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Emulator for ARM-powered Windows devices
- Prism is an emulator for ARM-powered Windows devices that translates the underlying code of software built for traditional x86-64 binaries used by Intel and AMD chips.
www.windowscentral.com/software-apps/what-is-microsoft-prismWhat is Microsoft's Prism? Explaining the emulation engine ...
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May 24, 2024 · Prism is an emulator for ARM-powered Windows devices that translates the underlying code of software built for traditional x86-64 binaries used by Intel and AMD chips.
- Overview
- WOW64 APIs
- Updating to support an Arm64 version of your app
Emulation for x86 apps makes the rich ecosystem of Win32 apps available on Arm. This provides the user the magical experience of running an existing x86 win32 app without any modifications to the app.
Arm versions of Windows 10 include emulation technology that enables existing unmodified x86 apps to run on Arm devices. Windows 11 extends that emulation to run unmodified x64 Windows apps on Arm-powered devices.
An x86 (or x64) app doesn’t even know that it is running on a Windows on Arm PC, unless it calls specific APIs (IsWoW64Process2).
The WOW64 layer of Windows allows x86 code to run on the Arm64 version of Windows. x86 emulation works by compiling blocks of x86 instructions into Arm64 instructions with optimizations to improve performance. A service caches these translated blocks of code to reduce the overhead of instruction translation and allow for optimization when the code runs again. The caches are produced for each module so that other apps can make use of them on first launch.
While the ability to emulate x64 and x86 on Arm devices is a great step forward, your app may be able to take advantage of native performance gains and the unique qualities of Arm64-powered devices by updating to support an Arm64 version of the app.
See Add Arm support to your Windows app for guidance on how to create an Arm64 version of your apps and what sort of advantages, challenges, and tooling may be involved, as well as available support for creating an Arm64 version of your app (and any related dependencies).
May 29, 2024 · Microsoft announced a new emulation layer called Prism on Windows 11 which can run x86 apps on ARM hardware with better performance and efficiency. The new Prism translation layer also works for many Windows games and translates x86 binaries on the fly.
- Senior Writer
- January 15, 1994
Jul 18, 2024 · Windows 11. How Well Does Windows on Arm's Prism Emulation Work? We Tested With 31 Apps. We installed a bushel of x86 Windows programs on a new Snapdragon X Elite laptop to see if Microsoft’s...
Jun 30, 2024 · The new x86-64 emulator is called Prism, and it’s now available. With a variety of Copilot Plus PCs sporting the new Snapdragon X processor now on the market, we thought we’d take a...
Jun 26, 2024 · Microsoft claims Prism is as efficient as Apple’s Rosetta 2 translation layer and can emulate apps twice as fast as the previous generation of Windows on Arm devices.
May 28, 2024 · The goal is to offer good enough performance when running software designed for other processor types so that it doesn’t negatively impact our experience. Microsoft claims that Prism performs similarly to Rosetta 2, Apple’s famous translation software for running programs on new processor types.
