added memIn for IOPorts
added memIn for IOPorts

ransford/mspsim,mspsim/mspsim,fvdnabee/mspsim,cmorty/mspsim,mspsim/mspsim,contiki-os/mspsim,nfi/mspsim,fvdnabee/mspsim,joakimeriksson/mspsim,nfi/mspsim,contiki-os/mspsim,joakimeriksson/mspsim,ransford/mspsim,cmorty/mspsim