The list is coming from a static html file, called miner.html. You can add a complete list of algorithms that sgminer supports. However because the firmware on the chip doesn't have the library the miners will default to the base algorithm. On the Giant B it defaults to Blake. Not sure about the X10.

What I have done on my GB, I have added the list and noticed that many will connect to the pools correctly and will send data back and forth, and show as live on the status page of the miner. Those that do connect come back with 99.9% reject errors, not because sgminer didn't have the code, but because of the hardware is incorrectly hashing with the Blake algorithm instead of using the one selected by sgminer.

By telling sgminer to use cryptonight or nist5 for example, it works, as it passes along the commands to the hardware. However, the hardware level (STM Chip Firmware) is stopping us from reaching our goal of adding them and running those additional coins.

I'm very certain this can be accomplished, but its a bit beyond me at this point. We need a C Programmer with STM Chip programming experience.