Is MS-DOS, PC DOS and DR-DOS vintage enough to count?

I'm experimenting with some old DOS versions, notably PC DOS, in VirtualBox. I have a PC-DOS 2000 system with DesqView and DesqView/X working fairly well -- no networking yet but I'm working on it. I am also trying to get a DR-DOS 8 VM up and running. DR-DOS 7.03 is no problem, but I've had no joy getting DR-DOS 8.1 to install to hard disk. It's reluctant to SYS a hard disk, and when it did, it mis-diagnosed it as FAT-12 and wouldn't boot. Using Norton DiskTools, I've managed to transfer the system files, but they display the message DR-DOS 8.1 ... and then it freezes. Can this late version, mainly used for utility floppies, actually boot And although I've not tried it yet, the same question applies to PC DOS 7.1, the early-noughties version that can understand FAT32 and long filenames. -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)