Here’s the time for another release of Genesis Plus. I have focused myself in fixing some bugs I introduced in the previous version, as well as emulating most of unlicensed “non-working” games (many thanks to Haze for his work).

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I also made some progress about emulating an original YM2612 bug that made some games (Ariel, Shaq Fu, Comix Zone, Spiderman & Animated Series,…) sound correct on real hardware but wrong on emulators.

Finally, I added SVP emulation thanks to the great work of Tasco Deluxe and Notaz : as a result, Virtua Racing is now fully playable but don’t expect to run it full speed in gamecube mode. It needs to emulate a custom DSP running at 23Mhz which takes a lot of CPU time actually. You can still underclock the DSP but it will result in slower 3D rendering and effective framerate will still seem slower.

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That’s why, to celebrate the last release of LibOGC which added Wii hardware support, I also release a special elf version that could be running in native Wii mode using the recent “Twilight hack“. Please note that this version remain completely UNTESTED as I personnaly don’t have any way to test it on Wii. SO, tell me if the above game is at least running faster ;)

Here is a complete changelog for this release:

[Genesis]
- added SVP emulation: Virtua Racing is now emulated (big thanks to Notaz and TascoDeluxe)
- fixed VDP registers behaviour when VDP Mode 4 is enabled: fix Bass Masters Classic Pro, Captain Planet & The Planeeters
- corrected a bug in DMA Fill operation: fix James Pond 3, Rockman World/Megaman Willy Wars (corrupted VRAM)
- corrected typo errors in CPU cycle counters update: fix optiom screen music in “College Slam” and probably others games.
- added preliminary support of undocumented YM2612 bug: fixes soundtracks of Shaq Fu, Spiderman, Comix Zone, Ariel and some others
- added support for mappers & copy protection devices used in many unlicensed/pirate cartridges (see cart_hw.c for details)
- rewrote memory handlers for better modularity and some (little) speedup
- reduced Savestate size

[NGC]
- compiled with last LibOGC (20080228): fix issues when unplugging controller, support for Wii mode (see release.txt)
- added “hard-coded” IPL font (no more direct access to BOOTROM): fix font problem for Qoob users
- added SDCARD Slot B support for loading Roms
- removed unused MAME PSG Core
- added ‘Force DTACK’ option for prototype games usually hanging on real hardware (example: Sonic Crackers)
- added an option to underclock SVP core (with default cycle count, Virtua Racing actually does not run fullspeed in GC mode)

As usual, binary files can be downloaded from Tehskeen.