This FPGA board was used on crypto farms to generate some Bitcoins. Soon the FPGA were replaced with complete custom chips that were specifically built to mine even more efficient. The boards can be found for cheap on the internet.

Using uboot and buildroot I compiled a custom Linux and got as far as the serial console. At that point I switched to the Raspberry Pi and got the console running there as well.

All this was in preparation to create my very own embedded Linux board, but I did not get around to it yet.