I ocne used a soundcard output as an X/Y display driver - stereo output, with X in one channel and Y in the other. It worked, but not well; the output turned out to be capacitor-coupled (as in, the long-term DC value is always zero) and is filtered, presumably in ways that make sense for audio signals. Still, I managed to get it to display some simple vector graphics. One of my "when I win the lottery" projects is to build something better for that. Not because I have a use for it, but because I think it'll be fun to build (or try to build, as the case may be). I also want to take a 3RP1 I have and build an oscilloscope around it, a related but distinctly different project.... /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B