JPS556639A - Re-try system of channel - Google Patents

Re-try system of channel

Info

Publication number
JPS556639A
JPS556639A JP7914178A JP7914178A JPS556639A JP S556639 A JPS556639 A JP S556639A JP 7914178 A JP7914178 A JP 7914178A JP 7914178 A JP7914178 A JP 7914178A JP S556639 A JPS556639 A JP S556639A
Authority
JP
Japan
Prior art keywords
control part
channel
try
reset
ioc
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
JP7914178A
Other languages
Japanese (ja)
Inventor
Toshio Shimada
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7914178A priority Critical patent/JPS556639A/en
Publication of JPS556639A publication Critical patent/JPS556639A/en
Pending legal-status Critical Current

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  • Retry When Errors Occur (AREA)

Abstract

PURPOSE: To reduce the overhead time to CPU by making a channel itself judge whether a re-try is possible or not and then execute it when an error occurs between the channel and an I/0 controller or when information on the occurrence of abnormality is sent from the I/O side.
CONSTITUTION: On the basis of the content of command register 8, IOC control part 9 performs the input-output operations with the I/O control part. Detection part 7 makes a comparison between an instruction sent from the channel and a response made by the IO control part for error detection. In addition, error detection in the channel is also possible; when a machine address sent by the channel disagrees with an address from IOC as to a start sequence, it is judged that an error has occurred and 0 control part 9 informing re-try control part 5 and reset control part 6 of it sends a reset signal to IOC by reset command 6. Control part 6 informs control part 5 of the reset end, set initial instruction address register 4 to register 3 when the re-try is possible, and reads the original instruction at the point in time of the start sequence start, thereby starting input-ouput operation again.
COPYRIGHT: (C)1980,JPO&Japio
JP7914178A 1978-06-29 1978-06-29 Re-try system of channel Pending JPS556639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7914178A JPS556639A (en) 1978-06-29 1978-06-29 Re-try system of channel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7914178A JPS556639A (en) 1978-06-29 1978-06-29 Re-try system of channel

Publications (1)

Publication Number Publication Date
JPS556639A true JPS556639A (en) 1980-01-18

Family

ID=13681677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7914178A Pending JPS556639A (en) 1978-06-29 1978-06-29 Re-try system of channel

Country Status (1)

Country Link
JP (1) JPS556639A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5914031A (en) * 1982-07-15 1984-01-24 Hitachi Ltd Input/output control method
JPS60120444A (en) * 1983-12-02 1985-06-27 Mitsubishi Electric Corp Cpu controller
JPS60189048A (en) * 1984-03-07 1985-09-26 Fujitsu Ltd Error recovering method
JPS62174861A (en) * 1986-01-28 1987-07-31 Nec Corp Dispersion control system for multiprocessor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5914031A (en) * 1982-07-15 1984-01-24 Hitachi Ltd Input/output control method
JPS60120444A (en) * 1983-12-02 1985-06-27 Mitsubishi Electric Corp Cpu controller
JPS60189048A (en) * 1984-03-07 1985-09-26 Fujitsu Ltd Error recovering method
JPS62174861A (en) * 1986-01-28 1987-07-31 Nec Corp Dispersion control system for multiprocessor

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