I think I am closer to working out why my Saturn wont work on my XRGB3. I have just got my model 1 mega drive working on c-sync and its absolutely gorgeous!
So after a little googling, I found that PAL consoles have 9v coming out of the c-sync pin on the AV out. This isn't a huge issue for me as I am using a 9 pin computer connector so I can make my own cables.
The only thing I cant find is where c-sync comes from. If some one could shoot me a link, much appreciated!
One thing I cant stand is the DC power supply. Its bloody dangerous! Just fried my S/PDIF mod chip... so very sad