Patent ID: 7765356

Claim:
A data modifying bus buffer comprising: a first databus that is adapted to convey signals having a MIL-STD-1553 protocol; a second databus that is adapted to convey the signals having the MIL-STD-1553 protocol; a first switch that is configured to selectively couple the first databus to the second databus through an original or an alternate path, wherein the switch is operable to transfer messages via the original path with the switch in a closed position; and a buffer controller that is operable to monitor the first databus for the presence of a particular message having an address of a peripheral device coupled to the second databus and a message type such that when the particular message is found, the controller is operable to instruct the first switch couple the first and second databuses via the alternate path; wherein the particular message comprises a header portion and a data portion, and wherein, in response to identifying the presence of the particular message having the address of a peripheral device and the message type, the buffer controller is operable to modify the data portion of the particular message prior to transferring to the second databus.