Apple 410 Plotter prints the Adler Locomotive

Most of this video is sped up 2x. Yes, it took over 20 minutes to draw this! Compare to a professional machine: The box to the right of the plotter is a serial monitor. You can see the DTR bit (pin 20) toggle whenever the plotter is ready for more data. Data is being spoon fed to the plotter via a PowerShell script.