Not sure, will it have USB connection to the PC? If you have to remove the card from Jaguar, plug into PC, write game, remove from PC, re-plug into Jaguar and then boot, well this will do for a hello world, but nothing else.
Good for me is: BJL ROM (which makes a register dump) + SkunkBoard. Best would be if the SkunkBoard would have a RAM to store the "ROM" instead.
Here is the awesomeness in the works: