@dooklink - this thread is moving quite fast so things can get missed. @Stedy is the 'boffin'
so I can't help, although I can link to some of his findings:
http://www.ianstedman.co.uk/Amiga/am...iga_scart.html
http://ianstedman.wordpress.com/gbs-82xx-experiments/
Hopefully @Stedy will spot your post and have some direct comments.
Thanks.