Author located for these wonderful Reference Testbeds!
In this old thread
from 2006 I found a EBW1150 attachment created a long time ago that showed all the fonts and characters available as a small Quick reference: EBWQuickRef.imp
by P. Ludowissy.
Well it turns out MobileRead member allovertheglobe
is the author of all the reference .imp's in this post.
Kudos to allovertheglobe
for a truly valuable and inspirational exploration of everything .imp!
A bit of karma coming your way, Sir....