Gentlemen,
A 310-200/300 and A 300-600(R) aircraft have nothing to do with FBW!!!
Nevertheless there are two identical Flight Control Computers(FCC1 and FCC2) Systems each of which allows to select the following APFD functions:
-stabilizing the airplane around its center of gravity while holding VS and heading(basic modes).
-flying the airplane on an acquired flight path(hold modes).
-aquisition of a new flight path(modes with arming,capture and hold/track/active phases).
-automatic landing with roll out.
-automatic selection of a related autothrust mode in accordance with selected APFP vertical mode.
-flying the airplane in accordance with FMS commands in a vertical(PROFILE) and/or horizontal(NAV) mode.
Does that help?