A method for managing frames in a computer providing an operational function and a gateway function between two communication buses in order to transmit messages from a transmitter to a receiver, including: receiving messages from a transmitter via the first bus; storing the received messages; triggering an interrupt of the execution of an operational program causing the processing of the stored messages for transmission to the receiver via the second bus; deactivating the interrupt in order to continue the execution of the functional program, after the expiration of a duration and at the end of the processing of a message currently being processed during the expiration; and, triggering a new interrupt at the end of a timeout of a duration of the execution of the operational program causing the processing of messages stored for transmission to the receiver via the second bus to continue.