Hi Charles. This group is centered around the Z80 Membership Card. The Z8MC was just my clumsy abbreviation. I was not aware that there was such a thing as a Z8 till yesterday. I don’t know anything about compatibility.
in a few days I’ll rename the group to Z80MC unless someone has a better idea. That will change the email address so I’m going to wait until membership settles down.
sorry for the confusion.