Many of those /are/ programmable. Here's the code we used to get code execution on an SD card bought at the markets in Shenzhen (the project I did with bunnie,

Many of those /are/ programmable. Here's the code we used to get code execution on an SD card bought at the markets in Shenzhen (the project I did with bunnie, referenced above): https://github.com/xobs/ax2xx-code https://github.com/xobs/ax2xx-code The factory needs to get code on there somehow, and usually the method isn't documented. Oftentimes it's not locked down.