I am wanting to expand my knowledge of assembly, so I'm beginning work on a second game. It took at least a few hours to start a new game from scratch. I want to draw a different playfield though, just stars since this game is set in outer space (yes, another one.) I am wanting to draw the constellation Ursa Major and call the game that as well since we need more 2600 games that start with the letter U. So my question is, how does one go about figuring out what the values in PF0, 1, and 2 do? I mean, for example, I used the playfield in Dodgeball just to see if I could. Its PF values are in lines 344-399 in my code. The problem is, I don't know why those specific values produce exactly what's on the screen.