I think the the Concorde was the first FBW airliner. Even if it compared to modern systems is a rather rude system.
I think that there is some confusion about 2-axis and 3-axis control in an earlier post.
The Airbus system has in some way a 2-axis input, but of course the output must be on all 3 axis. ´
In normal flight you control the attitude only with roll and pitch input on the sidestick. Input to the 3rd axis - gearing (or rudder) - is then automatically calculated from the roll and pitch input plus other flight parametres such as indicated airspeed and angle of attack etc.
Any input on the rudder pedals is then added to the computer generated rudder input.
That means that during normal flight you won't have to worry about your pedals - it will automatically "keep the ball in the middle".
Normally you will hardly touch the pedals until you line up for landing in crosswind. Until then you may cross your legs instead.
I don't know such detail about the 777. Incidentally there are no 777 flight crew members among my near friends.
So please tell us here if you know. If you can do it in technical terms, and not in A vs. B emotional terms, then you will be my friend...
Best regards, Preben Norholm