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As far as I know, they don't emulate Xbox 360 games on Xbox One, they port and compile it for the new console, creating entirely new binaries. Not much emulatio

by Kenji 9y ago

As far as I know, they don't emulate Xbox 360 games on Xbox One, they port and compile it for the new console, creating entirely new binaries. Not much emulation going on there. Correct me if I'm wrong. EDIT: https://en.wikipedia.org/wiki/List_of_Xbox_360_games_compatible_with_Xbox_One https://en.wikipedia.org/wiki/List_of_Xbox_360_games_compati... "Unlike the emulation of original Xbox games on the Xbox 360, the Xbox One does not require game modification, since it emulates an exact replica of its predecessor's environment – both hardware and software operating systems." I stand corrected.

ceejayoz 9y ago
http://support.xbox.com/en-US/games/game-setup/play-xbox-360-games-on-xbox-one http://support.xbox.com/en-US/games/game-setup/play-xbox-360... > Xbox 360 games run within an emulator on Xbox One, which means you'll be able to use most features from both systems while playing games, such as screenshots, broadcasting, and Game DVR.
satysin 9y ago
It uses emulation. While it is true the user needs to download a 'game image' rather than play the game directly from disc this is because that image is a virtual hard disk that contains the game and a customised Xbox 360 virtual machine that has tweaks for the game. It is similar to PC console emulators that have specific configs for certain games.
- sjmulder 9y ago
  I thought they do a static recompilation too, from the original binary, but I can't look it up now.
  - monocasa 9y ago
    That's actually probably the case. Xbox 360 banned making arbitrary pages executable (not even the Kernel could do it, the Hypervisor call to mark a page as executable had to come with the signatures signed by Microsoft's private key). So they probably can get away with static recompilation.
Kipters 9y ago
AFAIK you're right, developers have to upload a separate build for Xbox One-compatible games
- _asummers 9y ago
  Which is why they're slowly trickling them out a few at a time (though there's some gems in there!).
gcb0 9y ago
from your quote, it's probably neither. looks like api translation like wine does. ...which is rather easy if you wrote the original api.
- AgentME 9y ago
  The Xbox 360 used the PowerPC cpu architecture, and the Xbone is x86, so there has to be emulation or recompilation involved.

by Kenji 9y ago

ceejayoz 9y ago

http://support.xbox.com/en-US/games/game-setup/play-xbox-360-games-on-xbox-one http://support.xbox.com/en-US/games/game-setup/play-xbox-360... > Xbox 360 games run within an emulator on Xbox One, which means you'll be able to use most features from both systems while playing games, such as screenshots, broadcasting, and Game DVR.

satysin 9y ago

It uses emulation. While it is true the user needs to download a 'game image' rather than play the game directly from disc this is because that image is a virtual hard disk that contains the game and a customised Xbox 360 virtual machine that has tweaks for the game. It is similar to PC console emulators that have specific configs for certain games.

sjmulder 9y ago
I thought they do a static recompilation too, from the original binary, but I can't look it up now.
- monocasa 9y ago
  That's actually probably the case. Xbox 360 banned making arbitrary pages executable (not even the Kernel could do it, the Hypervisor call to mark a page as executable had to come with the signatures signed by Microsoft's private key). So they probably can get away with static recompilation.

Kipters 9y ago

AFAIK you're right, developers have to upload a separate build for Xbox One-compatible games

_asummers 9y ago
Which is why they're slowly trickling them out a few at a time (though there's some gems in there!).

gcb0 9y ago

from your quote, it's probably neither. looks like api translation like wine does. ...which is rather easy if you wrote the original api.

AgentME 9y ago
The Xbox 360 used the PowerPC cpu architecture, and the Xbone is x86, so there has to be emulation or recompilation involved.