JPS6458037A - Channel command control system - Google Patents

Channel command control system

Info

Publication number
JPS6458037A
JPS6458037A JP21450987A JP21450987A JPS6458037A JP S6458037 A JPS6458037 A JP S6458037A JP 21450987 A JP21450987 A JP 21450987A JP 21450987 A JP21450987 A JP 21450987A JP S6458037 A JPS6458037 A JP S6458037A
Authority
JP
Japan
Prior art keywords
controller
ccw
command
input
output
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
JP21450987A
Other languages
Japanese (ja)
Inventor
Chieko Aoyanagi
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 JP21450987A priority Critical patent/JPS6458037A/en
Publication of JPS6458037A publication Critical patent/JPS6458037A/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
    • G06F13/10—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 ensure the effective use of a channel command CC word area by adding a CC word controller which deletes a chain via a channel command controller even though a command-chained channel command is issued from an input/output controller. CONSTITUTION:When an input/output control processing program 2 performs plural input/output operations to an input/output controller 4, the controller 4 sets a command-chained channel command word CCW at a CCW area 3 of a CCW controller 7. Then the command chain of the CCW is deleted out of the processing of a CCW control program 8. The program 8 produces an input/output start instruction to the controller 4. Thus the controller 4 is started to receive a CCW free from the command chain and performs a series of processes to the CCW. Then the controller 7 outputs a process end interruption to the program 2.
JP21450987A 1987-08-28 1987-08-28 Channel command control system Pending JPS6458037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21450987A JPS6458037A (en) 1987-08-28 1987-08-28 Channel command control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21450987A JPS6458037A (en) 1987-08-28 1987-08-28 Channel command control system

Publications (1)

Publication Number Publication Date
JPS6458037A true JPS6458037A (en) 1989-03-06

Family

ID=16656896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21450987A Pending JPS6458037A (en) 1987-08-28 1987-08-28 Channel command control system

Country Status (1)

Country Link
JP (1) JPS6458037A (en)

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