JPS5741755A - Shared memory controller - Google Patents

Shared memory controller

Info

Publication number
JPS5741755A
JPS5741755A JP11753080A JP11753080A JPS5741755A JP S5741755 A JPS5741755 A JP S5741755A JP 11753080 A JP11753080 A JP 11753080A JP 11753080 A JP11753080 A JP 11753080A JP S5741755 A JPS5741755 A JP S5741755A
Authority
JP
Japan
Prior art keywords
shared memory
processor
processors
priority
given
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
JP11753080A
Other languages
Japanese (ja)
Other versions
JPS5836381B2 (en
Inventor
Kunio Nakaya
Kazuo Mikami
Hiroshi Yokoyama
Teruhiko Tsuzuki
Koji Kobayashi
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP11753080A priority Critical patent/JPS5836381B2/en
Publication of JPS5741755A publication Critical patent/JPS5741755A/en
Publication of JPS5836381B2 publication Critical patent/JPS5836381B2/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
    • G06F13/16—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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Software Systems (AREA)
  • Multi Processors (AREA)

Abstract

PURPOSE:To increase the working efficiency of a processor, by making other processors wait temporarily only in the case of the competition caused by the requests simultaneously given from plural processors. CONSTITUTION:A circuit, which controls the connection of bus between the processors and a shared memory with the shared memory request signal given from each processor, consists of flip-flops (FF) 11a-11d that decide the priority in case the shared mamory request signals are given simultaneously from plural processors plus an RSFF20 that holds the result of decision of the priority. Based on the output of the RSFF20, a signal to connect the priority processor to the shared memory plus a signal to make the processor having other requests wait are delivered through logical circuits 14a-14d.
JP11753080A 1980-08-25 1980-08-25 shared memory controller Expired JPS5836381B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11753080A JPS5836381B2 (en) 1980-08-25 1980-08-25 shared memory controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11753080A JPS5836381B2 (en) 1980-08-25 1980-08-25 shared memory controller

Publications (2)

Publication Number Publication Date
JPS5741755A true JPS5741755A (en) 1982-03-09
JPS5836381B2 JPS5836381B2 (en) 1983-08-09

Family

ID=14714063

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11753080A Expired JPS5836381B2 (en) 1980-08-25 1980-08-25 shared memory controller

Country Status (1)

Country Link
JP (1) JPS5836381B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58165029A (en) * 1982-03-25 1983-09-30 Showa Electric Wire & Cable Co Ltd Detector for leakage of water
JPS6015763A (en) * 1983-07-05 1985-01-26 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Interface controller
JPS60221864A (en) * 1984-04-18 1985-11-06 Matsushita Electric Ind Co Ltd Control method of common memory
JPS6134693A (en) * 1984-07-27 1986-02-18 ニツタン株式会社 Fire alarm
JPS621057A (en) * 1984-12-07 1987-01-07 Nec Corp Transfer controller
JPS63214866A (en) * 1987-03-04 1988-09-07 Nec Corp Common bus control circuit
JPH01234963A (en) * 1988-03-15 1989-09-20 Koyo Electron Ind Co Ltd Data processor
JPH01239664A (en) * 1988-03-22 1989-09-25 Nec Corp Common memory arbitration device
JPH02247760A (en) * 1989-03-20 1990-10-03 Mitsubishi Electric Corp Input signal arbitrator

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58165029A (en) * 1982-03-25 1983-09-30 Showa Electric Wire & Cable Co Ltd Detector for leakage of water
JPS6015763A (en) * 1983-07-05 1985-01-26 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Interface controller
JPS60221864A (en) * 1984-04-18 1985-11-06 Matsushita Electric Ind Co Ltd Control method of common memory
JPS6134693A (en) * 1984-07-27 1986-02-18 ニツタン株式会社 Fire alarm
JPH0370278B2 (en) * 1984-07-27 1991-11-07 Nittan Co Ltd
JPS621057A (en) * 1984-12-07 1987-01-07 Nec Corp Transfer controller
JPS63214866A (en) * 1987-03-04 1988-09-07 Nec Corp Common bus control circuit
JPH01234963A (en) * 1988-03-15 1989-09-20 Koyo Electron Ind Co Ltd Data processor
JPH01239664A (en) * 1988-03-22 1989-09-25 Nec Corp Common memory arbitration device
JPH02247760A (en) * 1989-03-20 1990-10-03 Mitsubishi Electric Corp Input signal arbitrator

Also Published As

Publication number Publication date
JPS5836381B2 (en) 1983-08-09

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