I have asked Peter Wendrich(the author of the C64 core)
to port the code to the Minimig.
He told me that he doesn't have a Minimig, so he can't make a port.
I would donate him a Minimig, but I have at the moment only parts for my own Minimig.(only one blank PCB)
I hope that Illuwatar will finish his Board design so I can buy from him some blank Boards.

Jens