NEO4ALL is an alternative open source NEOGEO/CD emulator for Dreamcast by Chui & Fox68k.

Features:

* Close to fullspeed emulation (frameskip0 with sound-fx).
* Fast FAME Motorola 68000 core by Fox68k.
* Fast FAZE Zilog Z80 core by Fox68k.
* Custom PowerVR2 graphic core (fast tile caching).
* Autoframeskip for real speed.
* Joystick is emulated with analog and digital pad + A,B,X,Y and Start/R-Trigger.
* Complete menu with L-Trigger: region selector, frameskip control, graphic filtering, hardware reset…
* Crystalline sound without lag.
* Both control players emulated.
* SD-Card support for loading ISO/BIN/MDF images.

Thanks to http://www.dreamcast.es/news.php?readmore=492 for the news.

http://chui.dcemu.co.uk/neo4all.html