In this parameter one can specify options that will go into effect only when
BibDB is used under Windows 3.x 386 enhanced mode. ``noxms" and ``noems"
disable XMS and EMS usage under Windows 3.x, respectively, while ``noshell"
disables shelling to DOS from BibDB within Windows. Note that XMS and EMS
usage in a Windows 3.x DOS box may sometimes fail, since Windows does not
always return the correct amount of free XMS memory.