Using Ham Radio Deluxe with an Icom 720A

After the success of getting HRD to work with the Yaesu FT-736R as shown in another video, I thought I would try something totally ridiculous and see if I could do the same thing with a 31 year old radio. This one turned out to be quite a challenge. See the website at http://tinkyr.altervista.org/radio/projects/Vintage%20Icom%20Interface.htm