From: "Maciej W. Rozycki" <macro at linux-mips.org>
I've only ever heard of and saw a single kind of
monochrome graphics
hardware for x86 PCs and that was the Hercules Graphics Card (HGC) and its
clones, and these were already gone by early to mid 1990s.
The Wyse 700 and Bell Tech Blit were both ISA bus mono video cards.
There were others (maybe Radius...Metheus as well?).
P.S. - Sorry if I included the whole digest in my previous reply. Long day.
KJ