Int 62 Fn 00D5  u - Fgdriver V4.02 - "fg_vbopen" - Make Virtual Buffer Ac  [V]

   AX = 00D5h
   BX = virtual buffer handle

Return: AX = status
       0000h successful
       FFFEh no buffer defined for specified handle
       FFFFh invalid buffer handle

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

See Also: AX=00CDh,AX=00CEh,AX=00D1h,AX=00D4h,AX=00D9h