CALL xxxxh:xxxxh - Extended Memory SpecificationA specification devised by Microsoft which allows multiple programs to share extended (above 1 megabyte) memory and noncontiguous memory above 640K.  See also Upper Memory Block. (XMSsee Extended Memory Specification)
InstallCheck:	see INT 2F/AX=4300h
SeeAlso: INT 2F/AX=4310h