Wow, that was fast! I had no idea they were XPMs, but that makes sense. (I think my favorites are SHADES{1,2}.)

I'll keep an eye out for interesting things happening with the MC400 in the future :) FWIW a ROM dump would probably let MAME start headscratching their way through it, and I'd love to plau with the UI (it looks really unique), but dumping just the fonts is a very workable start.

(I forgot to mention that that webpage has the images fractionally enlarged for some reason, making them blurry - opening them in a new tab makes them pixel-perfect.)