I found no difference in memory used under dos 5 with 2.21 and 2.22. The key
differences is that the upper limit for dos version chack is now removed, so it
can work with dos 7, 8 and 8 (when/if they come) and it is supposed to load
high with LH MSCDEX /D:xxx /M:xx but I could get it to do so with dos 5 on
two different computers. (couldn't get it to load high)