The more I understand of how 7800 graphics work, the more I think that this machine is incredible, and Tramiel should burn in hell - if released when it was ready, I think it would eat NES for the breakfast, and SMS for dinner. One thing is strange, however. Are you trying to tell me, that a system which could possibly display 100 objects on the screen, has the same sound capabilities as 2600? 2 channels? With that lousy limited pitch? Can something be done with this? I'm a bit surprised (and it isn't nice surprise). I have one more question, if I can: how does MARIA handle collision detection? Do I have to do this in software way? Maciej