I'm still waiting for the x86-64 VMS port.
http://vmssoftware.com/updates_port.html
See "History of the Port" in bottom right for older posts. You might want to do it bottom-up going from oldest to newest. Also, a few things trn posted indicated they were doing non-x86 work like Alpha releases, too. Example below:
http://www.prweb.com/releases/2017/07/prweb14487932.htm
So, it looks like they've been modernizing all three platforms instead of just porting to x86.
Does it? It looks to me that the last commit was almost five years ago[1].