I'm sure you could wire in a DSP1 somehow as a mod to the device if you know how the unit technically works like maybe a schematic or reverse engineering it, but you'd want to be able to switch off the DSP1 as well. I remember copiers with DSP1 built in every once in a while had issues with a few games if the feature was turned on. It may just be better to keep it as an external. The hardware is already there poking out the back.
