Abstract: A method and device for adapting a VME card for use in a VXI system are disclosed. The device resides on a circuit board that is plugged between the VXI bus and the VME card. The device provides two or more sets of VXI configuration registers. Each region of addresses normally used by the VME card is assigned to one of the simulated VXI units, and the device modifies incoming VXI addresses directed to each region so that the VME card responds to the VXI address. The VXI units simulated by the device may include one message-based device and one register-based device, so that both capabilities are available to the VME card. The device buffers signals passing between the VME card and the VXI bus, generating delays and timing signals to produce proper operation of all system components. The device provides bidirectional communication between the VME card and the VXI bus, so that the VME card can be the VXI bus master.