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I believe the work we did to integrate FreeRTOS was to customize its board support to add "Xen" as a backend. We did not go through DOS, I know. I wasn't the primary engineer involved so my expertise starts to drop off quickly from there, but let me point you to our GitHub site:

ÂÂhttps://github.com/GaloisInc/FreeRTOS-Xen

which is bitrotting slightly but still potentially interesting, as well as to Jonathan's blog post and Xen Summit talk on the subject:

ÂÂhttps://blog.xenproject.org/2015/02/02/getting-started-with-freertos-for-xen-on-arm-2/

ÂÂhttps://www.youtube.com/watch?v=yDs7aNFcnIM

Hope one or more of those helps.

- Adam

On Tue, Feb 9, 2016 at 2:09 PM Emir Elkholy <emirelkholy@xxxxxxxxx> wrote:

Thanks for the feedback. Sounds like I can try the same thing using Windows CE. How does FreeRTOS boot? From what I can see online it uses DOS to boot, is how you have used it with Xen? Windows CE uses a dos bootable drive to run a program named biosloader which loads the OS image when the board is powered on after BIOS runs. Does FreeRTOS boot in a similar manner? If so I can look into how to do the same for Windows CE as you have for FreeRTOS...

On Tue, Feb 9, 2016 at 1:58 PM, Adam Wick <awick@xxxxxxxxxx> wrote:
I have no experience with Windows CE, but we used Xen to host FreeRTOS for an experimental quadcopter a couple years ago. We got "close enough for research" real time results by pinning the RTOS to a CPU and making it the sole user of that CPU. We were planning to look into the ARINC scheduler to get better real time performance, but our client became more interested in a different area of the project and we never got a chance to pursue it.

- Adam

On Mon, Feb 8, 2016 at 10:00 AM Emir Elkholy <emirelkholy@xxxxxxxxx> wrote:
Currently we boot Windows CE from a dos bootable drive using a program called biosloader on our x86 Baytrail board (Intel). After the BIOS loads our USB stick (or SSD) with the Windows CE image is loaded by BIOSloader. Would Xen be able to load Windows CE in a similar fashion? Has Xen ever been used with an RTOS like Windows CE? I would like to use Xen to run linux for our GUI and Windows CE for our real-time code.Â

Thanks!
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Re: [Embedded-pv-devel] Xen with RTOS (such as Windows CE)