Hey, so I pulled my 7404 interface out of storage (been awhile). Found one of my leads needed resoldering...did that, and hooked it up. Ran a serial line from the interface to the PC, but the PC cant seem to talk to the interface.. nothing. I cant remember - do I need a null modem interface between the PC and the 7404 interface? I vaguely remember that I had one, but cant find it. (I would think I would have stored them together if I did need it). But it makes sense that I would.