I remember the discussion about creating a "old-style" custom video game console out of pre existing parts and the discussion just about ending when it got to video hardware because your options are severely limited. I've always thought about how older video game consoles would output analog video even though it is originally digital video. (If I'm not mistaken, this is how HDMI for the NES can work?) I looked at how HDMI signal is encoded, and it appears it is really just 3 pins that carry 8 bit color values (RGB) in a series. I then thought about how you could get 3 CPUs to handle each color channel where their outputs would be converted to be in a series instead of in parallel. They would have to be insanely fast though, because I looked at something that appeared that the lowest resolution in the HDMI standard is 480p, and that's 640 x 480 x 60 = 18,432,000 pixels in one frame. So already, you'd need each CPU to be several times faster than 18MHz, and I've seldomly seen an 8 bit CPU past 10. Yeah, this was a dumb idea.