I'm just wondering if it would be possible to do something like this. I see that gdemu is not longer available and clons are about 90€ or so.
On the other hand I've seen that gdemu uses a cyclone II FPGA and an ARM CPU on their board.
Maybe there is a way, or even someone have analyzed the option of having a core and some connector using the mister gpio connected to the Dreamcast, and emulate a GDEMU... Or maybe this is just a dream hehehe