it's a de-facto standard for SVGA cards to produce
the Hercules
resolutions without complaint.
Um, no. It's the other way around. I think the number of clone VGA
cards I have ever seen that would produce/emulate Hercules 720x348
mode 1. I could count on one hand, and 2. were all manufactured before
1990.
Tell that to my Geforce 8800GTS, which does it every day.