Matches 251 - 278 out of 278 < 1 2 3 4 5 6
Match Document Document Title
5414857 Adaptive processor interface operable with different types of processors  
A system controller controls subsystems in a computer. The system controller is operable with a processor in a computer. The system controller includes a plurality of decoders, each of the decoders...
5371893 Look-ahead priority arbitration system and method  
An improved arbitration system is disclosed for arbitrating signals at a plurality of input nodes to output nodes where each input node can access any output node. The system includes a FIFO...
5289583 Bus master with antilockup and no idle bus cycles  
Bus master for use in computer system includes logic for determining the number of words remaining to be transferred in a DMA operation to supply signals to permit arbitration to start for the next...
5239651 Method of and apparatus for arbitration based on the availability of resources  
A method and apparatus for arbitrating among multiple requested data transfers based on the availability of transfer resources. A request for the control of a resource is transmitted to an arbiter...
5206952 Fault tolerant networking architecture  
A fault tolerant network for a plurality of computers includes a system for controlling access to shared peripherals. Access to the shared peripherals is coordinated among the computers by means of...
5193196 Process request arbitration system which preferentially maintains previously selected process request upon receipt of a subsequent request of identical priority  
A plurality of process requests generated from processing units, for example, direct memory access (DMA) channels are controlled by a preference circuit in accordance with a priority level assigned...
5179705 Asynchronous arbiter state machine for arbitrating between operating devices requesting access to a shared resource  
A system has a shared resource, such as a bus or memory, with which various devices may communicate upon a request being granted by an arbiter. In order to reduce the arbitration time, the arbiter...
5168570 Method and apparatus for a multiple request toggling priority system  
A multiple request toggling (MRT) arbitration system for prioritizing requests to a set of shared resources by multiple requestors, especially requests by multiple processors to shared resources in...
5072363 Multimode resource arbiter providing round robin arbitration or a modified priority arbitration  
A multimode shared resource arbiter circuit is provided by a programmable array logic module programmed to provide round robin arbitration, or round robin/modified priority arbitration between...
5050074 System for facilitating coordination of activities by a plurality of actors with an object database and state/action identification  
A new activity coordination system coordinates actions in connection the various constituents of an activity by a plurality of actors. The system includes a plurality of objects each associated...
5025370 Circuit for preventing lock-out of high priority requests to a system controller  
Lock-out of pending higher high priority requests to a system controller is prevented by a circuit which comprises a counter element for counting the number of times the pending higher high...
4894565 Asynchronous digital arbiter  
An asynchronous digital arbiter circuit suitable for use in computer systems applications requiring fast asynchronous arbitration between two asynchronous inputs. The arbiter resolves which of two...
4881195 Multi-requester arbitration circuit  
A multi-requester arbitration circuit receives multiple asynchronous request signals and provides a first common timing signal from the request signals. A sample-and-hold circuit receives each of...
4780822 Semaphore circuit for shared memory cells  
A semaphore circuit is disclosed which employs a pair of storage elements; an arbitrator, which is driven by the storage elements; and another pair of storage elements, which are driven by the...
4774660 Increased bandwidth for multi-processor access of a common resource  
This circuitry permits equal access to a shared resource by a number of central processing units (CPUs). In a multiple CPU arrangement, common resource contention problems arise, when several CPUs...
4755938 Access request control apparatus which reassigns higher priority to incomplete access requests  
The present invention relates to an access request control apparatus and more specifically to an apparatus for determining priority between a plurality of access requests in a memory control...
4719569 Arbitrator for allocating access to data processing resources  
The present invention provides an improved arbitrator for use in allocating access to a common resource coupled to a plurality of data processing devices ("agents"). An arbitrator is coupled...
4672536 Arbitration method and device for allocating a shared resource in a data processing system  
An arbitration method and device for a data processing system wherein N units share a common resource, to allocate the shared resource to a given unit selected from a number of units requesting...
4638428 Polling control method and system  
In a terminal control unit having a polling function to a plurality of terminal devices, the number of times of continuous non-response to the polling is counted for each terminal device address....
4600992 Priority resolver with lowest priority level having shortest logic path  
A data processing system including a dual ported main memory that can be accessed by I/O controllers via a common bus or directly by the central processing unit. The main memory is comprised of a...
4597054 Arbiter circuit and method  
Arbitration as provided in two separate levels, first between two signals that may contend for access to a system resource, such as a memory, and second between the winner of the first arbitration...
4594657 Semaphore for memory shared by two asynchronous microcomputers  
An improved semaphore is described that arbitrates the access of a memory shared by first and second microcomputers operating asynchronously at the same speed or at different speeds. The semaphore...
4503495 Data processing system common bus utilization detection logic  
A common bus utilization detection logic that is used when a particular device connected to a common bus has been granted access to the common bus wherein bus access is granted on a priority basis....
4418385 Method and device for arbitration of access conflicts between an asynchronous trap and a program in a critical section  
Attempts in a data processing system to requisition a process able to have critical section operating phases by means of asynchronous trap(s) are arbitrated. Each time the process enters a critical...
4380798 Semaphore register including ownership bits  
A semaphore register for use in a peripheral controller includes a semaphore bit which when not set indicates the availability of a shared resource, an internal ownership bit which when set...
4335448 Electronic control system  
An electronic control system particularly suited for use with an automatic fuel dispensing system uses a centrally located computer to supply serial polling signals to various sub-stations. At the...
4214305 Multi-processor data processing system  
A multi-processor data processing system comprises, in addition to a main memory unit which is common to a plurality of processors, a queue buffer which is common to the processors to store...
4130864 Priority selection circuit for multiported central functional unit with automatic priority reduction on excessive port request  
A data processing system includes a shared functional unit having access and egress through a plurality of communication channels to several data handling units. The communication channels are...
Matches 251 - 278 out of 278 < 1 2 3 4 5 6