Found it. The link is here: http://www.qsl.net/ab6cq/interfacepage.html
It's not clear what he is switching but I think it might be the RTS (ptt) instead of the more conventional DTS (cw). I've emailed him that question.
In the mean time, can someone please explain any advantage to using RTS for PTT and DTS for CW or was it just the original convention because you had to choose something and they stuck.
Thank you and 73,