I'm not sure I get this. I looked around the website and can't seem to find any schematics from which to build the adapter. I would assume that I have to find a way to flash the chip with the downloaded code? Definitely not for the casual user.

Theoretically, one could with this adapter create a Mac Plus to PS-2 adapter, then use a PS-2 to USB adapter to connect the Mac Plus keyboard to a Modern Mac. So it has some very exciting applications.

Am I missing something here?