> May I submit(suggest?) that it is more likely that you are speaking of 1998 instead of 94

No. I'm not pulling this out of thin air, or misremembering. It wasn't easy, and it wasn't in the manpages, or only some of it. It was rather involved, and didn't work on first try. Not only that X-thing, but also which TTY/VT was on which head for tailing syslogs, std-error, and whatnot else. But it worked. And with no X on the Hercules, just between the Trident and Tseng, even reasonably fast.

I remember exactly because I moved shortly after that. I also remember which relief Xinerama brought me, when it appeared :-)

Edit: I also remember frying the Hercules and the attached screen with both of them giving me the magic blue smoke, because I've overdriven them a little. But it didn't matter, because that was already abandoned cybertrash at the time, used, and collected just for fun :-)