Reicast/Naomi many issues

I have some issues with Reicast, the main one is widescreen doesn’t work, neither Dreamcast nor Naomi. I thought I needed some cheat codes like these, but Retroarch only accepts internal cheats which I downloaded, but without options for widescreen.

For Naomi I tried Samurai Shodown VI and it rendered sprites with several issues, layer depth, vertical artifacts… I read on the option Extra Depth Scaling, but there’s no such in current builds. I tested with several settings per-pixel, per-stripe, etc with same problems.

Also in Naomi I loaded Ninja Asssault but I can’t perform any action. Under Controls the only actions I can remap are START, COIN, and TRIGGER, and TRIGGER doesn’t perform any action whatsoever.

Any help on this is very welcome.