This is another example of compilations being inferior to the originals. But I noticed the native resolution of these Monkey Island 2 in EGA screenshots is 640x400. I thought this odd because I thought Monkey Island 2 used a 640x350x16 for its dithered EGA graphics and the executable picked the 640x350 mono mode instead. It would be dangerous and unreliable to tweak a fixed-frequency EGA monitor to display 400 lines, so it must be using the 640x200x16 mode (double scanned of course.) The CD versions might as well be using the 640x200x2 CGA mode!

Ultima I finally works correctly in EGA, I am happy to report.

Glad it works for you as well. Was a quite odd thing with
bios text output/vga register settings.