Windows Phone 7 Architecture Leaked

Tweakers.net has come across a leaked document that apparently shows a bit of how Windows Phone 7’s architecture is supposed to function.

Here’s what we learned from it in a nutshell:

Windows Phone 7 is 32bit and will consist of a User Layer and a Kernel
Application processes can use up to 1GB of virtual memory and in total all processes are given up to 2GBs to use
Another 2GBs is given to the kernel itself
Microsoft provides the 2D and DirectX Direct3D runtimes but manufacturers have to supply the 2D and 3D drivers themselves
Phone 7 will use two different file systems, IMGFS for system files and TexFAT for user files
Unlike Android, the memory card and internal storage will be treat as one and the same
All updates (regardless of whether they are coming from carrier etc) will be sent through Microsoft’s update system (OTA or through Zune software)
Just like the iPhone, Microsoft tightly integrated their own Windows Live ID (like your iTunes ID) into the phone. This includes the Marketplace, where you need a Live ID to access and download apps (and is the only way to get apps on the devices).
Microsoft created a Genuine Windows Phone  Certificate that will be required on the device to use things like data synchronization

Manufacturers and carriers can only change the following:

Add custom tiles to the homescreen (cannot remove Microsoft’s tiles)
Boot screen is allowed to be changed
Default search engine can be changed in Internet Explorer
They can add custom apps to the phone, but only up to 6 and they have to take up less than 60MBs. They also must be approved by Microsoft and trial apps are not allowed

Source

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