I´ve tested the MYst Masterpiece Edition and the Original Myst Version on the PSP Port of ScummVM (latest Daily Build).
The Classic Myst Version is running fine.
But the Myst: Masterpiece edition is running very bad.
ScummVM needs to load 20 Seconds for each Picture (or scene). So it is not really playable.
As I know the Myst: Masterpiece Edition uses JPEG compression for Pictures. Maybe the Media Engine of the PSP can boost the Loading Speed of JPEG files?
I am not sure, if the compression is the Problem. But the light of the memory stick is not flashing all the Time, while Loading. Just in the beginning.
Myst: Masterpiece Edition performance
Moderator: ScummVM Team
That makes sense because it isn't supported (yet)