Int 2F Fn 4A11  U - Dblspace.bin - Get Relocation Size                     [d]

   AX = 4A11h
   BX = FFFFh

Return: AX = number of paragraphs needed by DBLSPACE.BIN

Note:  used by DBLSPACE.SYS to relocate the DBLSPACE driver to its final
     position in memory

See Also: AX=4A11h/BX=0000h,AX=4A11h/BX=FFFEh