Int 62 Fn 00CC  u - Fgdriver V4.02 - "fg_vbaddr" - Get Address Of Virtual  [V]

   AX = 00CCh
   BX = virtual buffer handle (0000h-001Fh)

Return: DX:AX -> virtual buffer

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=00CFh,AX=00D3h