I have a Playstation 1 Core compiled, it is a bit slow though. On x5000 (or Mirari Hardware) it would be okay I guess. Not sure about sound, if it will jerk even on those. FPSE will be faster. In the future I want to do 3DHW Support (though first for AmigaOS 4/MiniGL, later backport to MOS/TinyGL) but that is for now out of scope. Once I do this this should make things faster.

Nintendo 64 -> No JIT. Code for 3D HW probably hard to port.
Sega Saturn -> Compiles. But crashes in SH2 Emulation. Probably Endian related ?
Gameboy Advance -> I have a MGBA Core, which supports Gameboy Advance

A lot of Cores are not yet released as they are in the main package which is still in Beta. You can get access against a donation

Currently in the Beta 28 are cores for:

- A5200
- CPC (Caprice32)
- ZX Spectrum (Fuse)
- Atari Lynx (Handy)
- NeoGeoPocket (Mednafen)
- PC-Engine/Supergrafx16/PC-Engine CD (Mednafen)
- Gameboy/Gameboy Color/Gameboy Advance (MGBA)
- NES (QuickNES)
- Atari2600 (Stella2014)
- C64 etc. (Vice)
- Atari Jaguar (Virtual Jaguar, though this one like the PSX one is very slow)

In "Premium Packages" (only for people who donated) are still:

- NeoGeo MVS/AES (Geolith)
- NeoGeoCD (NeoCD)
- Playstation 1 (Mednafen)
- Video and Audio Filters

In the uploaded Cores on MorphOS Storage there are:

- NeoGeo (FBNeo)
- Mame 2003 (0.78), Mame 2003+ (0.78+), Mame 2009 (0.135u4), Mame 2010 (0.139)
- Picodrive
- Genesis Plus

Gruß,
Steffen