bsnes : A Super Famicom/SNES emulator written with absolute accuracy in mind ( http://byuu.org/bsnes/ )
bsnes-plus : A feature-oriented fork of bsnes mostly aimed at debugging ( https://github.com/devinacker/bsnes-plus )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a roslin
For Paludis use this rsync : rsync://gentoo.zugaina.org/roslin-portage
If you have a problem : ycarus(-at-)zugaina.org