I've seen it on a HP 9835 and several HP
9845s. The 9845s seem to have
it even more often than the 264x terminals in my experience.
Oh great.... The one in my HP98780A (enhanced graphics monitor for the
9845) looks OK at the moment, but I guess I'll have the fun of removing
the faceplate sometime...
My 9845 is a somewhat odd configuration. It's a 9845B with the high-speed
language processor, the enhanced monitor (with the hardware graphics
accelerator board, etc) but only 1 RAM board (it's got the standard
ROM/RAM boards for each of the processors too, of course). Personally, I'd
have thought that anyone ordering a machine with those 2 high-performance
options would have stuffed it with RAM too.
-tony