JPS57168325A - Processing system of transferring preferential data - Google Patents

Processing system of transferring preferential data

Info

Publication number
JPS57168325A
JPS57168325A JP5348481A JP5348481A JPS57168325A JP S57168325 A JPS57168325 A JP S57168325A JP 5348481 A JP5348481 A JP 5348481A JP 5348481 A JP5348481 A JP 5348481A JP S57168325 A JPS57168325 A JP S57168325A
Authority
JP
Japan
Prior art keywords
request
low priority
data
priority
signal
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
JP5348481A
Other languages
Japanese (ja)
Inventor
Yuichi Kato
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5348481A priority Critical patent/JPS57168325A/en
Publication of JPS57168325A publication Critical patent/JPS57168325A/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
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Bus Control (AREA)

Abstract

PURPOSE:To prevent a processing of a low priority data from being kept queuing for a long time, by storing the data transfer requests given from plural channels based on the order of priority and carrying out the processing to the request for a low priority data after a certain period of time elapses. CONSTITUTION:The data transfer request signal given from an input/output channel CH of a computer is received by a priority control part 2. When a transfer request is produced at CH3-CH10 having high priority while the data of CH1 is transferred and held at a high priority request storing part 7 in the state of the custody, the data transfer request of the CH2 having low priority is stored in a low priority request storing part 10. When the circuit 10 turns a signal 11 showing the holding state of the request into a significant one, a low priority request forcible process control part 13 works to turn a low priority request processing state signal 15 significant in the lapse of time T. After the time T, a high priority request processing state signal 14 is not significant any more, and the signal 15 becomes significant to actuate a low priority request starting part 19. Thus the request is processed for the transfer of data of the CH2 which is held at the part 13.
JP5348481A 1981-04-09 1981-04-09 Processing system of transferring preferential data Pending JPS57168325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5348481A JPS57168325A (en) 1981-04-09 1981-04-09 Processing system of transferring preferential data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5348481A JPS57168325A (en) 1981-04-09 1981-04-09 Processing system of transferring preferential data

Publications (1)

Publication Number Publication Date
JPS57168325A true JPS57168325A (en) 1982-10-16

Family

ID=12944113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5348481A Pending JPS57168325A (en) 1981-04-09 1981-04-09 Processing system of transferring preferential data

Country Status (1)

Country Link
JP (1) JPS57168325A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179550A2 (en) * 1984-10-26 1986-04-30 Trw Inc. Controlled star network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179550A2 (en) * 1984-10-26 1986-04-30 Trw Inc. Controlled star network

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