Dear Mr. Duck ;-)
I would want to rewrite an Open Firmware with Ficl or Factor. Will this be possible ?
Depends on what your requirements are. Possible is always everything as long as you are willing to change enough code ;)
Since there is soon half a dozen open source openfirmware, the question is: Do you _really_ want to reinvent the wheel another time.
I saw your requests to the LinuxBIOS mailinglist and other lists before, asking interesting questions and never coming up with anything after that, so I keep this really short. If you are serious with your attempt come back with more detailed questions rather than a list of links.
Open Firmware requires Forth, and Forth is a great fit to the specific requirements of a boot firmware anyway. Any language that needs garbage collection of any sort is right out, completely unsuitable.
In practice, this is pretty much true.
Thank you for your answer,
well, .. Dont know what to say...
Stefan