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JPS54160147A - Communication control unit - Google Patents

Communication control unit

Info

Publication number
JPS54160147A
JPS54160147A JP6881478A JP6881478A JPS54160147A JP S54160147 A JPS54160147 A JP S54160147A JP 6881478 A JP6881478 A JP 6881478A JP 6881478 A JP6881478 A JP 6881478A JP S54160147 A JPS54160147 A JP S54160147A
Authority
JP
Japan
Prior art keywords
data
time
status
command
register
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
JP6881478A
Other languages
Japanese (ja)
Other versions
JPS6024977B2 (en
Inventor
Seiichiro Takita
Masato Soma
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP53068814A priority Critical patent/JPS6024977B2/en
Publication of JPS54160147A publication Critical patent/JPS54160147A/en
Publication of JPS6024977B2 publication Critical patent/JPS6024977B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Computer And Data Communications (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE: To avoid the long-term pending state of the PCI interruption by carrying out the command skip to give switching to the new buffer only when the data is supplied actually in case the command is finished after the data transfer.
CONSTITUTION: The READ command received at channel adaptor F is set to command register A. At this moment, time supervisory mechanism D starts supervisory for the time. In the next sequence, adaptor F is set with circuit scan mechanism G and draws out the data from data register B storing the data to send it to the channel. In case the time supervisory has time-over before end of the data transfer, mechanism D makes status control mechanism E set the status requesting the command retrial to status register C. In case no time-over is secured, the status under which the status modifier bit is turned on is set to register C to be then sent to the channel.
COPYRIGHT: (C)1979,JPO&Japio
JP53068814A 1978-06-09 1978-06-09 Communication control device Expired JPS6024977B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53068814A JPS6024977B2 (en) 1978-06-09 1978-06-09 Communication control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53068814A JPS6024977B2 (en) 1978-06-09 1978-06-09 Communication control device

Publications (2)

Publication Number Publication Date
JPS54160147A true JPS54160147A (en) 1979-12-18
JPS6024977B2 JPS6024977B2 (en) 1985-06-15

Family

ID=13384553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53068814A Expired JPS6024977B2 (en) 1978-06-09 1978-06-09 Communication control device

Country Status (1)

Country Link
JP (1) JPS6024977B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61264829A (en) * 1985-05-17 1986-11-22 Fujitsu Ltd Control system for interruption of network controller
JPS6231461A (en) * 1985-08-01 1987-02-10 Nec Corp Communication control system
JPS62130447A (en) * 1985-11-22 1987-06-12 Panafacom Ltd Communication data reception system by inter-character time supervision

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61264829A (en) * 1985-05-17 1986-11-22 Fujitsu Ltd Control system for interruption of network controller
JPS6231461A (en) * 1985-08-01 1987-02-10 Nec Corp Communication control system
JPH0548503B2 (en) * 1985-08-01 1993-07-21 Nippon Electric Co
JPS62130447A (en) * 1985-11-22 1987-06-12 Panafacom Ltd Communication data reception system by inter-character time supervision

Also Published As

Publication number Publication date
JPS6024977B2 (en) 1985-06-15

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