It is open source OS for Arduino. The OS and other applications can be run from sdcard as it store the OS and application in “.bin” file (like the image file on computer or mobile phone).Pyxis also provide the FAT library
called “PFAT” for read or write EEPROM card (turn the EEPROM into a harddrive).

The demo project use two microcontrollers. One for manage the user interface part
(use arduino mega) and another one use mega2560 + dataflash for handle the whole display
(it’s on the touch screen shiled board).Visit Pyxis for more information about this interesting OS.

Below is video from youtube for the demo of Pyxis OS

Thank you,
Jitkasem Pintaya.

Reference site:
1. http://www.skewworks.com/
2. http://www.electoday.com/bbs/viewthread.php?tid=4233&extra=page%3D1

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1. More on Arduino part I.
2. Arduino FAT
3. Arduino revolution