Would this be possible? I have a Nortake 4 x 20 CU20045SCPB-U1J VFD wired to paralell on my
desktop PC.

Would it be possible for the empeg visuals to be
displayed on it?

You could write a program that grabs the display data from ethernet and throws it to your parallel port, kinda like what vnc for the empeg does. Shouldn't be too tough as long as you've already got down the rountines to write the VFD. Takle a look at the source for vnc for the empeg and go from there.

That's a character display.. 20 characters x 4 lines.. all it can display is it's built-in fonts. Or maybe it has some way to hack in controlling individual pixels, but there aren't enough of them, and it would look terrible with all the gridlines anyway.

I've been somebody that did kind of convert a character LCD to graphical. On a HD44780 compatible module you can upload custom fonts. If you construct a font character and then display it then you can turn on individual pixels. The number of characters you can make are limited though.

So it's possible but it's definately not fun, fast or particularly useful