HP SketchPro drives an HP 7220C plotter

The SketchPro is a digitizing tablet from the mid 80s while the 7220C is a flatbed A3-size plotter from the the late 70s. Both devices are serial, so we use a modern laptop running BBC Basic to read values from the tablet and draw lines on the plotter.
In this demo we use a drawing by restubudiman as a source image and copy it to the plotter.
More information on the SketchPro and the 7220C on the HP Museum website (www.hpmuseum.net)
Visit the www.series80.org site for information on the HP-Series 80 computers.