Something to remember when viewing this - the Atari only has 2 sprites and 2 missiles.
http://www.youtube.c...tch?v=wRxdl2T8nlQ
The color's didn't come out well with the camera, here's a screen capture video of the new stealth mode
http://www.spiceware...ranticStealth.mov
I'm able to draw all those robots by repositioning the sprites on the fly as the screen is drawn. One of them takes 2 scan lines to reposition, the other 3. The ARM code implements a flicker routine for the instances when there are more than 2 sprites in the same horizontal band. This is noticeable in the screen capture video, especially the first room where there are 5 robots at the bottom of the screen. On a real CRT the flicker isn't as bad as in the screen capture as the phosphors glow long enough to make it more subtle. However, it's not as good as the YouTube video where no flicker is apparent.
If you'd like to try it out yourself you can use Stella.
http://stella.sourceforge.net/
Instructions in the first post, along with a link to the rely with the latest build.
http://www.atariage....560-frantic-2600/