I was having a look on Google Code the other day to see what Amiga and related projects are hosted there since it's closing and found both minimig https://code.google.com/p/minimig/
and MiST https://code.google.com/p/mist-board/
projects there. The MiSt project Amiga core page links to a minimig-mist Github https://github.com/rkrajnc/minimig-mist
. A wider search found a Github for minimig on the Altera-DE1 https://github.com/rkrajnc/minimig-de1
. There is also minimig for the TurboChameleon64 on Github https://github.com/cnvogelg/minimig_tc64
. The code base for minimig seems to be spread all over the place with probably other variations not (yet) made public.