Xenon 2 - black screen when starting the game

[ITotalJustice]

The game reaches the title screen, however starting the game causes a black screen, although the audio continues to play.

Interestingly, disabling audio in the menu then allows the game to continue to work. I am quite sure this is interrupt related.

May also be related to #27

[ITotalJustice]

i don't think this is related to register R. the game only uses this for the background stars. basically, using it a rng number.

you can disable this effect by setting REG_A=0 in LD_A_R)

[ITotalJustice]

the game can also play the demo just fine (happens if you idle too long on the title screen) with audio. kinda baffled by this...

[ITotalJustice]

This could be due to the fact that the game is pal only, and the emulator (currently) is ntsc.

Apparently this game has some trouble running on ntsc converted consoles? But they only mention slowdown...

I guess the next best thing to do would be to implement pal support, and see if that fixes it.