Just tried Xenon II and it works great. Fantastic bit of coding. Thanks for porting your emulator to the Dingoo. I shall dig out some more classic ST games later and give em a blast.
Regarding mouse support, Could the mouse movement speed be "User defined"or scaled 50%,100% faster so that Dungeon Master is playable. I say this as the "default" speed is normally a tad slow for this particular game. No great shakes if this is not possible.