On Jun 1, 2014, at 12:56 AM, Fred Cisin <cisin at xenosoft.com> wrote:
Victor/Sirius 9000 had the least compatible MS-DOS
disk format.
I dunno, I think the 3.5" disks on the HP 150 that came out in 1983 were less
compatible, since everything else was still doing 5.25. :-)