The reason why I was asking about the IIsi rom in se30 is here:

http://stco.kais.kyoto-u.ac.jp/kojin/sakaki/Pasokon/8on030E.html

Look at the end of this page... You'll see something strange:

SE/30 working with IIsi rom.   (and I have and old dead IIsi at home)

maybe a clean 32 bits rom would be noce in se30.

Jeff