What about the Graffiti by Individual Computers? I have saw the write up on their website and not entirely sure what it does, it seems it is what Robert17 wants but I'm skeptical...
The Graffiti is only supported by 4 Programs and that are: Trapped, Trapped II, Nemac IV and Shapeshifter (the only way to use 256color Display in an exeptable speed without an RTG-Board). There are some viewers that use it too, but that about all. It is a really nice card and it is a shame that it didn`t get that much support say in a form of an CGX/P96 driver.
