Model_Support.html is the definitive list. It is generated automatically from the source code based on what Chirp itself thinks it supports. This means it's much less susceptible to errors and omissions than the list on the home page. So yes, Chirp supports your V80. I'll update the wiki.
Hrm, hang on. In my tree, chirp/icv80.py shows as not committed to mercurial, and there are large chunks of the code commented out (such as tone-related bits and what not).
It's got my copyright on it, from 2011, but I honestly don't remember working on it. Perhaps I forgot to finish it?
I believe the reason that it's in the Model_Support.html is because it's in my local tree (and that's where I generated the support file for the last release). It shouldn't be in any of the actual builds though.
Anyone willing to give the uncommitted file a shot to see if it's close?