Instead of my own text dump variant, using this version which steals a lot from Nick Gammon; works better due to interupt driving. Funny how interupts were too latent for my earlier experiments; thats going to annoy me to no end :) Will restructure the code to be more like my other experiments, add an i2c or serial (atmega644p ftw!) gateway, and then its a matter of plugging into earlier zikzak design, or the zik-z80 design