Sega Saturn core with blackscreen

So i found that Sega Saturn(Yabuse) core is avaiable for iOS but its not booting, any idea why? I have never used this machine ever, so dont know if it needs bios files or something special. Can someone tell what it could be happening please?

BIOS should be optional for that core but it’s going to be super-slow on any iOS device. IMO, that core’s not really very useful at the moment because it lacks a dynarec to make it work at reasonable speeds.

I see. So no dynarec at the moment. Thanks, that explains all.

So, it finally booted but has a loooot of bugs. It has nice speed but real graphic issues.