These claims that XBox emulation is "hard" are ludicrous. It just takes a VM running in an OS shell. The x86 has a very specific architecture designed for a IBM-compatible motherboard with very regular addressing modes and a standard BIOS (which won't differ markedly from a PC's BIOS). Intel only has one technology for this after all, and while it's theoretically possible to come up with an alternative design that's not what Microsoft did... the window between conception of the device and was too small for them to have come up with something original, and Microsoft is a firm believer in not reinventing the wheel besides. XBox games were compiled with straight up Visual C that was agnostic of any special instructions outside of SSE and MMX. That was one of the selling points of the system to devs from the very beginning, that games could be made for XBox and the PC with the same team, only compile with a different library and you've got a version of your PC game for the XBox. Only reason it's a custom Celeron was to cut costs and reduce power consumption (Pentium 3s are hogs in comparison). So it's got a low level access video card. Well guess what: all video cards have those controls, you simply don't necessarily get access to them through DirectX because it manages them for you at the direction of the driver. But when you do low level you are making your own driver and not loading the one DirectX would like to use... make sense? The OS is probably WinNT with DirectX stripped out, in essence more like DOS than Windows. Windows Embedded, I think is what they call it. That emulator developers can't be certain they will not immediately get perfect accuracy is no reason not to try (doubtless they haven't). But I don't blame authors for not wanting to emulate it besides... MS is much scarier than Nintendo or Sony. Emu authors probably think that they have more legal leeway trying to get the emulation perfect than simply trying to get games to run, because they naively think the "nobility" of "preserving aging hardware" bestows on them a kind of legal immunity. I'll guarantee MS don't give a damn about none of dat.