this radio is controlled via NEMA not CI-V sequences..... This blog explains it (the only one I could find on web).
https://yachtzenagain.blogspot.com/2016/05/icom-ic-m802-remote-interface.html
Is this enough for a someone to make m803 controll varaac? I buy you a beer for it!
thanks Mark
I see that HamLib supports the M803 https://github.com/Hamlib/Hamlib/wiki/Supported-Radios and since VarAC supports HamLib why not just go that existing route?