updateMovieEnabled is a boolean. It's a flag to signal that the changes
in the movie need to be saved when branching to another movie.
The variable is implemented but without any side effect.
The traceLoad property can be 0, 1, 2 or 3. It specifies how much
verbosity is shown when loading cast members.
It's a bt useless for ScummVM. We have our own verbosity mechanism.
Furthermore ScummVM loads all casts up front and unload is a no op.
The actorList is a global array property. Birthed scripts can be added
to it. The `stepFrame` method is called on all objects in the array on
every frame. < D4 had an executePerFrameHook for this.
In Director the exitLock prevents quitting the program when it's set to
TRUE. get and set for the exitLock is implemented.
The underlying functionality, preventing exiting a program, is not
implemented. ScummVM should always respond to a QUIT event.
The Mac version only shows a copy protection screen if you explicitly
ask for it, and the unofficial talkie version doesn't show one ever.
Therefore there is no reason to trigger the virtual keyboard.
the searchPath is an array that contains paths that need to be searched
when opening a file. It's a property on the same global level in the
same way itemDelimeter is.
The searchPath is set via cb_theassign2. It's used for assigning
properties to the movie itself. `g_lingo` in the case of ScummVM.
The only known case for cb_theassign2 is in the game Louis Catorze
where it's only used for the searchPath.
Note: cb_theassign() does the same thing for script and factories
The framerate byte is now understood. A framerate byte of 0 means a
framerate of 3. Which is handled during framerate parsing.
The check for 0 is therefor redundant.
In Director 2 and 3 framerates are preset and referenced as: 0x0 to 0xF.
Some movies set a framerate of 0x10.
D2 and D3 interpret this as a framerate of 15.
Which was measured to be exactly the same as setting a framerate of 15.
In D4 it's shown as a framerate of 120.
Movies with a framerate of 0x10:
D2: DATA/WARLOCKSHIP/REUNION (spaceship warlock)
D4: ping.dir (chop suey)
