Also there is supposed to be some difference with positioning of PM graphics though it would need further investigation.
I think we confirmed the behaviour long ago. The difference is the alignment (one half cycle) between hires on one side, and both lorez and players on the other. And the different artifacts is just a consequence of this alignment.
We have die shots of CTIA, but only for the top layer. It is difficult to read the complete silicon layout without delayering (removing the top metal layer). It would be nice if another CTIA could be saved for another decap round.
See this thread: http://atariage.com/...8-ctia-vs-gtia/
Edit: Added link to old thread about ctia vs gtia
Edited by ijor, Mon Mar 5, 2018 10:08 PM.