[net.micro.mac] MDS on 512K MAC with ROM/Drive upgrade bug-free?

espen@well.UUCP (04/27/86)

	If I get the ROM/DRiVE upgrade for my 512K mac can I still
run the MFS for a while and not run into any incompatabilities with
all my old programs that might not be compatable with the new HFS
system?
	Peter Espen