Afaik, there was never a Windows CE general purpose environment for the Dreamcast. Sega supported game developers using Sega's 100% propriatary OS or using Windows CE as embedded OS. Either way, the OS would ship on the disc, and isn't a lot more than a kernel and libraries.
Of course, BSDs and Linux were ported to the Dreamcast at some point, as with anything that can boot user provided code and has enough ram.
The dreamcast did have a web browser, and keyboard and mouse, but without significant local writable storage, would make a lousy general purpose computer.
Afaik, there was never a Windows CE general purpose environment for the Dreamcast. Sega supported game developers using Sega's 100% propriatary OS or using Windows CE as embedded OS. Either way, the OS would ship on the disc, and isn't a lot more than a kernel and libraries.
Of course, BSDs and Linux were ported to the Dreamcast at some point, as with anything that can boot user provided code and has enough ram.
The dreamcast did have a web browser, and keyboard and mouse, but without significant local writable storage, would make a lousy general purpose computer.