I see all you did was map left and right mousebuttons to (A) and (B ) (and dpad=mouse movement). No need to use custom controls for this - just press START during emulation to switch to mouse emulation mode. Not long back I've changed the mouse-buttons to be on (A) and (B ) in this mode.
I tried that too and I have the same issues in Frontier. I tried it using custom controls as well just to see if it made any difference.
Thanks again for your tests. It's fixed now:
http://repo.openpand...ail&app=uae4all
Btw., tried Frontier myself. At A1200-speed with 800 MHz and frameskip 1 it's playable but at A1200 Turbo-speed with 1050 MHz (and still frameskip 1) it seems to run very well.
Best screenmode for Frontier is 320x200 upscaled preset mode ([R]+[L]+1), Vertical Position 2 and I suggest reducing
mousespeed to
.5 or
.25.
Some info about the game: accelerate with "Return", decelerate with "Right Shift", move with "hold right mouse button+dpad", fire with SPACE (use custom controls to set these to the ABXY-buttons).
Attached a Frontier reference.