var.key = "picodrive_smsmapper";
    if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
       if (strcmp(var.value, "Auto") == 0)
-         PicoIn.hwSelect = PMS_MAP_AUTO;
+         PicoIn.mapper = PMS_MAP_AUTO;
       else if (strcmp(var.value, "Codemasters") == 0)
-         PicoIn.hwSelect = PMS_MAP_CODEM;
+         PicoIn.mapper = PMS_MAP_CODEM;
       else if (strcmp(var.value, "Korea") == 0)
-         PicoIn.hwSelect = PMS_MAP_KOREA;
+         PicoIn.mapper = PMS_MAP_KOREA;
       else if (strcmp(var.value, "Korea MSX") == 0)
-         PicoIn.hwSelect = PMS_MAP_MSX;
+         PicoIn.mapper = PMS_MAP_MSX;
       else if (strcmp(var.value, "Korea X-in-1") == 0)
-         PicoIn.hwSelect = PMS_MAP_N32K;
+         PicoIn.mapper = PMS_MAP_N32K;
       else if (strcmp(var.value, "Korea 4-Pak") == 0)
-         PicoIn.hwSelect = PMS_MAP_N16K;
+         PicoIn.mapper = PMS_MAP_N16K;
       else if (strcmp(var.value, "Korea Janggun") == 0)
-         PicoIn.hwSelect = PMS_MAP_JANGGUN;
+         PicoIn.mapper = PMS_MAP_JANGGUN;
       else if (strcmp(var.value, "Korea Nemesis") == 0)
-         PicoIn.hwSelect = PMS_MAP_NEMESIS;
+         PicoIn.mapper = PMS_MAP_NEMESIS;
       else
-         PicoIn.hwSelect = PMS_MAP_SEGA;
+         PicoIn.mapper = PMS_MAP_SEGA;
    }
 
    var.value = NULL;