0000013: Graphics garbage when displaying text in Moon Lander

Notes
(0000006) parabellum (administrator) 2008-12-03 14:19 edited on: 2008-12-03 14:24	The text is drawn with a special routine that seem to proceed like that: position the beam to the (left,top) coodinate of the text string Line 1 : draw the line content as the beam moves from left to right (odd lines) moves one line down -> the beam is now located at (right,top+1) Line 2 : draw the line content as the beam moves from right to left (even lines) moves one line down -> the beam is now located at (left,top+2) repeat the last 4 steps for all the lines (repeat two times) This is a neat optimisation as this routine draws text about twice as fast as the original ROM routine does (because it also draws when the beam returns back to the left - whereas the original routine was not drawing anything during the right->left movement). The problem is that the emulator analog timing gets tricked by this behaviour... I'll have to disassemble the rom and locate the routine to see if there's any special 6522 code in it.