INT 62 u - FGDRIVER v3.03 - "FG_ALLOCXMS" - CREATE LOGICAL VIDEO PAGE (XMS)
        AX = 0003h
        BX = page number (0001h-003Fh)
Return: AX = status (see AX=0001h)
Notes:  For FGDRIVER v1.10, this function was "FG_BESTMODE" (see AX=0005h),
          and "FG_ALLOCXMS" was AX=009Fh
        You must first call "FG_INITXMS" (see AX=004Eh) before using this
          function
        The only operation which is allowed on logical pages is "FG_COPYPAGE"
          (see AX=0012h)
SeeAlso: AX=0000h,AX=0001h,AX=0002h,AX=0012h,AX=002Eh,AX=004Eh

.