set_agp_mode
uint32 (*set_agp_mode)(uint32 command);
set_agp_mode,
nca.cmd = agp_bus->set_agp_mode(nca.cmd);
agp_cmd = sAGP->set_agp_mode(0);
agp_cmd = sAGP->set_agp_mode(agp_cmd);
nca->cmd = agp_bus->set_agp_mode(nca->cmd);