The default was GridOS.
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.
You should be able to run WINDOZE three point ten on it, although it takes
some work to squeeze it down to fit.
However, I do NOT think that it can do a 132 column text mode.