I started with a .rmdu file I found on hifi-remote.com, which sufficed to identify which entries from a .hex file to use. (apparently the original supplier for the boxes was russound)

Unfortunately, it appears there are some errors in the rmdu file. Slowmo wasn't the code they said it would be, same for clear. it was right about the thumbs, live/swap and zoom.

Any suggestions on how to work from the obc's to which functions in the .hex?