The article then steps through the search process, beginning with plaintext searches of the binary dump, before progressing to a full disassembly of the plotter firmware.

Electronics enthusiasts looking for a new project to keep them busy this weekend may be interested in this excellent Arduino pen plotter which has been created using for rulers, 2 x NEMA 17 ...

A small matter of the plotter using hardware handshaking lines to signal a full buffer later, and he was able to use it to produce beautiful plots.