I've tried a bunch of cores: fbneo_libretro, fbalpha2012_neogeo_libretro, fbalpha2012_libretro, mame2000_libretro, mame2003_libretro, mame2003_plus_libretro, mame2010_libretro, mame_libretro
All have the same result: mouse cursor turns into a pinwheel for a few seconds while it tries to load and then... nothing.
These roms (Metal Slug games) were working fine with the fbneo_libretro core last week. I updated all Retroarch installed cores and now not working. Normally with FBneo core compatibility issues due to new release I'd expect the core to load and present the "this rom is known but..." error message but that's not happening. Nevertheless I think that is the issue.
Is it possible to download FBneo v1.0.0.02 core from somewhere? Google isn't showing up much when I search.
Also would love an alternative emulator which has command line switches (can be used with Launchbox) if anyone has recommendations. Only thing is I definitely want to play the roms in home console (AES) mode; not the arcade cabinet (MVS) mode.