@_dx - have you tried looking at the link to some docs in Google Docs here on the first post. Maybe something here to help you?
http://shmups.system11.org/viewtopic.php?f=6&t=52172
@dooklink - I read on shmups about people's comments regarding colours on Megadrive. I was wondering if there are similar things that apply to the AMIGA also apply to the Megadrive. As @Stedy's investigations a while ago found that some of the signals outputed were too strong for LCD TV's (but ok on original CRT) and he recommended adding resistors to many of the signals