...And I have Windows running on it and everything is fine and dandy eeeexcept sound cards don't work !

I haven't yet quite figured out why things don't work, but it seems it is a timing issue.
Only card that I could get play something briefly was a Vibra16, it played for a bit then went silent and machine froze. Aztech Sound Galaxy, various SB16 cards and my Yamahas don't work. I/O seems to work, rest I am not sure about at all...
I can certainly see activity on the scope, but it seems to be related to HDD access more than anything else...

The DOS Yamaha util says it cannot find the card, that seems to indicate that not all the IO range is accessible. I'll have to do some testing, maybe it is the case and I have to move the IO ranges to something much lower, like I had to on my Intel C2D based board with somewhat limited ISA slot.

I really hope I can get things running, I have come so far already !

Mature because of middle finger :P