at address #6000 and #6800 are buffer to store characters's pixels , they behave like videoram.I understand now why the game is a bit slow.Each char is copied into theses buffers before rendering.
4 differents routines feed theses buffers (attributes and chars) , 1 for each mirroring type (N = normal , R = reversed) : * #8D08 - x=N y=N* #8D70 - x=R y=N* #8DDE - x=N y=R* #8E34 - x=R y=R [[User:Fano|Fano]]09:58, 19 November 2009 (UTC)