Hi Eric, > Yes it does work. SpaceWar! 7800 uses it with 320B to get B&W graphics > without artifacting. Hmmm....I looked through the SpaceWar! source I have to see if was doing something wrong. It seems you are only using WHITE for P0C2. I changed the value going into CTRL to #$43 and I get the same result using Prosystem. When I find some time I'll have to try it on the real console. Take care, Dennis