"I know it would be way more fun, possibly cheaper, and I presume I can get all the necessary materials from RadioShack or Mouser (I made a cable for direct serial connection and one for connecting my TI computer to my PC that way, but I don't know if this would be a bit out of my league). Has anybody tried something like that? Is it feasible? Do you have instructions, or hardware to reverse-engineer?"
If only more PC makers would make this a standard port, IR would be very useful. As it is ... does anyone have any successful projects to reveal?