JPS57735A - Path controlling system for request interruption of input and outut bus device - Google Patents

Path controlling system for request interruption of input and outut bus device

Info

Publication number
JPS57735A
JPS57735A JP7433980A JP7433980A JPS57735A JP S57735 A JPS57735 A JP S57735A JP 7433980 A JP7433980 A JP 7433980A JP 7433980 A JP7433980 A JP 7433980A JP S57735 A JPS57735 A JP S57735A
Authority
JP
Japan
Prior art keywords
interruption
numbers
storing means
request
permitted
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
JP7433980A
Other languages
Japanese (ja)
Inventor
Ryoichi Takamatsu
Hiroaki Nakanishi
Masakazu Okada
Takayuki Morioka
Hideyuki Hara
Toshihisa Oka
Hirokazu Kasashima
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 JP7433980A priority Critical patent/JPS57735A/en
Priority to GB8116665A priority patent/GB2077468B/en
Priority to DE19813122076 priority patent/DE3122076A1/en
Priority to US06/270,549 priority patent/US4468733A/en
Publication of JPS57735A publication Critical patent/JPS57735A/en
Pending legal-status Critical Current

Links

Landscapes

  • Multi Processors (AREA)
  • Bus Control (AREA)

Abstract

PURPOSE: To facilitate path control over request RQ interruption by providing a means of storing information on whether request RQ interruption is permitted by I/O numbers to a coupling part for bus loops, and by retrieving the contents of the storing means by the I/O numbers in the RQ interruption.
CONSTITUTION: Through Y bus loops 54W56, an X bus loop 57, and a Z bus loop 58, CPUs 51W53 and I/Os 74W79 are connected and can be accesses. Information words transferred via the respective buses are composed of frames including fields indicating I/O numbers A1WA3, a control code C, and an answer code ANS of a reception side. At respective interbus coupling parts 59W62, the numbers A1WA3 in the information words are discriminated to store storing means with information on whether RQ is permitted by the I/O numbers. When RQ is triggered by one I/O, the contents of the storing means are retrieved by the I/O number to exercise parth control on the interruption according to an on/off instruction from the CPU. When the contents of the storing means show that the RQ interruption is not permitted, the answer code is substituted by an abnormality code, which is sent back to the I/O making the request.
COPYRIGHT: (C)1982,JPO&Japio
JP7433980A 1980-06-04 1980-06-04 Path controlling system for request interruption of input and outut bus device Pending JPS57735A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP7433980A JPS57735A (en) 1980-06-04 1980-06-04 Path controlling system for request interruption of input and outut bus device
GB8116665A GB2077468B (en) 1980-06-04 1981-06-01 Multi-computer system with plural serial bus loops
DE19813122076 DE3122076A1 (en) 1980-06-04 1981-06-03 MULTIPLE COMPUTER SYSTEM
US06/270,549 US4468733A (en) 1980-06-04 1981-06-04 Multi-computer system with plural serial bus loops

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7433980A JPS57735A (en) 1980-06-04 1980-06-04 Path controlling system for request interruption of input and outut bus device

Publications (1)

Publication Number Publication Date
JPS57735A true JPS57735A (en) 1982-01-05

Family

ID=13544256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7433980A Pending JPS57735A (en) 1980-06-04 1980-06-04 Path controlling system for request interruption of input and outut bus device

Country Status (1)

Country Link
JP (1) JPS57735A (en)

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