Comment by p0w3n3d
2 months ago
I believe it is not firmware. Because of many reasons, one would be issuing firmware release for every machine would be impossible. It is probably lying so low in the hardware layer, one cannot simply remove or alter it without desoldering etc.
Many microprocessors are capable of having selective updates and it may be the same processor which is fetching the update. You might think of their internals to be more like a crude file system.
Ok, next to impossible then. Maybe printing tiny white text on solid black background could help obfuscate the dots. Or using a pen plotter...
What if you print a page with a slightly yellow background? Would it know to use a different color for the tracking dots?