Glokenpop

Ah thanks - I thought that was what must happened but I didn't think the Atari could do that. I assume it was able because of the simplicity of the aliens - they don't move quickly or have much logic so some extra code to change them is possible.

Hi Sorry if this has been asked before I couldn't find it any where. I'm trying to understand how Space Invaders works on the Atari 2600. It has two player object that it can repeat - which gives us the 6 Aliens in a row. 2 * 3 and you can show 2 of three by varying the space and only repeating it once. But how do they explode without flicker? I can't see how that isn't three different player objects in a row. When I look at it in debug is shows one of the player objects changing in the same horizontal position. So it is an alien and further down on the same line it's an explosion.

Hi I made a video on Atari 2600 cartridge and label designs and variations. I thought some folk here might like it - it's quite long. Anywho here's a link if you are interested. Atari 2600 Cart and Label Design Variations