Int 62 Fn 0071  u - Fgdriver V4.02 - "fg_memavail" - Query Amount Of Free  [V]

   AX = 0071h

Return: DX:AX = number of bytes of conventional memory available

Note:  the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)

See Also: AX=005Dh,AX=0072h