Int 10 Fn 6A01  - Direct Graphics Interface Standard (dgis) - Redirect Ch  [V]

   AX = 6A01h
   CX = 0000h
   ES:DI = address of device to send INT 10 output to

Return: CX = 0000h  output could not be redirected
        else INT 10h output now routed to requested display

See Also: AX=6A02h