I think CE 6,7 or even 8 on something like the 720 would be doable
(if they still supported StrongARMs.
) You
just use the ROM only filesystem with a Storage Card mounted as root like Windows Mobile 5 instead of the
traditional RAM/ROM filesystem that H/PC 2000 uses. You could probably make a 5MB ROM image that gets copied to
RAM to XIP and then just put the rest of the system files on a
(fast
) CF card mounted as root.
It would probably be possible to backport them too. The other day I found a backported CE distribution for
ebmedded 386 PCs!
(http://www.dpie.com/software/wince.html
) So I'm sure it's possible to backport it to older
processor revisions if you have the skill and manpower.
But all of the above comes way later.
It's the drivers and BSP bringup that are the real bitch, unfortunately. Though, it seems Douglas Boling of
"Programming Windows CE" fame has ported CE 6 or 7 to the Rasberry PI. But I think even that is missing drivers
that make it useful. The PI still uses proprietary hardware with closed source drivers despite running Linux
much like many of the Android devices.
Here's the CE BSP for the Pi and some screenshots:
https://ceonpi.codeplex.com/
http://hackaday.com/2013/11/27/windows-ce-on-a-raspberry-pi/
Hmm, maybe someone could build a new H/PC using Rasberry PIs.