Alright guys, just a quick update, this time about the RS-90.
Given that SwanEmu would not run smoothly on low end devices due to some issues with the frameskipping code that i have yet to fix, i've decided in the meantime to reuse my old Oswan code and port that instead.
It did require a few small changes but this device would be almost perfect for Wonderswan emulation given that the screen resolution is very close.
The only issue is that i upgraded to the latest firmware release and that firmware has issues with ethernet not working among other issues... So sorry but i was not able to profile like i would have loved to do. Hopefully it's something pcerceui looks at.
In any case, the OPK package is available here : https://gameblabla.nl/files/ipk/rs90/