Didn’t do winmodems, that would be a nightmare.
I can’t remember how long it was until xf86config made things slightly easier, yeah, getting modelines at first was basically impossible, I think it was trial and error for hours at least.
I don’t think it became easier at all until it was forked off into Xorg and they started making dramatic improvements.
I think it was trial and error for hours at least.
It certainly was until I discovered the monitor I hadn’t fried had the modelines printed on a sticker on the back…