How can I enable EGA graphics in Windows 3.0 on an 8086?

Wow, glutton for punishment eh? :)

Are you sure there is an EGA or better video card in there? CGA isn't "monochrome", it's 4-colour.

There was never a 286 requirement for EGA that I'm aware of (it's been a while though :) ). You just need to ensure the right driver is installed and that you have configured Windows to use EGA.

Here's a page that has some active Win3X EGA driver links.

Here's a how-to page with the basics of enabling VGA in Windows 3.1 -- Maybe it will be of help getting your EGA running as well.

Hope that helps...