SUMMARY
The Quarterdeck Qemm 7.03 READ.ME file states the following:
If you are using QEMM's Stealth DoubleSpace feature and you
decide to switch back to MS-DOS 6's memory manager, the
ST-DBL.SYS driver will perform the same function as DOS's
DBLSPACE.SYS /MOVE. That is, it will allow DBLSPACE.BIN to be
moved into upper memory. You can replace ST-DBL.SYS with
DBLSPACE.SYS, but you will suffer no ill effects if you do not.
Although this is true, you do sacrifice approximately 12 kilobytes of
conventional memory readme