Three point twenty was the first version that directly
supported 720K from
MICROS~1, although there were a LOT of two point elevens, such as Gavilan
that were set up by OEMS to do it.
That reminds me--I located a nice black vinyl binder and slipcase
with Grid MS-DOS 3.20 docs and disks in it. Grid did have its own
version of the MODE command as well as a few other utilities. Since
I no longer own a Grid, if anyone wants it (and is willing to pay
shipping), it's up for grabs. Email me off-list if you're
interested.
Cheers,
Chuck