Sébastien Furic worked in developing a full ANS Forth compiler for the Sharp PC-E500 a few years ago (back in 2001-2003) and he was nice enough to send me (in September 2007) the source code and the materials to make it available here for everybody.
This page is just a repository for Sébastien's work, I did not participate in this development and I can hardly help anybody in using or enhancing this great Forth compiler as I do not know the PC-E500 well myself.
All information I have was kindly shared with Sébastien on my Pocket Computer forum:
Thread #2 - Answer #4 (August 28th, 2002): Sébastien announces the development of this ANS Forth Compiler
Thread #12 (September 18th, 2002): a rich exchange of e-mails between Claude and Sebastien. Sorry, they are both French, so the topic was written in French (please use an online translator for reading it)
Thread #13 (September 18th, 2002): some more information
Thread #391 (June 3rd, 2003): still some more information, in French
Thread #1575 (September 1st, 2007): Sébastien is still alive!