Pyschonauts Now Back-Compat on 360
The much requested addition of backwards compatability for Psychonauts has reached the Xbox 360, reports the British Gaming Blog. The list also adds support for titles like Ultimate Spider-Man, Buffy, Shenmue II and ... Aquaman. The list was dropped early, so don't put the discs in quite yet and expect them to work. Still ... yay Psychonauts.
PC games write to hardware registers only through drivers, which are shipped as part of an operating system and can be replaced along with the operating system. Console games, on the other hand, ship the drivers with the game and often ship a game with drivers customized specifically for that game, often taking advantage of imperfectly understood quirks of the hardware. In addition, unlike old PCs and new PCs, the Xbox and Xbox 360 consoles have different CPU architectures, and the Xbox 360 needs an emulator, in effect the opposite of Rosetta, in order to execute Xbox games' Intel instructions on a PowerPC architecture.
Wii's backward compatibility is a result of the hardware upgrade being as transparent as that from Game Boy to Game Boy Color or from PC to PC/XT to PC/AT to what we have now. Other systems with backward compatibility (Sega Genesis, PlayStation 2, Game Boy Advance, Nintendo DS, PLAYSTATION 3) just include the previous generation console's CPU and a subset of its I/O hardware in order to run its games, which hardware may (Gen, PS2, DS) or may not (GBA, PS3) be used for some tasks in titles for the new platform. Microsoft could not do either in Xbox 360 due to contractual disputes with Intel and NVIDIA.