JPS57141738A - Data transfer device - Google Patents

Data transfer device

Info

Publication number
JPS57141738A
JPS57141738A JP2751381A JP2751381A JPS57141738A JP S57141738 A JPS57141738 A JP S57141738A JP 2751381 A JP2751381 A JP 2751381A JP 2751381 A JP2751381 A JP 2751381A JP S57141738 A JPS57141738 A JP S57141738A
Authority
JP
Japan
Prior art keywords
interruption
data chain
channel
processing
section
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
JP2751381A
Other languages
Japanese (ja)
Other versions
JPS6048784B2 (en
Inventor
Yoshihisa Shibata
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 JP2751381A priority Critical patent/JPS6048784B2/en
Publication of JPS57141738A publication Critical patent/JPS57141738A/en
Publication of JPS6048784B2 publication Critical patent/JPS6048784B2/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
    • G06F13/10—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

Abstract

PURPOSE:To prevent the reduction in processing ability of a channel controlling section, by constituting the device so that an interruption is generated from a channel only when no data chain processing can be done at the interruption from a buffer controlling section. CONSTITUTION:During the seccession of data transfer, when a channel command word CWC with small byte count is kept with a data chain, a channel controlling section 1 sets a data chain mask FF13 via a bus 103 and stops the processing of data chain. Further, when the present byte count register 10 goes to 0 and the next byter count register 11 is used, a signal is transmitted from a byte count controoling section 14 to a bus 109, and an AND condition with a value of the FF13 given via a bus 108 is taken and a data chain mask interruption is generated to the control section 1 from an interruption generating circuit 16. The control section 1 receiving the interruption restarts the data chain processing which is stopped and transmits the information relating to the next CCW to a buffer control section 2 and a channel 4.
JP2751381A 1981-02-26 1981-02-26 data transfer device Expired JPS6048784B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2751381A JPS6048784B2 (en) 1981-02-26 1981-02-26 data transfer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2751381A JPS6048784B2 (en) 1981-02-26 1981-02-26 data transfer device

Publications (2)

Publication Number Publication Date
JPS57141738A true JPS57141738A (en) 1982-09-02
JPS6048784B2 JPS6048784B2 (en) 1985-10-29

Family

ID=12223205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2751381A Expired JPS6048784B2 (en) 1981-02-26 1981-02-26 data transfer device

Country Status (1)

Country Link
JP (1) JPS6048784B2 (en)

Also Published As

Publication number Publication date
JPS6048784B2 (en) 1985-10-29

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