- Sdrawkcab Eman
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I'll explain why this happens a bit more. Orignal XBox games are only designed to work on the orignal XBox's hardware. The emulator software on the 360 is used to let orignal XBox games think that it's running on an XBox. The emulator doesn't work perfectly, though, which is what causes the graphical glitches. It also takes a lot more processing power for it to work. That's why XBox games run slightly faster on an XBox than a 360.
Sony did this a different way. Every PS2 also has a PS1 in it. Every PS3 has a PS2 and a PS1 in it. There's no emulation problems, but it makes it more expensive. As they keep making newer ones, they'll have to have more and more hardware in it too, unless they only become backwards compatible with only the last two or three consoles. With software emulation, there's no limit to how far back you could go.
PC's do this a different way. Video cards, sound cards, game controllers, etc. are all designed to work with both DirectX and Open GL. Then games just have to use DirectX or Open GL.
[Edited on 06.07.2007 8:06 PM PDT]