| 摘要 |
<p>RESOURCE GRANTING PROCESS AND DEVICE IN A SYSTEM COMPRISING AUTONOMOUS DATA PROCESSING UNITS The present invention relates to a process for the granting of a resource in a system comprising at least two antonomous data processing units in which each unit can request the granting of the resource by means of an individual interface circuit, the interface circuits being coupled to a multiple connection channel conveying systems of the binary type which can assume first and second logic states, each unit also being associated with a particular number and a priority level, wherein for allocating the resource to one of the units a sequence of three conditional control signals generated in autonomous manner by the individual interface circuits is used, namely a first signal, whose positioning in the second logic state indicates that at least one unit is requesting the granting of the resource, a second signal, whose positioning in the first logic state indicates that the resource has not been allocated to any of the units , and a third signal., whose transition from the first logic state to the second logic state simultaneously authorizes the start of a competition between the requesting units followed by the choice of only one of the said units for the granting of the resource and the prevention of account being taken of granting requests following the transition and whereof the reverse transition after a predetermined period validates the chosen unit and leads to the display on the multiple connection channel of a binary word representing the number of the chosen unit,aswell as the new taking into account of requests for granting the resource.</p> |
