I found a post, where the user opened a jetBook Color:
http://www.the-ebook.org/forum/viewt...65da450#800932
He writes, that on the backside of a back plate stands
Windows Embedded CE 6.0 core!
EDIT: As this Hanvon reader is the foundation, it states WinCE 6.0:
http://www.hanvon.com/en/products/eb...ucts-C920.html
Another one writes about the confusion concerning the resolution. As far as I understood, the reader has a 800x600
ppi and with subpixel-dithering it makes out of it 1600x1200
dpi.
9.68" x >200 dpi ~= sqrt(1600^2 + 1200^2)