Teardown of the MS band

https://www.sparkfun.com/news/1681

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'cept I note there’s a cortex-M4 in there.

Do we know what they used for software?

Apparently they started with a blank main function in C++.

I read a comment from Paolo Patierno on linkedin about this:

“AFAIK no porting for Kinetis MCU @ Freescale so #MicrosoftBand isn’t based on #netmf but developed in C on bare metal w/ or w/o an RTOS”

There is a link from an alleged MS employee see link here (post 19) it has the ring of truth to it.
https://www.ghielectronics.com/community/forum/topic?id=17190&page=2#msg171108