I don't know if this is a serious post by the topic creator, but it could be - to someone with no real knowledge of consoles or computing then it might seem like a legitimite question to ask, especially if the topic creator knows that PCs can be upgraded to run newer games, but he knows nothing of the actual technicalities, or the conceptual differences between a console and a PC.
Anyway, Andytjuh, there is no way to do as you ask, as the 360 is not only entriely different in every practial way to the XBox 1 (different CPU, GPU, RAM speed, etc), but the 360 is much more powerful than the XBox 1, so all the clever programming in the world couldn't simulate a 360 on the XBox 1.
I suppose a skilled hardware person could take a 360, rip it's insides out, and put them in an XBox 1's case. I know that's nothing like what you are asking, but it's the only way you'll ever be able to run XBox 360 games on an XBox 1.
QUOTE(robot3 @ Jul 11 2011, 01:20 AM)
Actually sort of related, I was always wondering and this is all hypothetical of course, but in the early days of the 360 were any games made for it that technically could have run on a regular xbox? Like in the sense of if they programmed whatever game for the xbox instead of using 360 code (and without adding/ downgrading any graphics and such), that the regular xbox would have been able to run it? As with any system it can take a bit before the games are made to take advantage of said system, but in the early days of the 360, I really wonder how many games (if any) could have really just been a regular xbox game but wrapped in the 360 container?
Not strictly speaking, as the game's code would have to be written in whatever code the PowerPC CPU in the 360 uses, and not the x86 code that the XBox (and PCs, by the way) use. Also, the graphical hardware is very different, so the code for the XBox 1's GPU (graphical processing unit) would be very different from the code needed to achieve equivalent effects on the 360.
Theroretically, a game written for the XBox 1 could be modifed and recompiled for the 360, assuming the full source code is available (and well commented!), though I imagine the changes needed for the audio/visual hardware would be cumbersome, especially if the graphical output is drastically improved from XBox ability to the 360's potential ability. I don't know if this was done for any game, though it is concevable that quite a few games began life aimed at the XBox 1, and were instead moved to the 360 with whatever changes were necessary.