US4553202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
User controlled dialog resource switching in a multi-tasking word processor
Assignee: International Business Machines Corp
•
Filing: 1982-05-06
•
Granted: 1985-11-12
•
Expires: 2002-05-06
Abstract
Abstract User actuates real time resource reallocation in a multi-tasking environment wherein the operating system builds a process queue against a resource and wherein a new task is interrupt invoked with the dispatcher allocating the resource to the next task in the queue, the queue switching being orthogonol to the dispatcher scheduling of processes.
Inventors
- 👤 Nicholas Trufyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:07
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/46; G06F9/48; G06F9/4806; G06F9/4843; G06F9/4881; G06F9/52
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A method for the real time reassignment of input or output means coupling a multi-tasking processor in which switching from task to task is selectively invoked by interrupts including interrupts invoked through the input means, comprising the steps of: building a linked list of identities of those tasks which call the input or output means and embedding pointers defining a dispatching order there among in counterpart task descriptions; and responsive to an interrupt invoked through the input means, reassigning the input or output means from the task currently executing to the next task in order on the linked list; whereby assignment of the input or output means is rotatable among only those tasks in linked list order.
Claim 2
Independent Claim
117 words
A method for the real time reassignment of input or output means coupling a multi-tasking processor in which switching from task to task is selectively invoked by interrupts including interrupts invoked through the input means, comprising the steps of: building a linked list of identities of those tasks which call the input or output means and embedding pointers defining a dispatching order there among in counterpart task descriptions; and responsive to an interrupt invoked through the input means, reassigning the input or output means from the task currently executing to the next task in order on the linked list; whereby assignment of the input or output means is rotatable among only those tasks in linked list order.
Claim 3
Independent Claim
123 words
A method for real time reassignment of input or output means coupling a multi-tasking word processor in which switching from process to process is selectively invoked by interrupts including interrupts invoked through the input means, comprising the steps of: forming a queue of processes requiring input or output means and embedding pointers defining the dispatching order among the queued processes in the counterpart process description; and responsive to an interrupt through the input means, causing a dispatcher to save the state vector of any process currently executing upon the processor in its process description, retrieve a state vector of the next process in the queue in pointer order from the process description of said next process, and transfer control to said next process.
Claim 4
Independent Claim
123 words
A method for real time reassignment of input or output means coupling a multi-tasking word processor in which switching from process to process is selectively invoked by interrupts including interrupts invoked through the input means, comprising the steps of: forming a queue of processes requiring input or output means and embedding pointers defining the dispatching order among the queued processes in the counterpart process description; and responsive to an interrupt through the input means, causing a dispatcher to save the state vector of any process currently executing upon the processor in its process description, retrieve a state vector of the next process in the queue in pointer order from the process description of said next process, and transfer control to said next process.
Claim 5
Dependent Claim
18 words
A method according to claim 2, wherein the input or output means respectively include a keyboard or display.
References Cited (Backward Citations)
US4152761A
Cited
US4145739A
Cited
US4149243A
Cited
US4229790A
Cited
US4247906A
Cited
US4225922A
Cited
US4384324A
Cited
US4435780A
Cited
US4403288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |