I actually owned a working Northstar in Canada over 15 years ago. It did use the wierd hard sector format floppies. It was an S100 BUS machine. I loved it It even came with a FORTRAN/COBOL compiler, and of course BASICA. CPM a nice OS. AH....S100 BUS machines those were the days. I really miss my OSBOURNE & KAYPRO SNIFF..... Kevin