nullDC-Naomi SVN r78 is released. nullDC-Naomi is an open source NAOMI Arcade System Emulator. It will NOT run Dreamcast games.

nullDC-Naomi SVN Changelog:
r78
GDROM region patching works once more (fixes issue 234 )
dsp.regs.MDEC_CT-- is buggy

Download: nullDC-Naomi SVN r78
Source:Here