A leak document has been floating around the Internet detailing the inner workings of Windows Phone 7. The OS is described as a 32-bit operating system with “a dual layer architecture comprised of a kernel layer and a user layer.” According to BGR, “Application processes are given up to 1GB of virtual memory with a total of 2GB of memory allocated to processes. 2GB is given to the kernel. Microsoft will supply the 2D graphics and DirectX 10-based Direct3D 11 runtimes while OEMs, not Microsoft, will develop and distribute the drivers for both the 2D and 3D graphics. Support for Bluetooth 2.1 is included, but apparently support for 3.0 and 4.0 is not.”

Windows Phone 7 also promises OTA updates, so anything that is missing at launch–including Bluetooth 3.0 and 4.0 support–may be pushed out as a software update.

Additionally, Windows Phone 7 will employ two different file systems, depending if it’s a system file or a user file. IMGFS is used for system files and TexFAT will be employed for user files, which can be stored on removable memory or on the internal. Moreover, if a storage card containing “key files” is removed, erased, or missing, “the phone will be rendered useless and will be available for emergency calls only.” Whether this is a security feature of the phone or a an un-ironed glitch is not known at this time.

For graphics, the leaked documentation states: “For 3D graphics using Windows OS 7 Phone standard Direct3D 11. In previous versions of Windows Mobile was a mobile version of Direct3D. The new Direct3D 11 is based on DirectX10.”

Updates can also be deployed through the Zune program on the desktop should users not wish to perform an OTA upgrade. Windows Live ID will be neededfor synchronization and Marketplace purchases, much like a Google Gmail account is required for optimal Android use.

Carriers can make few changes to the platform. The bootscreen, wallpapers, and ringtones are some of the elements that can be changed. Carriers can also change the default search engine–which is Bing–within Internet Explorer Mobile. No trialware–thankfully!–can be preloaded on the device and carriers can customize their device experience with additional apps, which must first be approved by Microsoft and the number of apps is limited to 6 and total memory for pre-loaded carrier apps is limited to 60 MB.

(via: BGR)