Home Page Forums MAME MAME SVN builds - new driver flood

Okay, either I'm missing something obvious (which is probably the right answer, since I'm not exactly very experienced in all these emulation things) or TNZS does things with the VRAM that I don't quite understand.

Basically, the background is rendered as a 16-bit bitmap layer (sprites are only used for the characters and foreground elements), and uses CRTC register 17 to scroll horizontally. From what I can see, the game writes directly to the high VRAM area (0x80000000). So if we look at the point in VRAM where the "split" happens, we see this:



Which is... exactly what's showing up on screen. It corresponds to the black-to-white transition in this:



I'm guessing the bitmap drawing routines are missing something... but since the only documentation I have is in a language I can barely read and the only other open source emulator (FM-bochs) doesn't even run the game, I'm a bit stumped, to be honest.