How Sifteo built a Super Nintendo out of a wireless keyboard

Decades ago, platforms like the Commodore 64 encouraged tinkerers and do-it-yourselfers of all kinds. You could buy commercial games, sure, but the manual that shipped with the C-64 also told you what you needed to know to make your own games, tools, or even robots. The manual included a full schematic, the components were in large through-hole packages, and most of them were commonly-available chips with published data sheets.