JPS55119724A - Priority selection circuit - Google Patents

Priority selection circuit

Info

Publication number
JPS55119724A
JPS55119724A JP2666579A JP2666579A JPS55119724A JP S55119724 A JPS55119724 A JP S55119724A JP 2666579 A JP2666579 A JP 2666579A JP 2666579 A JP2666579 A JP 2666579A JP S55119724 A JPS55119724 A JP S55119724A
Authority
JP
Japan
Prior art keywords
priority
processing request
circuit
processing
designation
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
JP2666579A
Other languages
Japanese (ja)
Inventor
Isamu Yasui
Akio Shoda
Tadashi Nakanuma
Katsuji Horiguchi
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
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone 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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP2666579A priority Critical patent/JPS55119724A/en
Publication of JPS55119724A publication Critical patent/JPS55119724A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable quick and suitable processing to the processing request source taken place in case of failure, by processing the processing request source in response to the priority designation input with most priority when the priority designation input is present to the designation circuit.
CONSTITUTION: The priority circuit consisting of the FF1...4, counter 16, decoder 17, AND gates 18...21, outputs the processing request from a plurality of processing request sources with fixed processing priority sequence. Further, the priority designation circuit 36 can designate one of the processing requests independently of the priority and the priority alteration circuit 22 selects the processing request from the processing request source in response to the designatiok output from this designation circuit with priority. When priority designation input is present to the circuit 36, the processing request source in response to the priority designation input is processed independently of the priority of priority circuit with the most priority. Thus, the processing request taken place in failure can quickly and suitable be processed.
COPYRIGHT: (C)1980,JPO&Japio
JP2666579A 1979-03-09 1979-03-09 Priority selection circuit Pending JPS55119724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2666579A JPS55119724A (en) 1979-03-09 1979-03-09 Priority selection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2666579A JPS55119724A (en) 1979-03-09 1979-03-09 Priority selection circuit

Publications (1)

Publication Number Publication Date
JPS55119724A true JPS55119724A (en) 1980-09-13

Family

ID=12199692

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2666579A Pending JPS55119724A (en) 1979-03-09 1979-03-09 Priority selection circuit

Country Status (1)

Country Link
JP (1) JPS55119724A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58223850A (en) * 1982-06-23 1983-12-26 Panafacom Ltd Data processing system including priority deciding circuit
JPS60175149A (en) * 1984-02-21 1985-09-09 Nec Corp Interruption control device
JPS6335141U (en) * 1987-07-07 1988-03-07
JPS63269231A (en) * 1987-04-27 1988-11-07 Pfu Ltd Interruption priority control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58223850A (en) * 1982-06-23 1983-12-26 Panafacom Ltd Data processing system including priority deciding circuit
JPS60175149A (en) * 1984-02-21 1985-09-09 Nec Corp Interruption control device
JPH0443302B2 (en) * 1984-02-21 1992-07-16 Nippon Electric Co
JPS63269231A (en) * 1987-04-27 1988-11-07 Pfu Ltd Interruption priority control system
JPS6335141U (en) * 1987-07-07 1988-03-07

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