JPS5757332A - Input-output control system - Google Patents

Input-output control system

Info

Publication number
JPS5757332A
JPS5757332A JP13260580A JP13260580A JPS5757332A JP S5757332 A JPS5757332 A JP S5757332A JP 13260580 A JP13260580 A JP 13260580A JP 13260580 A JP13260580 A JP 13260580A JP S5757332 A JPS5757332 A JP S5757332A
Authority
JP
Japan
Prior art keywords
busy
start request
given
report
input
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
JP13260580A
Other languages
Japanese (ja)
Other versions
JPS6223904B2 (en
Inventor
Eiichi Uozumi
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP13260580A priority Critical patent/JPS5757332A/en
Publication of JPS5757332A publication Critical patent/JPS5757332A/en
Publication of JPS6223904B2 publication Critical patent/JPS6223904B2/ja
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
    • G06F13/10—Program control for peripheral devices
    • G06F13/12—Program control for peripheral devices using hardware independent of the central processor, e.g. channel or peripheral processor
    • G06F13/122—Program control for peripheral devices using hardware independent of the central processor, e.g. channel or peripheral processor where hardware performs an I/O function other than control of data transfer

Landscapes

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

Abstract

PURPOSE:To reduce the overhead for both software and hardware, by accepting a start request at a data channel (CH) to retain it there when the CH receiving a start request is busy or retaining a CH interruption. CONSTITUTION:A start reporting part 41 of data CH decides whether a transfer part 42 is busy or not when it receives a start request from a CPU1 and then checks a subchannel (SBCH) 44 corresponding to an I/O of a start request when it knows that the CH is busy. A BUSY report is given to the CPU1 if the I/O is busy. When the I/O is idle, no BUSY report is given. And the start request is retained. When the CH becomes available by the CH end report given from the I/O or the nipping of retaining of the CH interruption given from the CPU, the I/O is started as long as the next start is retained within the part 41. In such way, the overhead can be reduced for both software and hardware.
JP13260580A 1980-09-24 1980-09-24 Input-output control system Granted JPS5757332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13260580A JPS5757332A (en) 1980-09-24 1980-09-24 Input-output control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13260580A JPS5757332A (en) 1980-09-24 1980-09-24 Input-output control system

Publications (2)

Publication Number Publication Date
JPS5757332A true JPS5757332A (en) 1982-04-06
JPS6223904B2 JPS6223904B2 (en) 1987-05-26

Family

ID=15085236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13260580A Granted JPS5757332A (en) 1980-09-24 1980-09-24 Input-output control system

Country Status (1)

Country Link
JP (1) JPS5757332A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142765A (en) * 1983-12-29 1985-07-27 Nec Corp Command reception system of transfer device
JPS61182155A (en) * 1985-02-07 1986-08-14 Fujitsu Ltd Channel control system
JPH02228751A (en) * 1989-03-01 1990-09-11 Fujitsu Ltd Information processor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0289116U (en) * 1988-12-28 1990-07-16

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS519538A (en) * 1974-07-15 1976-01-26 Hitachi Ltd Maruchi akusesuyo nyushutsuryokukanrisochi
JPS5257743A (en) * 1975-11-07 1977-05-12 Hitachi Ltd Channel equipment
JPS532049A (en) * 1976-06-29 1978-01-10 Hitachi Ltd Input output processing device
JPS53145441A (en) * 1977-05-25 1978-12-18 Hitachi Ltd Restarting system for input/output device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS519538A (en) * 1974-07-15 1976-01-26 Hitachi Ltd Maruchi akusesuyo nyushutsuryokukanrisochi
JPS5257743A (en) * 1975-11-07 1977-05-12 Hitachi Ltd Channel equipment
JPS532049A (en) * 1976-06-29 1978-01-10 Hitachi Ltd Input output processing device
JPS53145441A (en) * 1977-05-25 1978-12-18 Hitachi Ltd Restarting system for input/output device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142765A (en) * 1983-12-29 1985-07-27 Nec Corp Command reception system of transfer device
JPS61182155A (en) * 1985-02-07 1986-08-14 Fujitsu Ltd Channel control system
JPH02228751A (en) * 1989-03-01 1990-09-11 Fujitsu Ltd Information processor

Also Published As

Publication number Publication date
JPS6223904B2 (en) 1987-05-26

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