Got me another harddisk, also an old Connor, not sure if it works but can't seem to
find anything like a working DOS floppy with a FDISK.EXE which allows the removal of
non-DOS partitions.
A quick search for "remove non dos partition debug" should find an easy way to
wipe the partition table using the MSDOS Debug command. Here's one such link:
http://forums.techguy.org/dos-other/36829-removing-dos-partition-debug.html