@Darrin: How compatible is your Chameleon64 compared to the original Minimig? I've the Chameleon too and I find it's rather incompatible at the moment... Lost Vikings or Ishar won't play (black screens, gurus...) and they are perfect with the Minimig 1.1.
I'm using the exact same HDF I use in the Minimig, just copied it over to the Chameleon.
Sorry for the little offtopic...
Like you, I started testing using the same HDF I use on my Minimig v1.1 and I found that certain games that worked on the v1.1 wouldn't on the Chameleon. I put this down to either the early version of the Minimig core containing bugs, the soft 68000 containing bugs or a combination of both. As the Chameleon64 core lacked joystick support I was also forced to test games using the keyboard keypad. I eventually gave up in frustration. There is now an updated core available for me to test, plus I have the CDTV controller to use as a joystick so once I have some time I'll start testing again.
I'd like to have the updated FPGA Arcade core first so that I can test games on all 3 FPGA solutions at the same time.
At this moment in time, the Minimig v1.1 is the most stable/compatable solution, probably due to the length of time that has been spent tweaking the core, plus it actually uses a real 68000.