Roll-your-own IO. Wouldn't work with this particular device, but for example budget oscilloscopes have an FPGA for the processor to operate the sensing system.

Roll-your-own IO. Wouldn't work with this particular device, but for example budget oscilloscopes have an FPGA for the processor to operate the sensing system. Implementing something you could buy off-the-shelf on an FPGA is almost always a fools' errand.