Late post but here goes.
Robert17 and myself have been running an unregistered version of Grapevine on an A600 1 Meg Chip and 4 Meg Fast RAM board internally installed.
We use a 3.1 ROM with Classic Workbench, Gadtools Miami (Registered and no MUI).
At times we can get into Amiga.Org chat but mostly get an error saying
"Nicknames starting with a ~ cannot connect".
Any hints please...