Surely an A4000T doesn't have to connect to the Lisa chip does it?
It could be a video slot card with a zorro interface no? All the signals should be there, no?
Except there is a video sync issue with the 4000T video slots. I have a scandoubler card that works great on a 4000 but has glitches on my 4000T. I talked to an Amiga tech, Ed from Kansas, who said this is normal and that it affects the Toaster too. He didn't know of a fix but mentioned a couple of things that could solve the problem. Either the Indivision on the Lisa or Indivision on a video slot card with a video slot fix would be nice. Both have their advantages and disadvantages but either is better than the few solutions 4000T owners have now.