FR2221767A1 - Computer interrupt cct with automatic priority modification - allows low priority input after predetermined number of top priority inputs - Google Patents

Computer interrupt cct with automatic priority modification - allows low priority input after predetermined number of top priority inputs

Info

Publication number
FR2221767A1
FR2221767A1 FR7408141A FR7408141A FR2221767A1 FR 2221767 A1 FR2221767 A1 FR 2221767A1 FR 7408141 A FR7408141 A FR 7408141A FR 7408141 A FR7408141 A FR 7408141A FR 2221767 A1 FR2221767 A1 FR 2221767A1
Authority
FR
France
Prior art keywords
priority
top priority
inputs
cct
predetermined number
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
FR7408141A
Other languages
French (fr)
Other versions
FR2221767B3 (en
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.)
PENTRU INTRETINER INTREPRINDER
Original Assignee
PENTRU INTRETINER INTREPRINDER
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 PENTRU INTRETINER INTREPRINDER filed Critical PENTRU INTRETINER INTREPRINDER
Publication of FR2221767A1 publication Critical patent/FR2221767A1/en
Application granted granted Critical
Publication of FR2221767B3 publication Critical patent/FR2221767B3/fr
Granted 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
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/16—Handling requests for interconnection or transfer for access to memory bus
    • G06F13/18—Handling requests for interconnection or transfer for access to memory bus based on priority control

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Bus Control (AREA)

Abstract

Low priority inputs are serviced in the normal sequence until delayed by repeated service requests on the top priority port. When a low priority signal is received and not immediately acted upon a counter associated with its input starts to record the number of top priority interrupts. If this number exceeds a pre-determined figure the sequence is changed and the waiting signal is given top priority. The system is designed to ensure that top priority users obtain preferential treatment but without completely neglecting low priority users when several top priority users are at work.
FR7408141A 1973-03-13 1974-03-11 Computer interrupt cct with automatic priority modification - allows low priority input after predetermined number of top priority inputs Granted FR2221767A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO7414573A RO58198A2 (en) 1973-03-13 1973-03-13

Publications (2)

Publication Number Publication Date
FR2221767A1 true FR2221767A1 (en) 1974-10-11
FR2221767B3 FR2221767B3 (en) 1976-12-17

Family

ID=20091987

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7408141A Granted FR2221767A1 (en) 1973-03-13 1974-03-11 Computer interrupt cct with automatic priority modification - allows low priority input after predetermined number of top priority inputs

Country Status (2)

Country Link
FR (1) FR2221767A1 (en)
RO (1) RO58198A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411442A1 (en) * 1977-12-09 1979-07-06 Ibm DEVICE PROCESSING INTERRUPTIONS OF PROGRAMS IN A DATA PROCESSING SYSTEM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411442A1 (en) * 1977-12-09 1979-07-06 Ibm DEVICE PROCESSING INTERRUPTIONS OF PROGRAMS IN A DATA PROCESSING SYSTEM

Also Published As

Publication number Publication date
FR2221767B3 (en) 1976-12-17
RO58198A2 (en) 1975-06-15

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Legal Events

Date Code Title Description
ST Notification of lapse