Abstract: In order to connect a computer comprising plural redundant processors to at least one digital data transfer bus, the interfacing device embodying the invention comprises: a means for synchronizing and comparing the transmission and reception requests respectively transmitted by the processors, and for triggering processing of a request when the latter has been transmitted by all the processors, a means for transferring the data blocks to be transmitted or received between a controller of said bus and the respective working memories of the processors, and a means for triggering the transfer of a data block if the latter is simultaneously at the output of all the processors, from one of the working memories to said bus controller, with a view to transmission thereof on said bus.

Abstract: In order to have the functional modules of a local unit communicate with one another and with an external bus, the device embodying the invention comprises: at least one internal bus of the same type as the external bus per functional module, the latter being coupled to the internal busses so that each module is the sole transmitter on at least one of the internal busses and is a receiver on the other internal busses; an additional internal bus for each external bus of the same type as said internal busses, ensuring the dissemination to the functional modules of data transiting on the external bus; and a coupling module ensuring transfer towards the external bus of the data circulating on the internal busses and destined for another local unit connected to the external bus.

Abstract: The method embodying the invention comprises management by a coprocessor of the time slicing, from a pre-established frame, of the processing cycle of the processor, into slices of possibly different durations, of the allocation of the time slices to the different functions installed according to one or plural pre-established layouts, of the saving at the end of the machine context slice of the function being processed, this with a view to resuming this function during the following slice associated with it and of the loading, at the start of a new slice, of the machine context linked with the activating of the function associated with this slice and which was previously saved at the end of a previous slice corresponding to this function. The invention applies to the optimizing and security of real-time management in modular avionics architectures.