Category Archives: microsoft

apple, asus, google, microsoft, open source, professional

Half-baked Android tablets will help Apple, give hope to Microsoft

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The downside of open is fragmentation. CES earlier this month was overflowing with Android tablets and smartphones, but since anyone can use Android, device manufacturers may disappoint users, for example by shipping tablets that do not use a version of Android designed for tablets, or shipping devices that do not have access to the official Android Market.

The Inquirer reported yesterday that the Asus tablets announced at CES will not in fact ship with Android 3.0 Honeycomb. The reason stated is that:

because the company did not know the detailed technical specifications requirements of the Android 3.0 Honeycomb operating system, it could not confirm that Honeycomb will be the tablets’ OS.

Although it is stated that the tablets will ship with Android 2.3 Gingerbread, I get the impression that Asus might upgrade them to Honeycomb eventually; and since they are now apparently not due until the third quarter there is time for plans to change.

Not all Android devices have Google’s official compatibility blessing.  The frequently asked questions make a good read:

Anyone is welcome to use the Android source code, but if the device isn’t compatible, it’s not considered part of the Android ecosystem.

Only devices that have passed Google’s compatibility tests get access to the Android Market. This leads to a surprising situation for users: you might buy an Android tablet or smartphone and find that it has no access to the Android Market.

Vendors can get round this to some extent by creating their own Android app stores, though this kind of fragmentation is likely to have a bad outcome, with a limited selection of apps and insufficient market share to attract developer attention.

This means that a handy question to ask a salesman is: does this gadget have the Android Market? If the answer is anything less than a demo of the official Google Android Market client, that is reason for caution.

The context is that all these devices have to compete with Apple; and the App Store is a significant part of the appeal of iOS devices. Therefore an Android device without access to the Android Market is disadvantaged, though it is not something you are likely to find mentioned on the box.

There is an obvious danger for Android, that customers confronted with a vast range of Android offerings will find it hard to distinguish between what is excellent, what is reasonable, and horrible implementations like the Next Tablet.

Even the element of uncertainty is enough to help Apple, which is likely to announce a second generation iPad soon. It may even give hope to Microsoft, depending on when “Windows 8” tablets come to market and how good they prove to be.

The challenge for Google is how to keep Android open, while also preventing its brand from being damaged by too many sub-standard devices.

.net, development, javascript, microsoft, professional, software development, visual studio

Visual Studio 2010 nine months on: how good has it proved?

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Visual Studio 2010 was released on April 12th 2010. Nine months on, how good has it proved to be?

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I researched deeply into Visual Studio 2010 at the time, and was impressed overall. It was a huge release, partly because the IDE was rebuilt using Windows Presentation Foundation, and partly because of a large number of new features including the F# language. Performance was always going to be an issue with the move to a .NET-based IDE, but on my machines I found it satisfactory.

Others have been less pleased with the performance. The comments to Jason Zander’s announcement of the Service Pack 1 beta last month make interesting reading. Here is the negative:

I am a professional .NET developer and I am really upset with VS 2010. It crashes more often than VS 2008. It is slow as hell. It even crashes when debugging. VS 2010 is built with WPF which is causing all these problems.

and here is the positive:

I don’t know what y’all complaining about – VS2010 is blazingly fast… at least on my machine.

I am not sure whether the performance issues are more dependent on the the type of work you are doing, or the size of the projects, or some other factor. One issue may be graphics performance, since this will make a big difference to WPF whereas not so much with Visual Studio 2008 and earlier.

Thinking back to this time last year, I also recall how Visual Studio 2010 seems so focused on .NET, including Silverlight. Later on we got the announcement of Visual Studio LightSwitch, a RAD database application tool which builds Silverlight clients. It now seems obvious, especially following the PDC (Professional Developers) conference in November, that the vision of the developer team at Microsoft did not align with the vision of the Windows team; and that the Windows team seemed to win that argument internally. It is odd, because Silverlight has the potential to solve problems for the company. It is a technology that extends from the desktop to Windows Phone 7, which is well-suited to app store deployment thanks to the way apps are isolated, and which potentially can run on multiple platforms. Now with Silverlight 5, promised for release this year, Microsoft is adding more Windows-specific features and allowing more fragmentation between versions. Silverlight on Windows Phone 7 is based on version 3, the Mac version has more limited capabilities than the Windows version, and so on.

Microsoft said at PDC that “HTML 5” is its broad-reach platform. That suggests that what Visual Studio needs is HTML 5 designers and JavaScript libraries that integrate with Microsoft’s server technologies and which make it easier to develop HTML application for multiple form factors including small devices.

It is a confusing story, and I would love to know if the subject came up in CEO Steve Ballmer’s discussions with Bob Muglia, VP of Server and Tools, recently. The outcome of those discussions is that Muglia will be leaving Microsoft in the summer.

We will have to wait for Visual Studio 2012, maybe, to discover any change in its direction. In the meantime, SP1 adds a new help viewer, in response to many complaints, as well as a few new features for testing and debugging. There is also a list of bug-fixes, some of which look significant:

and so on. Let me add that while the list looks bad, it is no more than you would expect for a tool of this complexity and in my own testing Visual Studio 2010 has worked well.

I agree though with some of the commenters who note that Microsoft is slow to react when bugs are reported. It will be more than a year after the initial release when SP1 is finished, though you can use the beta for production code if you dare.

I would be interested in hearing from users of Visual Studio 2010. How are you finding it, or did you try it and go back to Visual Studio 2008? I realise that adoption of a new IDE for production work tends to be slow, because developers are reluctant to switch mid-project.

google, java, microsoft, open source, professional, web authoring

Google flexes its Chrome browser muscles, removes support for H.264 video – but what about Adobe Flash?

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Google has announced that it will remove support for the H.264 video codec in its Chrome browser:

…we are changing Chrome’s HTML5 <video> support to make it consistent with the codecs already supported by the open Chromium project. Specifically, we are supporting the WebM (VP8) and Theora video codecs, and will consider adding support for other high-quality open codecs in the future. Though H.264 plays an important role in video, as our goal is to enable open innovation, support for the codec will be removed and our resources directed towards completely open codec technologies.

The reason given is that Google wishes to support open standards. That sounds good for open standards, but not so good for users who simply want a video to play.

Google’s position contrasts that of Microsoft with IE9:

In its HTML5 support, IE9 will support playback of H.264 video as well as VP8 video when the user has installed a VP8 codec on Windows

Still, at least IE9 will play VP8 if the codec is installed, so that makes VP8 look a better option for content providers – which is the outcome Google is hoping for.

I have mixed feelings about this approach, because while it is good for open standards it is bad for compatibility. I am also not sure that it is consistent. Google announced in June that it is integrating Adobe Flash support into the browser; yet Flash is not an open standard.

That also suggests that H.264 video will still play in Chrome, provided it is in a Flash wrapper.

Maybe Google is learning from Apple how to deprecate technologies by removing support. Apple refuses to allow Java or Flash on iOS, and has stopped doing its own build of Java for OS X. Apple has also stated that these “optional” components may not be used in apps that are deployed in the Mac App Store, thus making a disincentive for developers considering those runtimes.

Apple has not squashed Flash though; and Google may find it equally hard to squash H.264, which is widely supported throughout the industry, has the best tools, and for which hardware is optimised. Apple supports H.264 but is unlikely to support WebM or Theora any time soon. Here’s what Apple CEO Steve Jobs said in April 2010:

To achieve long battery life when playing video, mobile devices must decode the video in hardware; decoding it in software uses too much power. Many of the chips used in modern mobile devices contain a decoder called H.264 – an industry standard that is used in every Blu-ray DVD player and has been adopted by Apple, Google (YouTube), Vimeo, Netflix and many other companies.

Although Flash has recently added support for H.264, the video on almost all Flash websites currently requires an older generation decoder that is not implemented in mobile chips and must be run in software. The difference is striking: on an iPhone, for example, H.264 videos play for up to 10 hours, while videos decoded in software play for less than 5 hours before the battery is fully drained.

When websites re-encode their videos using H.264, they can offer them without using Flash at all. They play perfectly in browsers like Apple’s Safari and Google’s Chrome without any plugins whatsoever, and look great on iPhones, iPods and iPads.

It seems Jobs spoke too soon when he said H.264 would play perfectly in Chrome.

Post updated to add Apple quote

microsoft, professional, sharepoint

How Microsoft SharePoint makes simple things hard

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When I was asked how to show file extensions in lists of documents on SharePoint sites I thought it would be a simple change to make. I did a quick Google and found several answers; but some of them involved editing core files that instinctively I thought should be left alone. I took a closer look and worked out the steps.

It turns out that you need SharePoint designer, plus you have to convert a web part to XSLT, and then figure out what to change in the rather complex page that is then generated.

A few observations.

First, I am surprised that Microsoft did not build in some easy way of showing the file extensions in a document library, which seems an obvious thing to want to do. There are hundreds of much more obscure things you can easily show, but not this one.

Second, it is nice that Microsoft has made its SharePoint Designer tool free, but I am not sure that the way it is presented is quite right. It is a techie product but I did not find Help particularly helpful. You know the kind of thing; you are in the Formula Editor, you hit F1, and you get a description of the dialog, when what you want of course is a reference to the formulae.

Third, when I did find the documentation I found it obscure. Here’s the reference for the @LinkFileName formula:

Returns a GUID that represents the icon that is used to create a link to a file in a document library, where the file can be edited by using a menu.

Hmm. I am not sure how many fat SharePoint books you need to read to understand why this particular formula is used as it is in SharePoint, or why String(@LinkFileName) returns the file name with its extension.

Fourth, I discovered that SharePoint deliberately hides the file extension. You can show the extension by removing the function that strips it off, in the formula that determines the contents of that cell.

Now I know why SharePoint is such good business for specialists.

.net, cloud computing, microsoft, professional, silverlight, software development, windows

Bob Muglia leaving Microsoft, CEO Steve Ballmer searching for new cloud leadership

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Microsoft has announced that Bob Muglia, President of Server and Tools, is leaving Microsoft.

In his memo, Steve Ballmer says:

Bob Muglia and I have been talking about the overall business and what is needed to accelerate our growth. In this context, I have decided that now is the time to put new leadership in place for STB. This is simply recognition that all businesses go through cycles and need new and different talent to manage through those cycles.

It is always hard to tell from the outside, but in my encounters Muglia has been among the most articulate and confident of Microsoft’s top executives. I have also noticed in my regular look at Microsoft’s financials that the Server and Tools business has performed consistently well for as long as I can remember.

Most recently, Muglia took over the Azure business and seemed to know where he was going with it. He is also responsible for developer tools, and while his remarks about Silverlight at Microsoft’s PDC in November were disappointing to developers on that platform, they showed a clear sense of direction.

In this context, it seems surprising that Ballmer is in search of “new and different talent”. It does sound as if Ballmer and Muglia do not see the future of the cloud business – which is the focus of the memo – in the same way.

The key question: in what way did Ballmer and Muglia’s vision differ? I guess we will get some more clues as today’s news is discussed.

Update: Mary Jo Foley has posted Bob Muglia’s internal email to his team:

Later this year, I’m moving on to new opportunities outside of Microsoft, so I wanted to take a few minutes to share with you what’s important to me in life and leadership.

The foundation of who I am is based on living with integrity. Integrity requires principles, and my primary principle is to focus on doing the right thing, as best I can. The best thing, to the best of my ability, for our customers, our products, our shareholders, and of course, our people.

Just sugar, or did Muglia feel that staying at Microsoft would compromise those principles?

Since the announcement, the reaction across the industry has shown the high regard in which he is held, and bewilderment at why he is being let go. Here’s Redmonk analyst James Governor on Twitter:

Another exit: Microsoft server chief Muglia leaving company normally i say so what but this is TERRIBLE for microsoft

apple, microsoft, professional, software, software development, vista, windows

Apple’s Mac App Store – and the forgotten Windows Marketplace

Apple launched the Mac App Store yesterday and I had a look this morning. It is only available to users of Mac OS X Snow Leopard, where it comes with the latest system update.

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It is interesting that Apple has not used iTunes for the App Store, but has developed new client software. Maybe it is coming round to opinion that iTunes has become bloated; it is only for historic reasons that a music player has become an all-purpose app installer.

The store itself worked well for me. I picked a free app, TextWrangler, and signed in with my Apple ID. The UI showed Installing, then Installed, and I was done.

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The TextWrangler icon appeared in the Dock so I could start the app easily.

What counts is what I did not have to do – reboot, select from setup options, or deal with perplexing error messages.

Users will also like the common-sense licensing, which lets you download and install a purchased app on any Mac you use, controlled by your App Store log-in. I am not sure what happens if you install your app on your friend’s Mac, then sign out of the App Store. There is some link between the app and your Apple ID, because if you copy the application to another Mac it will ask for your sign-in details when you first run it, but I am not clear whether this is checked on every run to deter piracy.

Most important, there is an attractive range of apps at good prices. In the UK, Angry Birds is £2.99, Pinball HD £1.79, and Apple Pages or Keynote £11.99 each. That is less than typical Apple Store shrink-wrap prices. The prices for Pages and Keynote makes the price Microsoft charges for Office look impossibly expensive. Good for customers; but worrying for independent software vendors who want to make a living.

Developers pay $99.00 per year to join the Mac Developer Program and then 30% commission to Apple on every sale. Of course, like the iPhone App Store, apps are subject to Apple’s approval.

Lest you think it is clever of Apple to invent an app store for the desktop, it is worth noting that the concept is an old one. Linux has delivered free software like this for years, and some distributions have also featured paid app installers integrated into the OS.

So has Microsoft, which has run various varieties of Windows Marketplace over the years, for mobile and desktop applications. Windows Vista shipped with an app store for both Microsoft and third-party apps built-in. It was on the Start menu:

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as well as in Control Panel:

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On November 1st 2008 Microsoft shut down Windows Marketplace and “transitioned” it to a referral site. There was some angst at the time about the closing of the digital locker, which proved insecure against the threat of corporate mind-changing. It still runs the online Microsoft Store, but this is for Microsoft-only products. For example, you can download Microsoft Songsmith for £25.00:

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Why did Windows Marketplace fail? Well, the user experience was poor, it was insufficiently prominent in the Vista user interface, setup could be troublesome. Major Windows app vendors figured out that they would be better off drawing potential customers to their own web sites, where they have full control. As is often the case, Microsoft was conflicted over whether it wanted to drive customers to the online store, or to partner retailers, or to app vendor sites; and the OEMs would have their say as well, when customising Windows for their own PCs.

Another factor is that Windows apps are often not well isolated. Silverlight actually solves this problem – out-of-browser apps are well isolated and secure – but Microsoft does not even ship Silverlight by default with Windows.

The indications are that Microsoft will have another go in Windows 8. Documents leaked last year show an app store. From my post at the time:

There’s a pattern here. Microsoft gets bright idea – Tablet, Windows Marketplace, Passport. Does half-baked implementation which flops. Apple or Google works out how to do it right. Microsoft copies them.

adobe, development, google, microsoft, mobile, windows, windows 7

NVIDIA Tegra 2: amazing mobile power that hints at the future of client computing

Smartphone power has made another jump forward with the announcement at CES in Las Vegas of new devices built on NVIDIA’s new Tegra 2 package – a System on a Chip (SoC) that includes dual-core CPU, GPU, and additional support for HD video encoding and decoding, audio, imaging, USB, PCIe and more:

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The CPU is the ARM Cortex-A9 which has a RISC (Reduced Instruction Set Computer) architecture and a 32-bit instruction set. It also supports the Thumb-2 instruction set which is actually 16-bit. How is 16-bit an upgrade over 32-bit? Well, 16-bit instructions means smaller code, even though it gets translated to 32-bit instructions at runtime:

For performance optimised code Thumb-2 technology uses 31 percent less memory to reduce system cost, while providing up to 38 percent higher performance than existing high density code, which can be used to prolong battery-life or to enrich the product feature set.

The GPU is an “ultra low power” (ULP) 8-core GeForce. In essence, the package aims for high performance with low power consumption, exactly what is wanted for mobile computing.

Power is also saved by sophisticated power management features. The package uses a combination of suspending parts of the system, gating the clock speed, screen management, and dynamically adjusting voltage and frequency, in order to save power. The result is a system which NVIDIA claims is 25-50 times more efficient than a typical PC.

According to NVIDIA, Tegra 2 enables web browsing up to two times faster than competitors such as the Qualcomm Snapdragon 8250 or Texas Instruments OMAP 3630 – though of course these companies also have new SoCs in preparation.

Tegra 2 is optimised for some specific software. One is the OpenGL graphics API. “The job of the GPU is to implement the logical pipeline defined by OpenGL”, I was told at an NVIDIA briefing.

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I asked whether this meant that Tegra 2 is sub-optimal for Microsoft’s Direct X API; but NVIDIA says it is sufficiently similar that it makes no difference.

Nevertheless, Tegra 2 has been designed with Android in mind, not Windows. There are a couple of reasons for this. The main one is that Android has all the momentum in the market; but apart from that, Microsoft partnered with Qualcomm for Windows Phone 7, which runs on Snapdragon, shutting out NVIDIA at the initial launch. NVIDIA is a long-term Microsoft partner and the shift from Windows Mobile to Android has apparently cost NVIDIA a lot of time. The shift took place around 18 months ago, when NVIDIA saw how the market was moving. That shift “cost us a year to a year and a half of products to market”, I was told – a delay which must include changes at every level from hardware optimisation, to designing the kind of package that suits the devices Android vendors want to build, to building up knowledge of Android in order to market effectively to hardware vendors.

Despite this focus, Microsoft demonstrated Windows 8 running on Tegra during Steve Ballmer’s keynote, so this should not be taken to mean that Windows or Windows CE will not run. I still found it interesting to hear this example of how deeply the industry has moved away from Microsoft’s mobile platform.

Microsoft should worry. NVIDIA foresees that “all of your computing needs are ultimately going to be surfaced through your mobile device”. Tegra 2 is a step along the way, since HDMI support is built-in, enabling high resolution displays. If you want to do desktop computing, you sit down at your desk, pop your mobile into a dock, and get on with your work or play using a large screen and a keyboard. It seems plausible to me.

During the press conference at CES we were shown an example of simultaneous rich graphic gaming on PC, PlayStation 3, and Tegra 2 Smartphone.

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Alongside Android, Tegra 2 is optimised for Adobe Flash. NVIDIA has been given full access to the source of the Flash player in order to deliver hardware acceleration.

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Actual devices

What about actual devices? Two that were shown at CES are the LG Optimus 2X:

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and the Motorola Atrix 4G:

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Both sport impressive specifications; though the Guardian’s Charles Arthur, who attended a briefing on the Atrix 4G, expresses some scepticism about whether HD video (which needs a large display) and the full desktop version of FireFox are really necessary on a phone. Apparently the claimed battery life is only 8 hours; some of us might be willing to sacrifice a degree of that capability for a longer battery life.

Still, while some manufacturers will get the balance between cost, features, size and battery life wrong, history tells that we will find good ways to use these all this new processing and graphics power, especially if we can get to the point where such a device, combined with cloud computing and a desktop dock, becomes the only client most of us need.

NVIDIA says that over 50 Android/Tegra 2 products are set to be released by mid-2011, in tablet as well as Smartphone form factors. I’m guessing that at least some of these will be winners.

.net, microsoft, mobile, professional, silverlight, software development, windows, windows 7, xbox

Steve Ballmer at CES: Microsoft pins mobile hopes on Windows 8

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Microsoft CEO Steve Ballmer gave the keynote at CES in Las Vegas last night. It was a polished performance and everything worked, but was short on vision or any immediate answer to the twin forces of Apple iPad and Google Android which are squeezing out Microsoft in the mobile world – smartphones and tablets – which currently forms the centre of attention in personal computing.

That said, CES stands for Consumer Electronics Show; and Ballmer did a good job showing off how well Kinect is performing, claiming sales of 8 million already. He showed more examples of controlling Xbox through speech and gesture, and said that Kinect is also boosting sales of the console; clearly it is now taking it beyond the hardcore market of first-person shooters.

We saw some fun new Windows devices, such as Acer’s dual-screen Iconia laptop.

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There was also a demonstration of the updated Microsoft Surface which now runs full Windows 7 and does not require hidden cameras, so that it can now be used in more scenarios, such as for interactive digital signage.

All well and good; but what about mobile? We got a Windows Phone 7 demo, but no sales figures, nor any mobile partners on stage; I’m guessing they are too busy promoting their new Android devices. Ballmer did say that the phone is coming on Verizon and Sprint in the first half of this year. Application availability is improving, but how will Microsoft win attention for its smartphone? My local high street is full of mobile phone shops, none of which even stock it as far as I can tell. There is a tie-in with Xbox Live which may help a little.

The problem though is that Microsoft does not seem to be wholeheartedly behind the Windows Phone 7 OS, which is based on Windows CE with a new GUI and Silverlight/XNA runtime for applications. Rather, Microsoft is signalling that full Windows is its future mobile operating system. At CES it announced Windows on ARM, the processor of choice in mobile, and during the keynote we saw the next version of Windows (though with the Windows 7 GUI) running on various ARM devices.

The power available in new System on a Chip packages like NVIDIA’s Tegra 2 leaves me in no doubt that full Windows could technically run on almost any size of device; but that does not make it the sensible choice for all form factors. Note also that while it was not mentioned at CES, NVIDIA has said that Tegra 2 is optimized for Android.

Microsoft could plausibly have released a tablet based on the Windows Phone 7 OS, which is built for touch control, this year. Instead, it will be at least 2012 before we see a Windows 8 tablet, and we are taking it on trust that this will really work nicely with touch and not need a stylus dangling at the side. By then Apple will, I presume, be releasing iPad generation 3.

Putting this in a developer context, what is Microsoft’s mobile development platform? Silverlight and XNA? The full Windows native API? Or HTML 5? Each of these is very different and it seems to me a muddled story.

microsoft, professional, windows

NVIDIA’s first CPU, Project Denver, aims to bring ARM to desktops and servers

At CES in Las Vegas today NVIDIA’s CEO Jen-Hsun Huang announced the company’s first CPU: Project Denver. This is a partnership with ARM, to create “a full custom processor” targeting “high performance computing – servers, PCs, super-computers, cloud computing.” NVIDIA will still licence ARM processors for mobile computing.

Since ARM has in the past focused on the mobile and embedded market, and NVIDIA on GPUs, it is a departure for both companies.

Why? Huang says it is because ARM is “the new standard microprocessor architecture.” Judging by this chart, shown at the press briefing, it is hard to disagree:

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In a few years, said Huang, “There will be more ARM processors shipped than all the x86 chips ever shipped.”

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NVIDIA’s press release explains that the purpose of Project Denver is to extend the range of ARM systems upwards:

For several years, makers of high-end computing platforms have had no choice about instruction-set architecture.  The only option was the x86 instruction set with variable-length instructions, a small register set, and other features that interfered with modern compiler optimizations, required a larger area for instruction decoding, and substantially reduced energy efficiency.

Denver provides a choice.   System builders can now choose a high-performance processor based on a RISC instruction set with modern features such as fixed-width instructions, predication, and a large general register file.   These features enable advanced compiler techniques and simplify implementation, ultimately leading to higher performance and a more energy-efficient processor.

The other interesting aspect of Project Denver is its integration with the GPU – as you would expect from NVIDIA:

An ARM processor coupled with an NVIDIA GPU represents the computing platform of the future.  A high-performance CPU with a standard instruction set will run the serial parts of applications and provide compatibility while a highly-parallel, highly-efficient GPU will run the parallel portions of programs.

While we tend to focus most on power efficiency for mobile devices, because we notice how long our batteries last, it is equally important for larger systems. Power consumption and dealing with heat is a key issue for datacentres, while in everyday desktop computing power consumption is a significant proportion of the running cost of an IT system.

Project Denver puts a different spin on Microsoft’s Windows-on-ARM announcement today. The assumption is that Microsoft has in mind a mobile future for Windows; but if Denver takes off it could be important on desktops and servers as well.

Before getting too excited, it is worth recalling how Intel’s Itanium, cruelly dubbed the Itanic, mostly failed in the market. That was partly thanks to design problems, and partly because the industry was too deeply hooked into x86 applications. I also recall Motorola’s doomed attempts to sell Windows NT on PowerPC in the mid Nineties.

Denver could fare better, thanks to the ubiquity of ARM in the mobile world. That said, much will depend on whether a Denver-based system really does offer significant benefits over whatever Intel and/or AMD will have come up with by the time it ships. If it is less than spectacular, Denver will be a hard sell.

.net, microsoft, mobile, multimedia, professional, silverlight, software development

Windows 8 will run on ARM processors – a natural home for Silverlight?

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Microsoft announced today at CES in Las Vegas that the next version of Windows will run on ARM as well as Intel CPUs. But why? The reason is that ARM CPUs have huge momentum in mobile computing, thanks to their low power consumption. Microsoft wants Windows to support System on a Chip (SoC) architectures such as NVIDIA’s Tegra 2, which has two ARM Cortex-A9 CPUs combined with an HD-capable graphics processor in a single package. In its press release, the company is careful not to upset established x86/x64 partners Intel and AMD too much, emphasising that Windows will run on SoC packages based on those CPUs as well.

It is an interesting announcement, but one that raises as many questions as answers. The first concerns Microsoft’s mobile strategy, with Windows now seeming to encroach on territory that you have thought belonged to its embedded operating system, Windows CE, which underlies both Windows Mobile and Windows Phone 7. With all its legacy APIs, full-blown Windows does not seem ideal for low-powered, resource-constrained mobile devices; yet the company seems set on bringing full Windows rather than something based on Windows Phone 7 to the emerging tablet market.

The second issue is that applications will need at least re-compiling, and in many cases some re-coding, in order to run on ARM CPUs. Microsoft says it will deliver Office for ARM:

Sinofsky: Microsoft Office is an important part of customers’ PC experience and ensuring it runs natively on ARM is a natural extension of our Windows commitment to SoC architectures.

Windows and Office alone is enough for a decent business device; but customers who buy Windows on ARM expecting their existing games or applications to run will be disappointed.

We have been here before. In the early days of Windows CE, devices ran a variety of processors such as MIPS or Hitachi SH3, and developers had to compile multiple binaries and create setups that installed the right one on each device. In an attempt to overcome the friction this created, Microsoft introduced the Common Executable Format (CEF) with Windows CE 3.0 in 2000. This was an intermediate language format which was translated to native code by a “translator” when it was installed onto a device.

It sounds  a bit like .NET or Java; and it was indeed a forerunner of the .NET Common Language Runtime, which appeared in 2002. However, CEF never really caught on. Although it solved deployment issues, it introduced performance problems and was troublesome to debug. Most developers preferred to stick with true native code.

Today though .NET is mature; and we also have Silverlight, a cross-platform implementation of the .NET Framework combined with multimedia player and graphics framework. If Microsoft includes .NET and Silverlight in its ARM build of Windows, that would solve some of the deployment problems, especially for business devices. Many custom applications are built for .NET; and these would in principle run without any need to recompile, since a .NET executable is intermediate code which is compiled to native code at runtime, though any code which includes “platform invoke” calls to native APIs would not work.

It is surprising therefore that neither .NET nor Silverlight is mentioned in Windows president Steve Sinofsky’s Q&A about Windows on ARM. Still, we should not read too much into that. It would be madness if Microsoft did not support its .NET technologies on this new platform, would it not?