“My Oscilloscope Pong project didn’t really quench my interest in designing and building something big with discrete semiconductor circuitry. And let’s face it, a derivative of Pong rendered in primitive vector graphics on an X-Y oscilloscope display just doesn’t have the allure of a version that renders proper raster-scanned graphics on a video display monitor. So, once again, I simply did what was plainly logical and went ahead and designed and built this.
The pdf document linked to above contains a bit more of a description, more photos and the complete schematic diagrams so than anyone so inclined could build a duplicate. Maybe something to try if your are bored with playing with Arduinos?”