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 inputsInfo
- 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
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.
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)
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 |
-
1973
- 1973-03-13 RO RO7414573A patent/RO58198A2/ro unknown
-
1974
- 1974-03-11 FR FR7408141A patent/FR2221767A1/en active Granted
Cited By (1)
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 |