674A 1981-03-02 1981-03-02 Microcomputer compounding system Pending JPS57143658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56029674A JPS57143658A (en) 1981-03-02 1981-03-02 Microcomputer compounding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56029674A JPS57143658A (en) 1981-03-02 1981-03-02 Microcomputer compounding system

Publications (1)

Publication Number Publication Date
JPS57143658A true JPS57143658A (en) 1982-09-04

Family

ID=12282652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56029674A Pending JPS57143658A (en) 1981-03-02 1981-03-02 Microcomputer compounding system

Country Status (1)

Country Link
JP (1) JPS57143658A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50109643A (en) * 1974-02-04 1975-08-28
JPS53114641A (en) * 1977-03-16 1978-10-06 Ibm Multiple processing system
JPS55995A (en) * 1978-06-16 1980-01-07 Ibm Device for making processor to use memory
JPS567161A (en) * 1979-06-28 1981-01-24 Hitachi Ltd Memory interface device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50109643A (en) * 1974-02-04 1975-08-28
JPS53114641A (en) * 1977-03-16 1978-10-06 Ibm Multiple processing system
JPS55995A (en) * 1978-06-16 1980-01-07 Ibm Device for making processor to use memory
JPS567161A (en) * 1979-06-28 1981-01-24 Hitachi Ltd Memory interface device

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