I've gotten some requests for another batch of Action Replay USB Link boards. In the new version under developing, I have revised the board to use less parts and believe I have found a solution to prevent the problem where the Saturn can be inadvertantly powered through the Comms Link port which interferes with booting. There is enough free space that I intend to add holes for standoffs and LEDs to indicate activity. You can never have enough blinking things on a circuit, and I am enjoying the convenience of SMT LEDs now that I have had a chance to use them in some other projects.
