There's also MMX- and SSE2-optimized byteswapping code, which is used quite a bit when loading ROMs and loading/saving savestates.
Other changes include some Win32 compatibility improvements (use of "\\?\" for long filenames on NT-based systems) and the use of popt for command line parsing.
The major blockers right now other than packaging:
- Sega Pico pen support.
- Fix a DMA regression caused by attempting to fix test failures in VDPFIFOTesting. The DMA subsystem needs a complete rewrite, which isn't doable at this point, so I just want to get it working back to how it was in Gens/GS r7.
I'm planning on releasing Gens/GS II Technical Preview 1 sometime this month. Hopefully I can get it all done.
Reason for edit: +popt