Print 16 comment(s) - last by drycrust3.. on Apr 25 at 2:41 AM

  (Source: Microsoft)

A peek at the Windows Phone 7's memory model, which allocates 2 GB to the kernel and 2 GB to apps.  (Source:
Microsoft is hard at work crafting its response to Apple, RIM, and Google

This week, details about both the Windows Phone 7 architecture and low-end phone hardware for developing nations was aired.

Microsoft faces much the same position as Palm does in the smartphone market -- it's losing marketshare to a charging Google and is falling farther away from entrenched market leaders Apple and Research in Motion.

Microsoft's answer is a complete reboot of its smartphone franchise, however, some are skeptical.  The initial implementation of Microsoft's new operating system -- Windows Phone 7 -- reportedly will lack many features that competitors have, such as support for multi-tasking and copy/paste.  Still, many are intrigued to see what the new design will bring. received leaked slides showing the architecture of the new smartphone OS.  The OS is a 32-bit operating system.  Under the memory model, application processes get up to 2 GB of memory, 1 GB of which is virtual memory.  The kernel, likewise, gets its own 2 GB of memory space.

The mandated processor will be an ARMv7 design.  Multi-touch, FM Tuner, Wi-Fi, GPS, and camera are also mandated.  The default screen resolution is 800x480 pixels, but developers can go as low as 480x320 (the resolution of the current iPhone).

Microsoft is providing OEMs with 2D graphics and DirectX 10-based Direct3D 11 runtimes, while they will be responsible for providing drivers for their graphics hardware.  

Bluetooth 3.0 and 4.0 support is noticeably absent, though the phone will support the widespread Bluetooth 2.1 standard.  Microsoft hopefully plans an update at some point to add support for later versions of the wireless communication standard, but there's no specific details at this point.

Interestingly the OS utilizes two different file systems -- TexFAT for user files or IMGFS for system files.  There's talk about putting the phone in a mostly disabled state if key system files are deleted.

More interestingly the slides indicate that Microsoft is planning memory card support.  Previously, at developers events, several sources were told by Microsoft executives that memory cards were confusing to users and that it was omitting them to "simplify" the design.  At this point its unclear whether memory card support is in, out, or coming soon.

Microsoft has strict rules with OEMs when it comes to software.  Bing is the default search engine for the phone -- that cannot be changed.  OEMs can change the default search engine within Internet Explorer, though.  Likewise, the home screen tiles are non-negotiable.  However, OEMs can add their own extra tiles to the home screen.  Finally, trial apps are disallowed and OEMs are only allowed to add 6 apps and not use more than 60 MB of storage space.

In separate Windows Phone 7 news, Sudeep Bharati, who works on Microsoft India’s Visual Studio team, says that a special fourth chassis will be added for phone sold in developing nations.  He describes, "The low-cost version of the phone will have a different chassis than version 1 to be launched by 2010 end."

While he mentioned that it would be "low-cost" -- perfect for developing countries like India or China -- he did not mentioning anything about cutting the minimum hardware requirements, raising questions about how Microsoft will be cutting costs on the developing nations-targeting handset.

Three chassis designs were previously announced for the U.S. models, including the wide design (similar to the Zune), a slide out keyboard version, and a third, unannounced, chassis.  The third chassis has been speculated by some to be a candy bar or slider design.

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You can't change the home screen tiles?
By dubldwn on 4/20/2010 12:06:22 PM , Rating: 2
So, you have to have the outlook, narcissistic "me", and tacky xbox live tiles? No.

RE: You can't change the home screen tiles?
By Goty on 4/20/2010 12:32:01 PM , Rating: 2
This just means you'll have to wait for the Windows 7 Phone version of Jailbreaking.

RE: You can't change the home screen tiles?
By wifiwolf on 4/20/2010 5:14:37 PM , Rating: 2
And we should hope it's something worth jailbreaking.
Then we'll start using the almost forbidden words... on smartphones:

But is it worth jailbreaking?

By Shin Messiah on 4/20/2010 11:52:50 PM , Rating: 3
Greetings to all. First time posting but have been watching the antics on here for a very long time...

@wifiwolf... it should be worth "jail breaking" but the term jail breaking is usually referenced to Apple products...for Windows phone products its referred to as HardSPL Unlocking (for the most part), and Android phones use the term "Rooting". Anyways Windows phones have long had great communities ( and to develop, unlock, fix, tweak every Windows phone that has ever come out. The devs in these communities number into the thousands. With every Windows Mobile phones I've had, through use of these communities, I have been able to fully tweak, fix or customize my phone. Out of the box they arent that great for power users like the most of us. These commnuties are hard at work now doing research and getting ready to shift focus to the new os once it comes out. It might take a couple days from the first release, but theres no doubt in my mind they will crack this OS wide open, enhance it features, and give us some back some the features MS withheld from us. They do it every time, and there is no doubt in my mind they will do it again.

Of course I will still wait until after all that smokes clears before making the jump...because as much as MS is following in Apples footsteps weening its new mobile OS, they might be as stupid as Apple as to start bricking phones once the first wave of people start unlocking them.

By damianrobertjones on 4/20/2010 12:32:29 PM , Rating: 2
Of course you'll be able to change whatever you like, within, say, 45 seconds after it's initial release (and probably weeks before).

By spread on 4/20/2010 12:33:39 PM , Rating: 3
narcissistic "me"

That means Windows Phone 7 is going to be a major success!!

By Smilin on 4/20/2010 2:10:15 PM , Rating: 5
Aw man, MSFT *just* missed a sale with you didn't they? You were going to buy one before you heard about the "me" tile. I just know it.

RE: You can't change the home screen tiles?
By HighWing on 4/20/2010 3:47:49 PM , Rating: 4
Actually it only said that manufactures can not change the tiles. Which I take to mean that the user might still be able to after they buy it.

By Suntan on 4/20/2010 4:51:54 PM , Rating: 3

Looking at how some of the carriers have F'ed up phones in the past with junk, I see this as a good thing. (Assuming the customer can change it as desired.)


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