INT 67 - RM386 v6.00+ - EXECUTE XMS FUNCTION
        AH = EFh
        AL = function (00h-12h,80h-8Fh)
        other register as appropriate for XMS function
Return: varies by function (see INT 2F/AX=4310h)
Note:   these functions appear to be equivalent to the XMS functions with the
          same numbers
SeeAlso: AH=5Dh"RM386",INT 2F/AX=4310h

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