[kbeckmann]

Not a silly question at all. I would also like to know this. Would be a fun way to play around with assembly without the need of a tool chain etc. Maybe even on your phone while on the train. If this doesn't exist already, I'd be happy to start working on something like this.

[pmjordan]

You could probably start from here: x86 Linux running in a web browser, also by Fabrice Bellard. http://bellard.org/jslinux/