Hi.
I have also problems with the stock 747. It seems the EFIS commands are not available. I´m using VRInsight MCP Combo hardware and it does not send any of those commands to game (other commands like heading, radios, etc work well and are sent by the device to game). But remap to any other standard joystick using the available commands from FSUIPC list does not work either. Are they working or is that like in the 787 they are not implemented as you answered in the previous post? See pic for the related commands (all starting with the tag "EFIS" in the list).
On the other hand I don´t find in the list any commands for the map modes (the buttons WXR, STA, WPT, APRT, DATA, POS and TERR as seen on the cockpit EFIS panel). Are they available somehow as well?
Cheers